SYMBOLCOMMON_NAMEaka. SYNONYMS
win.etumbot (Back to overview)

EtumBot

aka: HighTide

Actor(s): IXESHE


There is no description at this point.

References
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:dc58892, author = {SecureWorks}, title = {{BRONZE GLOBE}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-globe}, language = {English}, urldate = {2020-05-23} } BRONZE GLOBE
EtumBot Ghost RAT IXESHE
2014-09-03FireEyeNed Moran, Mike Oppenheim
@online{moran:20140903:darwins:1b05935, author = {Ned Moran and Mike Oppenheim}, title = {{Darwin’s Favorite APT Group}}, date = {2014-09-03}, organization = {FireEye}, url = {https://www.fireeye.com/blog/threat-research/2014/09/darwins-favorite-apt-group-2.html}, language = {English}, urldate = {2019-12-20} } Darwin’s Favorite APT Group
EtumBot ThreeByte WaterSpout IXESHE
Yara Rules
[TLP:WHITE] win_etumbot_auto (20220516 | Detects win.etumbot.)
rule win_etumbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.etumbot."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.etumbot"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 8818 8811 8a00 02c2 0fb6c0 8a8405fcfeffff }
            // n = 6, score = 400
            //   8818                 | mov                 byte ptr [eax], bl
            //   8811                 | mov                 byte ptr [ecx], dl
            //   8a00                 | mov                 al, byte ptr [eax]
            //   02c2                 | add                 al, dl
            //   0fb6c0               | movzx               eax, al
            //   8a8405fcfeffff       | mov                 al, byte ptr [ebp + eax - 0x104]

        $sequence_1 = { 02c2 0fb6c0 8a8405fcfeffff 320437 8806 46 }
            // n = 6, score = 400
            //   02c2                 | add                 al, dl
            //   0fb6c0               | movzx               eax, al
            //   8a8405fcfeffff       | mov                 al, byte ptr [ebp + eax - 0x104]
            //   320437               | xor                 al, byte ptr [edi + esi]
            //   8806                 | mov                 byte ptr [esi], al
            //   46                   | inc                 esi

        $sequence_2 = { 8bf9 c1ef18 33c7 f7d1 23c1 42 }
            // n = 6, score = 300
            //   8bf9                 | mov                 edi, ecx
            //   c1ef18               | shr                 edi, 0x18
            //   33c7                 | xor                 eax, edi
            //   f7d1                 | not                 ecx
            //   23c1                 | and                 eax, ecx
            //   42                   | inc                 edx

        $sequence_3 = { 68d0070000 ff15???????? ffd7 2bc3 3bc6 72ed 5f }
            // n = 7, score = 300
            //   68d0070000           | push                0x7d0
            //   ff15????????         |                     
            //   ffd7                 | call                edi
            //   2bc3                 | sub                 eax, ebx
            //   3bc6                 | cmp                 eax, esi
            //   72ed                 | jb                  0xffffffef
            //   5f                   | pop                 edi

        $sequence_4 = { c745b46f66745c c745b85c57696e c745bc646f7773 c745c05c5c4375 c745c47272656e c745c874566572 }
            // n = 6, score = 300
            //   c745b46f66745c       | mov                 dword ptr [ebp - 0x4c], 0x5c74666f
            //   c745b85c57696e       | mov                 dword ptr [ebp - 0x48], 0x6e69575c
            //   c745bc646f7773       | mov                 dword ptr [ebp - 0x44], 0x73776f64
            //   c745c05c5c4375       | mov                 dword ptr [ebp - 0x40], 0x75435c5c
            //   c745c47272656e       | mov                 dword ptr [ebp - 0x3c], 0x6e657272
            //   c745c874566572       | mov                 dword ptr [ebp - 0x38], 0x72655674

        $sequence_5 = { c745ac5c5c4d69 c745b063726f73 c745b46f66745c c745b85c57696e }
            // n = 4, score = 300
            //   c745ac5c5c4d69       | mov                 dword ptr [ebp - 0x54], 0x694d5c5c
            //   c745b063726f73       | mov                 dword ptr [ebp - 0x50], 0x736f7263
            //   c745b46f66745c       | mov                 dword ptr [ebp - 0x4c], 0x5c74666f
            //   c745b85c57696e       | mov                 dword ptr [ebp - 0x48], 0x6e69575c

        $sequence_6 = { 57 0fbe38 33f6 33db }
            // n = 4, score = 300
            //   57                   | push                edi
            //   0fbe38               | movsx               edi, byte ptr [eax]
            //   33f6                 | xor                 esi, esi
            //   33db                 | xor                 ebx, ebx

