SYMBOLCOMMON_NAMEaka. SYNONYMS
win.getmail (Back to overview)

GetMail

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_getmail_auto (20220411 | Detects win.getmail.)
rule win_getmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.getmail."
        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.getmail"
        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 = { 0f84d2070000 391d???????? 0f84c6070000 391d???????? 0f84ba070000 3bc3 0f84b2070000 }
            // n = 7, score = 100
            //   0f84d2070000         | je                  0x7d8
            //   391d????????         |                     
            //   0f84c6070000         | je                  0x7cc
            //   391d????????         |                     
            //   0f84ba070000         | je                  0x7c0
            //   3bc3                 | cmp                 eax, ebx
            //   0f84b2070000         | je                  0x7b8

        $sequence_1 = { 3bde 0f83bafeffff 83c309 e9???????? 8a03 3c0d }
            // n = 6, score = 100
            //   3bde                 | cmp                 ebx, esi
            //   0f83bafeffff         | jae                 0xfffffec0
            //   83c309               | add                 ebx, 9
            //   e9????????           |                     
            //   8a03                 | mov                 al, byte ptr [ebx]
            //   3c0d                 | cmp                 al, 0xd

        $sequence_2 = { 8900 894004 8b4c241c 8d542424 51 52 }
            // n = 6, score = 100
            //   8900                 | mov                 dword ptr [eax], eax
            //   894004               | mov                 dword ptr [eax + 4], eax
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]
            //   8d542424             | lea                 edx, dword ptr [esp + 0x24]
            //   51                   | push                ecx
            //   52                   | push                edx

        $sequence_3 = { 7459 8b35???????? 85f6 744f 8b35???????? 85f6 }
            // n = 6, score = 100
            //   7459                 | je                  0x5b
            //   8b35????????         |                     
            //   85f6                 | test                esi, esi
            //   744f                 | je                  0x51
            //   8b35????????         |                     
            //   85f6                 | test                esi, esi

        $sequence_4 = { 7304 3910 75f5 8d0c49 5e 8d0c8d88434100 3bc1 }
            // n = 7, score = 100
            //   7304                 | jae                 6
            //   3910                 | cmp                 dword ptr [eax], edx
            //   75f5                 | jne                 0xfffffff7
            //   8d0c49               | lea                 ecx, dword ptr [ecx + ecx*2]
            //   5e                   | pop                 esi
            //   8d0c8d88434100       | lea                 ecx, dword ptr [ecx*4 + 0x414388]
            //   3bc1                 | cmp                 eax, ecx

        $sequence_5 = { 5b 8a4220 884520 8b4c2410 5f 5d 64890d00000000 }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   8a4220               | mov                 al, byte ptr [edx + 0x20]
            //   884520               | mov                 byte ptr [ebp + 0x20], al
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_6 = { 53 55 56 57 8b7c2418 8bd9 6a2c }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7c2418             | mov                 edi, dword ptr [esp + 0x18]
            //   8bd9                 | mov                 ebx, ecx
            //   6a2c                 | push                0x2c

        $sequence_7 = { 8b442410 64892500000000 81eca8010000 8d542438 }
            // n = 4, score = 100
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   64892500000000       | mov                 dword ptr fs:[0], esp
            //   81eca8010000         | sub                 esp, 0x1a8
            //   8d542438             | lea                 edx, dword ptr [esp + 0x38]

        $sequence_8 = { 89b4248c000000 89b42490000000 eb02 33f6 }
            // n = 4, score = 100
            //   89b4248c000000       | mov                 dword ptr [esp + 0x8c], esi
            //   89b42490000000       | mov                 dword ptr [esp + 0x90], esi
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi

        $sequence_9 = { 8d54246c 51 52 c78424ec01000000000000 e8???????? 83c420 }
            // n = 6, score = 100
            //   8d54246c             | lea                 edx, dword ptr [esp + 0x6c]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   c78424ec01000000000000     | mov    dword ptr [esp + 0x1ec], 0
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20

    condition:
        7 of them and filesize < 188416
}
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