SYMBOLCOMMON_NAMEaka. SYNONYMS
win.wmighost (Back to overview)

WMI Ghost

aka: Wimmie, Syndicasec

Actor(s): Thrip


There is no description at this point.

References
2018-06-19SymantecSecurity Response Attack Investigation Team
@online{team:20180619:thrip:4662184, author = {Security Response Attack Investigation Team}, title = {{Thrip: Espionage Group Hits Satellite, Telecoms, and Defense Companies}}, date = {2018-06-19}, organization = {Symantec}, url = {https://www.symantec.com/blogs/threat-intelligence/thrip-hits-satellite-telecoms-defense-targets}, language = {English}, urldate = {2020-01-09} } Thrip: Espionage Group Hits Satellite, Telecoms, and Defense Companies
Catchamas Rikamanu Spedear WMI Ghost Thrip
2017-07-17Secrary BlogLasha Khasaia
@online{khasaia:20170717:wmighost:20b59d3, author = {Lasha Khasaia}, title = {{WMIGhost / Wimmie - WMI malware}}, date = {2017-07-17}, organization = {Secrary Blog}, url = {https://secrary.com/ReversingMalware/WMIGhost/}, language = {English}, urldate = {2019-12-24} } WMIGhost / Wimmie - WMI malware
WMI Ghost
Yara Rules
[TLP:WHITE] win_wmighost_auto (20221125 | Detects win.wmighost.)
rule win_wmighost_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.wmighost."
        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.wmighost"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 8d85f4fdffff 50 8b4d08 51 ff15???????? 8d95fcfeffff }
            // n = 6, score = 100
            //   8d85f4fdffff         | lea                 eax, [ebp - 0x20c]
            //   50                   | push                eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d95fcfeffff         | lea                 edx, [ebp - 0x104]

        $sequence_1 = { 8d8df0fcffff 51 68???????? 8b95f8feffff 52 ff15???????? 83c410 }
            // n = 7, score = 100
            //   8d8df0fcffff         | lea                 ecx, [ebp - 0x310]
            //   51                   | push                ecx
            //   68????????           |                     
            //   8b95f8feffff         | mov                 edx, dword ptr [ebp - 0x108]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   83c410               | add                 esp, 0x10

        $sequence_2 = { 894dec c745fc00000000 8d4d08 e8???????? 50 8b45ec 8b08 }
            // n = 7, score = 100
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   e8????????           |                     
            //   50                   | push                eax
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_3 = { 6804010000 ff15???????? 83c404 8985f8feffff 6804010000 6a00 }
            // n = 6, score = 100
            //   6804010000           | push                0x104
            //   ff15????????         |                     
            //   83c404               | add                 esp, 4
            //   8985f8feffff         | mov                 dword ptr [ebp - 0x108], eax
            //   6804010000           | push                0x104
            //   6a00                 | push                0

        $sequence_4 = { 8b08 8b55ec 52 ff5120 8945f0 }
            // n = 5, score = 100
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   52                   | push                edx
            //   ff5120               | call                dword ptr [ecx + 0x20]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax

        $sequence_5 = { 8945fc 837dfcff 7505 e9???????? 6a02 6a00 }
            // n = 6, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   837dfcff             | cmp                 dword ptr [ebp - 4], -1
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   6a02                 | push                2
            //   6a00                 | push                0

        $sequence_6 = { aa c685f0fcffff00 b940000000 33c0 8dbdf1fcffff f3ab }
            // n = 6, score = 100
            //   aa                   | stosb               byte ptr es:[edi], al
            //   c685f0fcffff00       | mov                 byte ptr [ebp - 0x310], 0
            //   b940000000           | mov                 ecx, 0x40
            //   33c0                 | xor                 eax, eax
            //   8dbdf1fcffff         | lea                 edi, [ebp - 0x30f]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_7 = { 8d958caeffff 52 e8???????? 83c404 }
            // n = 4, score = 100
            //   8d958caeffff         | lea                 edx, [ebp - 0x5174]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_8 = { 52 ff5120 8945f0 837df000 7d12 }
            // n = 5, score = 100
            //   52                   | push                edx
            //   ff5120               | call                dword ptr [ecx + 0x20]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   7d12                 | jge                 0x14

        $sequence_9 = { 8b4510 50 8d8df0fcffff 51 68???????? }
            // n = 5, score = 100
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   50                   | push                eax
            //   8d8df0fcffff         | lea                 ecx, [ebp - 0x310]
            //   51                   | push                ecx
            //   68????????           |                     

    condition:
        7 of them and filesize < 49152
}
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