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 (20211008 | Detects win.w32times.)
rule win_w32times_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-10-07"
        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 = "20211007"
        malpedia_hash = "e5b790e0f888f252d49063a1251ca60ec2832535"
        malpedia_version = "20211008"
        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 = { 43 f2ae f7d1 49 83f920 730c }
            // n = 6, score = 200
            //   43                   | inc                 ebx
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   83f920               | cmp                 ecx, 0x20
            //   730c                 | jae                 0xe

        $sequence_1 = { f7d1 49 51 8d4c2418 68???????? }
            // n = 5, score = 200
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   51                   | push                ecx
            //   8d4c2418             | lea                 ecx, dword ptr [esp + 0x18]
            //   68????????           |                     

        $sequence_2 = { 81c4ec0c0000 c3 68???????? ffd7 }
            // n = 4, score = 200
            //   81c4ec0c0000         | add                 esp, 0xcec
            //   c3                   | ret                 
            //   68????????           |                     
            //   ffd7                 | call                edi

        $sequence_3 = { 803800 7402 8be8 8d8424ec010000 8d4c241c 8944241c 6804010000 }
            // n = 7, score = 200
            //   803800               | cmp                 byte ptr [eax], 0
            //   7402                 | je                  4
            //   8be8                 | mov                 ebp, eax
            //   8d8424ec010000       | lea                 eax, dword ptr [esp + 0x1ec]
            //   8d4c241c             | lea                 ecx, dword ptr [esp + 0x1c]
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   6804010000           | push                0x104

        $sequence_4 = { 83e103 f3a4 b982000000 bf???????? f3ab 8d8424ec000000 }
            // n = 6, score = 200
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   b982000000           | mov                 ecx, 0x82
            //   bf????????           |                     
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8d8424ec000000       | lea                 eax, dword ptr [esp + 0xec]

        $sequence_5 = { 68???????? ffd6 bf02000000 68???????? }
            // n = 4, score = 200
            //   68????????           |                     
            //   ffd6                 | call                esi
            //   bf02000000           | mov                 edi, 2
            //   68????????           |                     

        $sequence_6 = { 8bd8 ffd7 56 ffd7 53 ff15???????? }
            // n = 6, score = 200
            //   8bd8                 | mov                 ebx, eax
            //   ffd7                 | call                edi
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   53                   | push                ebx
            //   ff15????????         |                     

        $sequence_7 = { 8d4c2410 51 6a01 57 ff15???????? 85c0 7471 }
            // n = 7, score = 200
            //   8d4c2410             | lea                 ecx, dword ptr [esp + 0x10]
            //   51                   | push                ecx
            //   6a01                 | push                1
            //   57                   | push                edi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7471                 | je                  0x73

        $sequence_8 = { b941000000 bf???????? f3ab b941000000 8dbc24f8050000 }
            // n = 5, score = 200
            //   b941000000           | mov                 ecx, 0x41
            //   bf????????           |                     
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   b941000000           | mov                 ecx, 0x41
            //   8dbc24f8050000       | lea                 edi, dword ptr [esp + 0x5f8]

        $sequence_9 = { 8b9c243c060000 f3ab b941000000 8dbc241c020000 8bac2438060000 f3ab }
            // n = 6, score = 200
            //   8b9c243c060000       | mov                 ebx, dword ptr [esp + 0x63c]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   b941000000           | mov                 ecx, 0x41
            //   8dbc241c020000       | lea                 edi, dword ptr [esp + 0x21c]
            //   8bac2438060000       | mov                 ebp, dword ptr [esp + 0x638]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

    condition:
        7 of them and filesize < 122880
}
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