SYMBOLCOMMON_NAMEaka. SYNONYMS
win.hacksfase (Back to overview)

Hacksfase

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_hacksfase_auto (20230125 | Detects win.hacksfase.)
rule win_hacksfase_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.hacksfase."
        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.hacksfase"
        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 = { a1???????? 6a00 50 ff15???????? 85c0 0f84e3000000 }
            // n = 6, score = 100
            //   a1????????           |                     
            //   6a00                 | push                0
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f84e3000000         | je                  0xe9

        $sequence_1 = { a1???????? 8b4804 f681f4a4001006 743f 8b0d???????? 6a10 68???????? }
            // n = 7, score = 100
            //   a1????????           |                     
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   f681f4a4001006       | test                byte ptr [ecx + 0x1000a4f4], 6
            //   743f                 | je                  0x41
            //   8b0d????????         |                     
            //   6a10                 | push                0x10
            //   68????????           |                     

        $sequence_2 = { e8???????? 8b442418 8d4c2418 50 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   50                   | push                eax

        $sequence_3 = { 6a08 e8???????? 894628 8b4624 59 897dfc 8938 }
            // n = 7, score = 100
            //   6a08                 | push                8
            //   e8????????           |                     
            //   894628               | mov                 dword ptr [esi + 0x28], eax
            //   8b4624               | mov                 eax, dword ptr [esi + 0x24]
            //   59                   | pop                 ecx
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   8938                 | mov                 dword ptr [eax], edi

        $sequence_4 = { 5b 8be5 5d c20400 8b15???????? 52 }
            // n = 6, score = 100
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   8b15????????         |                     
            //   52                   | push                edx

        $sequence_5 = { 83c660 6a00 56 6a00 ff15???????? 85c0 0f852c010000 }
            // n = 7, score = 100
            //   83c660               | add                 esi, 0x60
            //   6a00                 | push                0
            //   56                   | push                esi
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f852c010000         | jne                 0x132

        $sequence_6 = { 85c0 0f84cc000000 8b15???????? 52 ffd5 c744241003000000 }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   0f84cc000000         | je                  0xd2
            //   8b15????????         |                     
            //   52                   | push                edx
            //   ffd5                 | call                ebp
            //   c744241003000000     | mov                 dword ptr [esp + 0x10], 3

        $sequence_7 = { 8d8424b4010000 8d8c24b0000000 50 51 8d5708 68???????? }
            // n = 6, score = 100
            //   8d8424b4010000       | lea                 eax, [esp + 0x1b4]
            //   8d8c24b0000000       | lea                 ecx, [esp + 0xb0]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8d5708               | lea                 edx, [edi + 8]
            //   68????????           |                     

        $sequence_8 = { 50 50 f3ab 8b5500 8d442418 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   50                   | push                eax
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8b5500               | mov                 edx, dword ptr [ebp]
            //   8d442418             | lea                 eax, [esp + 0x18]

        $sequence_9 = { 8b4628 8d55d4 52 8d55dc }
            // n = 4, score = 100
            //   8b4628               | mov                 eax, dword ptr [esi + 0x28]
            //   8d55d4               | lea                 edx, [ebp - 0x2c]
            //   52                   | push                edx
            //   8d55dc               | lea                 edx, [ebp - 0x24]

    condition:
        7 of them and filesize < 106496
}
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