TT Malware Log

マルウェア / サイバー攻撃 / 解析技術 に関する「個人」の調査・研究・参照ログ

Adhubllka (まとめ)

【辞書】

◆Adhubllka (Malpedia)
https://malpedia.caad.fkie.fraunhofer.de/details/win.adhubllka


【ニュース】

◆The Week in Ransomware - October 16th 2020 - The weekend is upon us (BleepingComputer, 2020/10/16 19:13)
https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-october-16th-2020-the-weekend-is-upon-us/
https://malware-log.hatenablog.com/entry/2020/10/16/000000_1


【ブログ】

◆TA547 Pivots from Ursnif Banking Trojan to Ransomware in Australian Campaign (Proofpoint, 2020/07/17)
https://www.proofpoint.com/us/blog/security-briefs/ta547-pivots-ursnif-banking-trojan-ransomware-australian-campaign


【関連情報】

◆TA547 (まとめ)
https://malware-log.hatenablog.com/entry/TA547


【関連まとめ記事】

全体まとめ
 ◆マルウェア / Malware (まとめ)

◆ランサムウェア (まとめ)
https://malware-log.hatenablog.com/entry/Ransomware


【Yara Rule】

rule win_adhubllka_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.adhubllka"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 660fd4d1 0f2805???????? 0f29a550ffffff 660fd4c1 0f28e2 0f29b5f0feffff 660f62e0 }
            // n = 7, score = 400
            //   660fd4d1             | paddq               xmm2, xmm1
            //   0f2805????????       |                     
            //   0f29a550ffffff       | movaps              xmmword ptr [ebp - 0xb0], xmm4
            //   660fd4c1             | paddq               xmm0, xmm1
            //   0f28e2               | movaps              xmm4, xmm2
            //   0f29b5f0feffff       | movaps              xmmword ptr [ebp - 0x110], xmm6
            //   660f62e0             | punpckldq           xmm4, xmm0

        $sequence_1 = { 890e 8b4dac 2b4e08 894604 8b45b0 1b460c 894e08 }
            // n = 7, score = 400
            //   890e                 | mov                 dword ptr [esi], ecx
            //   8b4dac               | mov                 ecx, dword ptr [ebp - 0x54]
            //   2b4e08               | sub                 ecx, dword ptr [esi + 8]
            //   894604               | mov                 dword ptr [esi + 4], eax
            //   8b45b0               | mov                 eax, dword ptr [ebp - 0x50]
            //   1b460c               | sbb                 eax, dword ptr [esi + 0xc]
            //   894e08               | mov                 dword ptr [esi + 8], ecx

        $sequence_2 = { 0f108568feffff 0f118578fdffff e8???????? 8d8d28feffff e8???????? 8d8d28feffff e8???????? }
            // n = 7, score = 400
            //   0f108568feffff       | movups              xmm0, xmmword ptr [ebp - 0x198]
            //   0f118578fdffff       | movups              xmmword ptr [ebp - 0x288], xmm0
            //   e8????????           |                     
            //   8d8d28feffff         | lea                 ecx, [ebp - 0x1d8]
            //   e8????????           |                     
            //   8d8d28feffff         | lea                 ecx, [ebp - 0x1d8]
            //   e8????????           |                     

        $sequence_3 = { 83c120 0fb617 46 8d42bf 83f819 7703 83c220 }
            // n = 7, score = 400
            //   83c120               | add                 ecx, 0x20
            //   0fb617               | movzx               edx, byte ptr [edi]
            //   46                   | inc                 esi
            //   8d42bf               | lea                 eax, [edx - 0x41]
            //   83f819               | cmp                 eax, 0x19
            //   7703                 | ja                  5
            //   83c220               | add                 edx, 0x20

        $sequence_4 = { 8b7df0 660ffe6580 660fefc8 8345f010 0f28d4 }
            // n = 5, score = 400
            //   8b7df0               | mov                 edi, dword ptr [ebp - 0x10]
            //   660ffe6580           | paddd               xmm4, xmmword ptr [ebp - 0x80]
            //   660fefc8             | pxor                xmm1, xmm0
            //   8345f010             | add                 dword ptr [ebp - 0x10], 0x10
            //   0f28d4               | movaps              xmm2, xmm4

        $sequence_5 = { 8bb5a0fdffff 8d85a4fdffff 50 ffb58cfdffff ff15???????? }
            // n = 5, score = 400
            //   8bb5a0fdffff         | mov                 esi, dword ptr [ebp - 0x260]
            //   8d85a4fdffff         | lea                 eax, [ebp - 0x25c]
            //   50                   | push                eax
            //   ffb58cfdffff         | push                dword ptr [ebp - 0x274]
            //   ff15????????         |                     

        $sequence_6 = { 894818 89701c 0fb6470f 99 8bc8 8bf2 0fb6470e }
            // n = 7, score = 400
            //   894818               | mov                 dword ptr [eax + 0x18], ecx
            //   89701c               | mov                 dword ptr [eax + 0x1c], esi
            //   0fb6470f             | movzx               eax, byte ptr [edi + 0xf]
            //   99                   | cdq                 
            //   8bc8                 | mov                 ecx, eax
            //   8bf2                 | mov                 esi, edx
            //   0fb6470e             | movzx               eax, byte ptr [edi + 0xe]

        $sequence_7 = { 0f104590 0f1185f0feffff 0f1045a0 0f118500ffffff 0f1f00 }
            // n = 5, score = 400
            //   0f104590             | movups              xmm0, xmmword ptr [ebp - 0x70]
            //   0f1185f0feffff       | movups              xmmword ptr [ebp - 0x110], xmm0
            //   0f1045a0             | movups              xmm0, xmmword ptr [ebp - 0x60]
            //   0f118500ffffff       | movups              xmmword ptr [ebp - 0x100], xmm0
            //   0f1f00               | nop                 dword ptr [eax]

        $sequence_8 = { 660fefd3 660fefc8 0f110c01 0f11540110 0f104c1020 0f105c1030 0f104620 }
            // n = 7, score = 400
            //   660fefd3             | pxor                xmm2, xmm3
            //   660fefc8             | pxor                xmm1, xmm0
            //   0f110c01             | movups              xmmword ptr [ecx + eax], xmm1
            //   0f11540110           | movups              xmmword ptr [ecx + eax + 0x10], xmm2
            //   0f104c1020           | movups              xmm1, xmmword ptr [eax + edx + 0x20]
            //   0f105c1030           | movups              xmm3, xmmword ptr [eax + edx + 0x30]
            //   0f104620             | movups              xmm0, xmmword ptr [esi + 0x20]

        $sequence_9 = { 83e805 7415 83e801 0f8595010000 c745e4e8724100 e9???????? }
            // n = 6, score = 400
            //   83e805               | sub                 eax, 5
            //   7415                 | je                  0x17
            //   83e801               | sub                 eax, 1
            //   0f8595010000         | jne                 0x19b
            //   c745e4e8724100       | mov                 dword ptr [ebp - 0x1c], 0x4172e8
            //   e9????????           |                     

    condition:
        7 of them and filesize < 253952
}

出典: https://malpedia.caad.fkie.fraunhofer.de/details/win.adhubllka


Copyright (C) 谷川哲司 (Tetsuji Tanigawa) 1997 - 2020