SYMBOLCOMMON_NAMEaka. SYNONYMS
win.w32times (Back to overview)

w32times

Actor(s): UPS


There is no description at this point.

References
2017-05-31MITRE ATT&CKVarious
@online{various:20170531:apt3:178e308, author = {Various}, title = {{Group Description: APT3}}, date = {2017-05-31}, organization = {MITRE ATT&CK}, url = {https://attack.mitre.org/wiki/Group/G0022}, language = {English}, urldate = {2020-01-09} } Group Description: APT3
w32times
Yara Rules
[TLP:WHITE] win_w32times_auto (20230125 | Detects win.w32times.)
rule win_w32times_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.w32times."
        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.w32times"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 33d7 25fcfcfcfc 81e2cfcfcfcf 8ad8 8acc c1ca04 8bab58714000 }
            // n = 7, score = 200
            //   33d7                 | xor                 edx, edi
            //   25fcfcfcfc           | and                 eax, 0xfcfcfcfc
            //   81e2cfcfcfcf         | and                 edx, 0xcfcfcfcf
            //   8ad8                 | mov                 bl, al
            //   8acc                 | mov                 cl, ah
            //   c1ca04               | ror                 edx, 4
            //   8bab58714000         | mov                 ebp, dword ptr [ebx + 0x407158]

        $sequence_1 = { 50 ffd6 83c40c 85c0 7541 8b7504 83c504 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7541                 | jne                 0x43
            //   8b7504               | mov                 esi, dword ptr [ebp + 4]
            //   83c504               | add                 ebp, 4

        $sequence_2 = { 81c46c010000 c3 8b4c2408 83ec10 8d442400 56 57 }
            // n = 7, score = 200
            //   81c46c010000         | add                 esp, 0x16c
            //   c3                   | ret                 
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   83ec10               | sub                 esp, 0x10
            //   8d442400             | lea                 eax, [esp]
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_3 = { c1ee04 c1e210 0bf2 2500ff0000 0bf0 }
            // n = 5, score = 200
            //   c1ee04               | shr                 esi, 4
            //   c1e210               | shl                 edx, 0x10
            //   0bf2                 | or                  esi, edx
            //   2500ff0000           | and                 eax, 0xff00
            //   0bf0                 | or                  esi, eax

        $sequence_4 = { 895c2414 f3ab 55 ff15???????? b909000000 8bf3 }
            // n = 6, score = 200
            //   895c2414             | mov                 dword ptr [esp + 0x14], ebx
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   55                   | push                ebp
            //   ff15????????         |                     
            //   b909000000           | mov                 ecx, 9
            //   8bf3                 | mov                 esi, ebx

        $sequence_5 = { 6a00 8d4c2448 6a02 51 }
            // n = 4, score = 200
            //   6a00                 | push                0
            //   8d4c2448             | lea                 ecx, [esp + 0x48]
            //   6a02                 | push                2
            //   51                   | push                ecx

        $sequence_6 = { 8b9958784000 33f3 8b9858754000 33f3 8b9a58764000 33f3 8b4520 }
            // n = 7, score = 200
            //   8b9958784000         | mov                 ebx, dword ptr [ecx + 0x407858]
            //   33f3                 | xor                 esi, ebx
            //   8b9858754000         | mov                 ebx, dword ptr [eax + 0x407558]
            //   33f3                 | xor                 esi, ebx
            //   8b9a58764000         | mov                 ebx, dword ptr [edx + 0x407658]
            //   33f3                 | xor                 esi, ebx
            //   8b4520               | mov                 eax, dword ptr [ebp + 0x20]

        $sequence_7 = { 740a 683f000f00 6a00 56 eb09 683f000f00 6a00 }
            // n = 7, score = 200
            //   740a                 | je                  0xc
            //   683f000f00           | push                0xf003f
            //   6a00                 | push                0
            //   56                   | push                esi
            //   eb09                 | jmp                 0xb
            //   683f000f00           | push                0xf003f
            //   6a00                 | push                0

        $sequence_8 = { 8b35???????? 53 ffd6 55 ffd6 68c8000000 ff15???????? }
            // n = 7, score = 200
            //   8b35????????         |                     
            //   53                   | push                ebx
            //   ffd6                 | call                esi
            //   55                   | push                ebp
            //   ffd6                 | call                esi
            //   68c8000000           | push                0xc8
            //   ff15????????         |                     

        $sequence_9 = { 48 89442414 75d4 5e }
            // n = 4, score = 200
            //   48                   | dec                 eax
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   75d4                 | jne                 0xffffffd6
            //   5e                   | pop                 esi

    condition:
        7 of them and filesize < 122880
}
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