        $sequence_7 = { 53 56 57 8b3d???????? ffd7 8b7508 }
            // n = 6, score = 300
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b3d????????         |                     
            //   ffd7                 | call                edi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]

        $sequence_8 = { ffd7 8b7508 8bd8 69f660ea0000 }
            // n = 4, score = 300
            //   ffd7                 | call                edi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8bd8                 | mov                 ebx, eax
            //   69f660ea0000         | imul                esi, esi, 0xea60

        $sequence_9 = { 8bf1 0fbe0a c1e004 03c1 8bc8 81e1000000f0 7407 }
            // n = 7, score = 300
            //   8bf1                 | mov                 esi, ecx
            //   0fbe0a               | movsx               ecx, byte ptr [edx]
            //   c1e004               | shl                 eax, 4
            //   03c1                 | add                 eax, ecx
            //   8bc8                 | mov                 ecx, eax
            //   81e1000000f0         | and                 ecx, 0xf0000000
            //   7407                 | je                  9

        $sequence_10 = { c745c47272656e c745c874566572 c745cc73696f6e c745d05c5c496e c745d47465726e c745d865742053 c745dc65747469 }
            // n = 7, score = 300
            //   c745c47272656e       | mov                 dword ptr [ebp - 0x3c], 0x6e657272
            //   c745c874566572       | mov                 dword ptr [ebp - 0x38], 0x72655674
            //   c745cc73696f6e       | mov                 dword ptr [ebp - 0x34], 0x6e6f6973
            //   c745d05c5c496e       | mov                 dword ptr [ebp - 0x30], 0x6e495c5c
            //   c745d47465726e       | mov                 dword ptr [ebp - 0x2c], 0x6e726574
            //   c745d865742053       | mov                 dword ptr [ebp - 0x28], 0x53207465
            //   c745dc65747469       | mov                 dword ptr [ebp - 0x24], 0x69747465

        $sequence_11 = { 81e1000000f0 7407 8bf9 c1ef18 }
            // n = 4, score = 300
            //   81e1000000f0         | and                 ecx, 0xf0000000
            //   7407                 | je                  9
            //   8bf9                 | mov                 edi, ecx
            //   c1ef18               | shr                 edi, 0x18

        $sequence_12 = { 8d45f4 6820a10700 50 68???????? 68???????? }
            // n = 5, score = 300
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   6820a10700           | push                0x7a120
            //   50                   | push                eax
            //   68????????           |                     
            //   68????????           |                     

        $sequence_13 = { 23c1 42 4e 75df }
            // n = 4, score = 300
            //   23c1                 | and                 eax, ecx
            //   42                   | inc                 edx
            //   4e                   | dec                 esi
            //   75df                 | jne                 0xffffffe1

        $sequence_14 = { c645d720 c645d84e c645d954 c645da20 }
            // n = 4, score = 200
            //   c645d720             | mov                 byte ptr [ebp - 0x29], 0x20
            //   c645d84e             | mov                 byte ptr [ebp - 0x28], 0x4e
            //   c645d954             | mov                 byte ptr [ebp - 0x27], 0x54
            //   c645da20             | mov                 byte ptr [ebp - 0x26], 0x20

        $sequence_15 = { 8b45f4 0345f0 8b4d08 034dec 8a11 8810 8b45f0 }
            // n = 7, score = 200
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   0345f0               | add                 eax, dword ptr [ebp - 0x10]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   034dec               | add                 ecx, dword ptr [ebp - 0x14]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   8810                 | mov                 byte ptr [eax], dl
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_16 = { 53 8b5c240c 56 c60200 }
            // n = 4, score = 200
            //   53                   | push                ebx
            //   8b5c240c             | mov                 ebx, dword ptr [esp + 0xc]
            //   56                   | push                esi
            //   c60200               | mov                 byte ptr [edx], 0

        $sequence_17 = { c68548ffffff70 c68549ffffff3a c6854affffff2f c6854bffffff2f c6854cffffff77 c6854dffffff77 }
            // n = 6, score = 200
            //   c68548ffffff70       | mov                 byte ptr [ebp - 0xb8], 0x70
            //   c68549ffffff3a       | mov                 byte ptr [ebp - 0xb7], 0x3a
            //   c6854affffff2f       | mov                 byte ptr [ebp - 0xb6], 0x2f
            //   c6854bffffff2f       | mov                 byte ptr [ebp - 0xb5], 0x2f
            //   c6854cffffff77       | mov                 byte ptr [ebp - 0xb4], 0x77
            //   c6854dffffff77       | mov                 byte ptr [ebp - 0xb3], 0x77

