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 (20220411 | Detects win.w32times.)
rule win_w32times_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { ffd6 8b942450060000 83c9ff 8bfa 33c0 f2ae f7d1 }
            // n = 7, score = 200
            //   ffd6                 | call                esi
            //   8b942450060000       | mov                 edx, dword ptr [esp + 0x650]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   8bfa                 | mov                 edi, edx
            //   33c0                 | xor                 eax, eax
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx

        $sequence_1 = { 8dbc2418010000 f3ab 8b7d00 8bcb 8bd1 }
            // n = 5, score = 200
            //   8dbc2418010000       | lea                 edi, dword ptr [esp + 0x118]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b7d00               | mov                 edi, dword ptr [ebp]
            //   8bcb                 | mov                 ecx, ebx
            //   8bd1                 | mov                 edx, ecx

        $sequence_2 = { ffd3 8b4c2414 51 ffd3 eb0e }
            // n = 5, score = 200
            //   ffd3                 | call                ebx
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   51                   | push                ecx
            //   ffd3                 | call                ebx
            //   eb0e                 | jmp                 0x10

        $sequence_3 = { f3a5 8bcd 83e103 f3a4 8dbc24f0020000 }
            // n = 5, score = 200
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bcd                 | mov                 ecx, ebp
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8dbc24f0020000       | lea                 edi, dword ptr [esp + 0x2f0]

        $sequence_4 = { 2bc5 7437 48 742d 2d01010000 74e3 }
            // n = 6, score = 200
            //   2bc5                 | sub                 eax, ebp
            //   7437                 | je                  0x39
            //   48                   | dec                 eax
            //   742d                 | je                  0x2f
            //   2d01010000           | sub                 eax, 0x101
            //   74e3                 | je                  0xffffffe5

        $sequence_5 = { 51 ff15???????? 8dbc2428010000 83c9ff }
            // n = 4, score = 200
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8dbc2428010000       | lea                 edi, dword ptr [esp + 0x128]
            //   83c9ff               | or                  ecx, 0xffffffff

        $sequence_6 = { c1e902 f3a5 8bc8 83e103 f3a4 8b35???????? 8d4c2420 }
            // n = 7, score = 200
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bc8                 | mov                 ecx, eax
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b35????????         |                     
            //   8d4c2420             | lea                 ecx, dword ptr [esp + 0x20]

        $sequence_7 = { 8bcd 83e103 f3a4 8dbc24ec010000 83c9ff f2ae }
            // n = 6, score = 200
            //   8bcd                 | mov                 ecx, ebp
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8dbc24ec010000       | lea                 edi, dword ptr [esp + 0x1ec]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_8 = { bf???????? 83c9ff 33c0 8d5c2420 f2ae }
            // n = 5, score = 200
            //   bf????????           |                     
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   8d5c2420             | lea                 ebx, dword ptr [esp + 0x20]
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_9 = { ff15???????? 8944242c 8bf8 8b442434 8b4c2430 85c0 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax
            //   8bf8                 | mov                 edi, eax
            //   8b442434             | mov                 eax, dword ptr [esp + 0x34]
            //   8b4c2430             | mov                 ecx, dword ptr [esp + 0x30]
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 122880
}
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