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 (20220411 | Detects win.hacksfase.)
rule win_hacksfase_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "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 = { 8b0d???????? 8b4904 81c1???????? 8b4104 8b5128 0bc6 85d2 }
            // n = 7, score = 100
            //   8b0d????????         |                     
            //   8b4904               | mov                 ecx, dword ptr [ecx + 4]
            //   81c1????????         |                     
            //   8b4104               | mov                 eax, dword ptr [ecx + 4]
            //   8b5128               | mov                 edx, dword ptr [ecx + 0x28]
            //   0bc6                 | or                  eax, esi
            //   85d2                 | test                edx, edx

        $sequence_1 = { 53 ffd0 59 e9???????? 837de405 0f85f6010000 8b450c }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   ffd0                 | call                eax
            //   59                   | pop                 ecx
            //   e9????????           |                     
            //   837de405             | cmp                 dword ptr [ebp - 0x1c], 5
            //   0f85f6010000         | jne                 0x1fc
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]

        $sequence_2 = { c705????????01000000 50 c705????????7b14ae47 c705????????e17a843f }
            // n = 4, score = 100
            //   c705????????01000000     |     
            //   50                   | push                eax
            //   c705????????7b14ae47     |     
            //   c705????????e17a843f     |     

        $sequence_3 = { 8bec 83ec28 53 56 57 68???????? ff7508 }
            // n = 7, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec28               | sub                 esp, 0x28
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   68????????           |                     
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_4 = { c7470402000000 eb0b 8b4510 897008 8930 897004 80631400 }
            // n = 7, score = 100
            //   c7470402000000       | mov                 dword ptr [edi + 4], 2
            //   eb0b                 | jmp                 0xd
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   897008               | mov                 dword ptr [eax + 8], esi
            //   8930                 | mov                 dword ptr [eax], esi
            //   897004               | mov                 dword ptr [eax + 4], esi
            //   80631400             | and                 byte ptr [ebx + 0x14], 0

        $sequence_5 = { 51 6a04 89542430 89442434 ff15???????? 83f803 777b }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   6a04                 | push                4
            //   89542430             | mov                 dword ptr [esp + 0x30], edx
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   ff15????????         |                     
            //   83f803               | cmp                 eax, 3
            //   777b                 | ja                  0x7d

        $sequence_6 = { 8b15???????? 56 56 8d4c2430 c68424cc22000003 89542430 }
            // n = 6, score = 100
            //   8b15????????         |                     
            //   56                   | push                esi
            //   56                   | push                esi
            //   8d4c2430             | lea                 ecx, dword ptr [esp + 0x30]
            //   c68424cc22000003     | mov                 byte ptr [esp + 0x22cc], 3
            //   89542430             | mov                 dword ptr [esp + 0x30], edx

        $sequence_7 = { b8???????? 85c0 0f850d040000 8b0d???????? }
            // n = 4, score = 100
            //   b8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f850d040000         | jne                 0x413
            //   8b0d????????         |                     

        $sequence_8 = { 732a 85c0 750c b8cdcccccc }
            // n = 4, score = 100
            //   732a                 | jae                 0x2c
            //   85c0                 | test                eax, eax
            //   750c                 | jne                 0xe
            //   b8cdcccccc           | mov                 eax, 0xcccccccd

        $sequence_9 = { 5f c3 55 8bec 51 8a4108 8365fc00 }
            // n = 7, score = 100
            //   5f                   | pop                 edi
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   8a4108               | mov                 al, byte ptr [ecx + 8]
            //   8365fc00             | and                 dword ptr [ebp - 4], 0

    condition:
        7 of them and filesize < 106496
}
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