        $sequence_18 = { c645c265 c645c33b c645c420 c645c54d c645c653 c645c749 }
            // n = 6, score = 200
            //   c645c265             | mov                 byte ptr [ebp - 0x3e], 0x65
            //   c645c33b             | mov                 byte ptr [ebp - 0x3d], 0x3b
            //   c645c420             | mov                 byte ptr [ebp - 0x3c], 0x20
            //   c645c54d             | mov                 byte ptr [ebp - 0x3b], 0x4d
            //   c645c653             | mov                 byte ptr [ebp - 0x3a], 0x53
            //   c645c749             | mov                 byte ptr [ebp - 0x39], 0x49

        $sequence_19 = { 80e10f c0e102 c0eb06 02cb }
            // n = 4, score = 200
            //   80e10f               | and                 cl, 0xf
            //   c0e102               | shl                 cl, 2
            //   c0eb06               | shr                 bl, 6
            //   02cb                 | add                 cl, bl

        $sequence_20 = { 83c204 3b5514 7608 83c8ff }
            // n = 4, score = 200
            //   83c204               | add                 edx, 4
            //   3b5514               | cmp                 edx, dword ptr [ebp + 0x14]
            //   7608                 | jbe                 0xa
            //   83c8ff               | or                  eax, 0xffffffff

        $sequence_21 = { c645d057 c645d153 c645d241 c645d353 }
            // n = 4, score = 200
            //   c645d057             | mov                 byte ptr [ebp - 0x30], 0x57
            //   c645d153             | mov                 byte ptr [ebp - 0x2f], 0x53
            //   c645d241             | mov                 byte ptr [ebp - 0x2e], 0x41
            //   c645d353             | mov                 byte ptr [ebp - 0x2d], 0x53

        $sequence_22 = { c645f477 c645f569 c645f66e c645f769 }
            // n = 4, score = 200
            //   c645f477             | mov                 byte ptr [ebp - 0xc], 0x77
            //   c645f569             | mov                 byte ptr [ebp - 0xb], 0x69
            //   c645f66e             | mov                 byte ptr [ebp - 0xa], 0x6e
            //   c645f769             | mov                 byte ptr [ebp - 9], 0x69

        $sequence_23 = { ff7604 ff36 e8???????? 8d9efc100000 53 e8???????? 59 }
            // n = 7, score = 200
            //   ff7604               | push                dword ptr [esi + 4]
            //   ff36                 | push                dword ptr [esi]
            //   e8????????           |                     
            //   8d9efc100000         | lea                 ebx, [esi + 0x10fc]
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_24 = { 50 57 8bce e8???????? 8d45c4 50 8d8528cbffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   57                   | push                edi
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8d45c4               | lea                 eax, [ebp - 0x3c]
            //   50                   | push                eax
            //   8d8528cbffff         | lea                 eax, [ebp - 0x34d8]

        $sequence_25 = { 83c104 3b4d14 7608 83c8ff }
            // n = 4, score = 200
            //   83c104               | add                 ecx, 4
            //   3b4d14               | cmp                 ecx, dword ptr [ebp + 0x14]
            //   7608                 | jbe                 0xa
            //   83c8ff               | or                  eax, 0xffffffff

        $sequence_26 = { 8b4df4 034df0 8b5508 0355ec 8a02 }
            // n = 5, score = 200
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   034df0               | add                 ecx, dword ptr [ebp - 0x10]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   0355ec               | add                 edx, dword ptr [ebp - 0x14]
            //   8a02                 | mov                 al, byte ptr [edx]

        $sequence_27 = { c645d577 c645d673 c645d720 c645d84e }
            // n = 4, score = 200
            //   c645d577             | mov                 byte ptr [ebp - 0x2b], 0x77
            //   c645d673             | mov                 byte ptr [ebp - 0x2a], 0x73
            //   c645d720             | mov                 byte ptr [ebp - 0x29], 0x20
            //   c645d84e             | mov                 byte ptr [ebp - 0x28], 0x4e

        $sequence_28 = { 8bca 33c0 8dbd29cbffff 889d28cbffff f3ab 66ab aa }
            // n = 7, score = 200
            //   8bca                 | mov                 ecx, edx
            //   33c0                 | xor                 eax, eax
            //   8dbd29cbffff         | lea                 edi, [ebp - 0x34d7]
            //   889d28cbffff         | mov                 byte ptr [ebp - 0x34d8], bl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al

