SYMBOLCOMMON_NAMEaka. SYNONYMS
win.tarsip (Back to overview)

Tarsip

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_tarsip_auto (20220411 | Detects win.tarsip.)
rule win_tarsip_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.tarsip."
        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.tarsip"
        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 = { e8???????? 6a04 68???????? 8d442420 e8???????? 6a01 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   6a04                 | push                4
            //   68????????           |                     
            //   8d442420             | lea                 eax, dword ptr [esp + 0x20]
            //   e8????????           |                     
            //   6a01                 | push                1

        $sequence_1 = { e8???????? 8bf0 83c408 3bf3 0f85f1000000 8d9424cc010000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   3bf3                 | cmp                 esi, ebx
            //   0f85f1000000         | jne                 0xf7
            //   8d9424cc010000       | lea                 edx, dword ptr [esp + 0x1cc]

        $sequence_2 = { 6a00 68???????? 8bcb e8???????? 8b4334 8b6b1c }
            // n = 6, score = 100
            //   6a00                 | push                0
            //   68????????           |                     
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   8b4334               | mov                 eax, dword ptr [ebx + 0x34]
            //   8b6b1c               | mov                 ebp, dword ptr [ebx + 0x1c]

        $sequence_3 = { 83c40c 8d94248c8e0000 52 8d8c2490b60000 e8???????? }
            // n = 5, score = 100
            //   83c40c               | add                 esp, 0xc
            //   8d94248c8e0000       | lea                 edx, dword ptr [esp + 0x8e8c]
            //   52                   | push                edx
            //   8d8c2490b60000       | lea                 ecx, dword ptr [esp + 0xb690]
            //   e8????????           |                     

        $sequence_4 = { c1fb03 8d2c33 0fb65ffb 83e107 d2e3 8d4802 83c004 }
            // n = 7, score = 100
            //   c1fb03               | sar                 ebx, 3
            //   8d2c33               | lea                 ebp, dword ptr [ebx + esi]
            //   0fb65ffb             | movzx               ebx, byte ptr [edi - 5]
            //   83e107               | and                 ecx, 7
            //   d2e3                 | shl                 bl, cl
            //   8d4802               | lea                 ecx, dword ptr [eax + 2]
            //   83c004               | add                 eax, 4

        $sequence_5 = { 80e107 d2fa 40 80e201 83f840 }
            // n = 5, score = 100
            //   80e107               | and                 cl, 7
            //   d2fa                 | sar                 dl, cl
            //   40                   | inc                 eax
            //   80e201               | and                 dl, 1
            //   83f840               | cmp                 eax, 0x40

        $sequence_6 = { 6a01 52 e8???????? 55 8bf0 e8???????? 83c414 }
            // n = 7, score = 100
            //   6a01                 | push                1
            //   52                   | push                edx
            //   e8????????           |                     
            //   55                   | push                ebp
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14

        $sequence_7 = { 8903 55 e8???????? 8b8c2440280000 83c404 5f 5e }
            // n = 7, score = 100
            //   8903                 | mov                 dword ptr [ebx], eax
            //   55                   | push                ebp
            //   e8????????           |                     
            //   8b8c2440280000       | mov                 ecx, dword ptr [esp + 0x2840]
            //   83c404               | add                 esp, 4
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_8 = { 53 53 6aff 8d8c24b0030000 51 53 53 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   6aff                 | push                -1
            //   8d8c24b0030000       | lea                 ecx, dword ptr [esp + 0x3b0]
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_9 = { e8???????? 6603f8 0fb7d7 0fb78456907e0000 b973020000 668bf8 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   6603f8               | add                 di, ax
            //   0fb7d7               | movzx               edx, di
            //   0fb78456907e0000     | movzx               eax, word ptr [esi + edx*2 + 0x7e90]
            //   b973020000           | mov                 ecx, 0x273
            //   668bf8               | mov                 di, ax

    condition:
        7 of them and filesize < 360448
}
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