SYMBOLCOMMON_NAMEaka. SYNONYMS
win.seasalt (Back to overview)

SeaSalt

Actor(s): Comment Crew


There is no description at this point.

References
2018MandiantMandiant
@techreport{mandiant:2018:apt1:b76cc4d, author = {Mandiant}, title = {{APT1}}, date = {2018}, institution = {Mandiant}, url = {https://github.com/securitykitten/malware_references/blob/master/Appendix%20C%20(Digital)%20-%20The%20Malware%20Arsenal.pdf}, language = {English}, urldate = {2020-01-13} } APT1
Auriga Biscuit Bouncer Combos CookieBag Dairy GetMail GlooxMail Goggles Hacksfase Helauto Kurton ManItsMe MAPIget MiniASP NewsReels SeaSalt StarsyPound Sword TabMsgSQL Tarsip WebC2-AdSpace WebC2-Ausov WebC2-Bolid WebC2-Cson WebC2-DIV WebC2-GreenCat WebC2-Head WebC2-Kt3 WebC2-Qbp WebC2-Rave WebC2-Table WebC2-UGX WebC2-Yahoo
Yara Rules
[TLP:WHITE] win_seasalt_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_seasalt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.seasalt"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 68???????? 50 c745e4f4010000 ff15???????? 3bc6 }
            // n = 5, score = 100
            //   68????????           |                     
            //   50                   | push                eax
            //   c745e4f4010000       | mov                 dword ptr [ebp - 0x1c], 0x1f4
            //   ff15????????         |                     
            //   3bc6                 | cmp                 eax, esi

        $sequence_1 = { ff2485d0650010 834df0ff 8955cc 8955d8 8955e0 }
            // n = 5, score = 100
            //   ff2485d0650010       | jmp                 dword ptr [eax*4 + 0x100065d0]
            //   834df0ff             | or                  dword ptr [ebp - 0x10], 0xffffffff
            //   8955cc               | mov                 dword ptr [ebp - 0x34], edx
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx
            //   8955e0               | mov                 dword ptr [ebp - 0x20], edx

        $sequence_2 = { 68???????? 51 8975e0 8975e8 8975dc }
            // n = 5, score = 100
            //   68????????           |                     
            //   51                   | push                ecx
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi

        $sequence_3 = { 52 e8???????? 83c404 eba0 8b0d???????? 8d85e0feffff }
            // n = 6, score = 100
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   eba0                 | jmp                 0xffffffa2
            //   8b0d????????         |                     
            //   8d85e0feffff         | lea                 eax, [ebp - 0x120]

        $sequence_4 = { a3???????? 8b442408 48 7509 8b442404 a3???????? }
            // n = 6, score = 100
            //   a3????????           |                     
            //   8b442408             | mov                 eax, dword ptr [esp + 8]
            //   48                   | dec                 eax
            //   7509                 | jne                 0xb
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   a3????????           |                     

        $sequence_5 = { 40 3d00010000 7ced 6a00 8d54241c 6808010000 }
            // n = 6, score = 100
            //   40                   | inc                 eax
            //   3d00010000           | cmp                 eax, 0x100
            //   7ced                 | jl                  0xffffffef
            //   6a00                 | push                0
            //   8d54241c             | lea                 edx, [esp + 0x1c]
            //   6808010000           | push                0x108

        $sequence_6 = { 8dbc2419020000 c684241802000000 f3ab 66ab 6a00 }
            // n = 5, score = 100
            //   8dbc2419020000       | lea                 edi, [esp + 0x219]
            //   c684241802000000     | mov                 byte ptr [esp + 0x218], 0
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   6a00                 | push                0

        $sequence_7 = { 68???????? 50 ff15???????? 8dbdd8fdffff 83c9ff }
            // n = 5, score = 100
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8dbdd8fdffff         | lea                 edi, [ebp - 0x228]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_8 = { 6800010000 56 50 ff15???????? b980000000 33c0 }
            // n = 6, score = 100
            //   6800010000           | push                0x100
            //   56                   | push                esi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   b980000000           | mov                 ecx, 0x80
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 6a00 6a02 68???????? 52 ffd5 }
            // n = 5, score = 100
            //   6a00                 | push                0
            //   6a02                 | push                2
            //   68????????           |                     
            //   52                   | push                edx
            //   ffd5                 | call                ebp

    condition:
        7 of them and filesize < 139264
}
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