        $sequence_29 = { 8b442444 53 55 8b6c2450 56 57 }
            // n = 6, score = 200
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   8b6c2450             | mov                 ebp, dword ptr [esp + 0x50]
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_30 = { 6a00 68???????? 6a00 6a00 6a00 51 68???????? }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   68????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   68????????           |                     

        $sequence_31 = { c645cf20 c645d057 c645d169 c645d26e c645d364 }
            // n = 5, score = 200
            //   c645cf20             | mov                 byte ptr [ebp - 0x31], 0x20
            //   c645d057             | mov                 byte ptr [ebp - 0x30], 0x57
            //   c645d169             | mov                 byte ptr [ebp - 0x2f], 0x69
            //   c645d26e             | mov                 byte ptr [ebp - 0x2e], 0x6e
            //   c645d364             | mov                 byte ptr [ebp - 0x2d], 0x64

        $sequence_32 = { c645c653 c645c749 c645c845 c645c920 }
            // n = 4, score = 200
            //   c645c653             | mov                 byte ptr [ebp - 0x3a], 0x53
            //   c645c749             | mov                 byte ptr [ebp - 0x39], 0x49
            //   c645c845             | mov                 byte ptr [ebp - 0x38], 0x45
            //   c645c920             | mov                 byte ptr [ebp - 0x37], 0x20

        $sequence_33 = { 8dbd29ebffff 889d28ebffff f3ab 66ab }
            // n = 4, score = 200
            //   8dbd29ebffff         | lea                 edi, [ebp - 0x14d7]
            //   889d28ebffff         | mov                 byte ptr [ebp - 0x14d8], bl
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax

        $sequence_34 = { 8b4d08 83c101 894d08 8b550c 83ea03 }
            // n = 5, score = 200
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   83c101               | add                 ecx, 1
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   83ea03               | sub                 edx, 3

        $sequence_35 = { 83c404 8bd1 c1e902 f3ab 8bca 83e103 }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   8bd1                 | mov                 edx, ecx
            //   c1e902               | shr                 ecx, 2
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8bca                 | mov                 ecx, edx
            //   83e103               | and                 ecx, 3

        $sequence_36 = { 52 e8???????? 83c404 e9???????? 6a05 }
            // n = 5, score = 200
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   e9????????           |                     
            //   6a05                 | push                5

        $sequence_37 = { c645c062 c645c16c c645c265 c645c33b }
            // n = 4, score = 200
            //   c645c062             | mov                 byte ptr [ebp - 0x40], 0x62
            //   c645c16c             | mov                 byte ptr [ebp - 0x3f], 0x6c
            //   c645c265             | mov                 byte ptr [ebp - 0x3e], 0x65
            //   c645c33b             | mov                 byte ptr [ebp - 0x3d], 0x3b

        $sequence_38 = { c685e3fdffffc2 c685e4fdffff5a c685e5fdffffc8 c685e6fdffff23 c685e7fdffff1b c685e8fdffffbc c685e9fdffff22 }
            // n = 7, score = 100
            //   c685e3fdffffc2       | mov                 byte ptr [ebp - 0x21d], 0xc2
            //   c685e4fdffff5a       | mov                 byte ptr [ebp - 0x21c], 0x5a
            //   c685e5fdffffc8       | mov                 byte ptr [ebp - 0x21b], 0xc8
            //   c685e6fdffff23       | mov                 byte ptr [ebp - 0x21a], 0x23
            //   c685e7fdffff1b       | mov                 byte ptr [ebp - 0x219], 0x1b
            //   c685e8fdffffbc       | mov                 byte ptr [ebp - 0x218], 0xbc
            //   c685e9fdffff22       | mov                 byte ptr [ebp - 0x217], 0x22

        $sequence_39 = { 8d95f0fcffff 8995ecf9ffff 8b85ecf9ffff 8985e8f9ffff 8b8decf9ffff 8a11 8895e7f9ffff }
            // n = 7, score = 100
            //   8d95f0fcffff         | lea                 edx, [ebp - 0x310]
            //   8995ecf9ffff         | mov                 dword ptr [ebp - 0x614], edx
            //   8b85ecf9ffff         | mov                 eax, dword ptr [ebp - 0x614]
            //   8985e8f9ffff         | mov                 dword ptr [ebp - 0x618], eax
            //   8b8decf9ffff         | mov                 ecx, dword ptr [ebp - 0x614]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   8895e7f9ffff         | mov                 byte ptr [ebp - 0x619], dl

    condition:
        7 of them and filesize < 450560
}
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