SYMBOLCOMMON_NAMEaka. SYNONYMS
win.snatchcrypto (Back to overview)

SnatchCrypto

Actor(s): Lazarus Group


Malware observed in the SnatchCrypto campaign, attributed by Kaspersky Labs to BlueNoroff with high confidence.

References
2022-01-13Kaspersky LabsSeongsu Park, Vitaly Kamluk
@online{park:20220113:bluenoroff:a3ce5e4, author = {Seongsu Park and Vitaly Kamluk}, title = {{The BlueNoroff cryptocurrency hunt is still on}}, date = {2022-01-13}, organization = {Kaspersky Labs}, url = {https://securelist.com/the-bluenoroff-cryptocurrency-hunt-is-still-on/105488/}, language = {English}, urldate = {2022-01-17} } The BlueNoroff cryptocurrency hunt is still on
SnatchCrypto
2019-11-21ThreatBookThreatBook
@techreport{threatbook:20191121:nightmare:f88dec3, author = {ThreatBook}, title = {{The Nightmare of Global Cryptocurrency Companies -Demystifying the “DangerousPassword” of the APT Organization}}, date = {2019-11-21}, institution = {ThreatBook}, url = {https://threatbook.cn/ppt/The%2520Nightmare%2520of%2520Global%2520Cryptocurrency%2520Companies%2520-%2520Demystifying%2520the%2520%25E2%2580%259CDangerousPassword%25E2%2580%259D%2520of%2520the%2520APT%2520Organization.pdf}, language = {English}, urldate = {2022-08-12} } The Nightmare of Global Cryptocurrency Companies -Demystifying the “DangerousPassword” of the APT Organization
SnatchCrypto
Yara Rules
[TLP:WHITE] win_snatchcrypto_auto (20220808 | Detects win.snatchcrypto.)
rule win_snatchcrypto_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.snatchcrypto."
        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.snatchcrypto"
        malpedia_rule_date = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 488bcf 89442420 e8???????? 8bd8 33ff 85db 740f }
            // n = 7, score = 200
            //   488bcf               | dec                 eax
            //   89442420             | mov                 dword ptr [esp + 0x60], ebx
            //   e8????????           |                     
            //   8bd8                 | dec                 eax
            //   33ff                 | mov                 dword ptr [esp + 0x28], esi
            //   85db                 | dec                 eax
            //   740f                 | mov                 edi, dword ptr [ebp + 0x1a8]

        $sequence_1 = { eb05 4c8b7c2430 4585e4 752a 410fbae508 7323 85db }
            // n = 7, score = 200
            //   eb05                 | mov                 ebp, ebx
            //   4c8b7c2430           | dec                 eax
            //   4585e4               | lea                 ebp, [0x5fb33]
            //   752a                 | dec                 eax
            //   410fbae508           | mov                 esi, edi
            //   7323                 | and                 edi, 0x1f
            //   85db                 | dec                 eax

        $sequence_2 = { 66443b7706 7338 488d5c3b2c 0f1f00 8b573c 8b4bfc e8???????? }
            // n = 7, score = 200
            //   66443b7706           | dec                 eax
            //   7338                 | mov                 edx, dword ptr [ebx + 0x630]
            //   488d5c3b2c           | dec                 eax
            //   0f1f00               | lea                 ecx, [0x30a6e]
            //   8b573c               | dec                 eax
            //   8b4bfc               | cmp                 dword ptr [ebx + 0x540], ebp
            //   e8????????           |                     

        $sequence_3 = { e8???????? 468d1c2b 488d8e64030000 4963d3 448bc3 4803d5 e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   468d1c2b             | mov                 eax, edx
            //   488d8e64030000       | dec                 eax
            //   4963d3               | mov                 eax, dword ptr [ecx + 0x1a8]
            //   448bc3               | cmp                 edx, 0x14b
            //   4803d5               | jne                 0x584
            //   e8????????           |                     

        $sequence_4 = { e8???????? 488d15a2700300 488bcb 448bc0 e8???????? eb7d 83f804 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   488d15a2700300       | mov                 edi, edx
            //   488bcb               | inc                 esp
            //   448bc0               | mov                 dword ptr [esp + 0x50], esp
            //   e8????????           |                     
            //   eb7d                 | dec                 eax
            //   83f804               | mov                 esi, ecx

        $sequence_5 = { 488b05???????? 4833c4 4889842490000000 448bc1 488d4c2420 488bfa e8???????? }
            // n = 7, score = 200
            //   488b05????????       |                     
            //   4833c4               | dec                 eax
            //   4889842490000000     | lea                 ebx, [esp + 0x30]
            //   448bc1               | nop                 dword ptr [eax + eax]
            //   488d4c2420           | inc                 esp
            //   488bfa               | movzx               ecx, byte ptr [esp + edi + 0x20]
            //   e8????????           |                     

        $sequence_6 = { e8???????? 85c0 744a 488bf3 488d8da8050000 498bd4 492bf4 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   85c0                 | dec                 eax
            //   744a                 | lea                 eax, [0x22ba3]
            //   488bf3               | dec                 eax
            //   488d8da8050000       | lea                 edx, [0x26553]
            //   498bd4               | inc                 ebp
            //   492bf4               | test                esp, esp

        $sequence_7 = { eb0b 80f902 7506 888b7f020000 440fb78396030000 0fb78b94030000 0fb7937e020000 }
            // n = 7, score = 200
            //   eb0b                 | inc                 ebp
            //   80f902               | xor                 esp, esp
            //   7506                 | dec                 ebp
            //   888b7f020000         | sub                 eax, edx
            //   440fb78396030000     | dec                 ecx
            //   0fb78b94030000       | mov                 edx, edx
            //   0fb7937e020000       | dec                 ecx

        $sequence_8 = { 0f850b030000 bd05000000 33f6 448bed 66859794030000 753e 39b770020000 }
            // n = 7, score = 200
            //   0f850b030000         | mov                 ecx, dword ptr [edi]
            //   bd05000000           | dec                 esp
            //   33f6                 | mov                 eax, dword ptr [ecx + 0x378]
            //   448bed               | dec                 ecx
            //   66859794030000       | cmp                 dword ptr [eax + 0x18], 0
            //   753e                 | mov                 ebx, eax
            //   39b770020000         | test                eax, eax

        $sequence_9 = { c1c00a 448bc2 4433c0 4433c1 45034630 4503c1 448bca }
            // n = 7, score = 200
            //   c1c00a               | inc                 esp
            //   448bc2               | mov                 dword ptr [ebx + 0x16c], esp
            //   4433c0               | inc                 esp
            //   4433c1               | mov                 dword ptr [ebx + 0x134], edi
            //   45034630             | mov                 eax, edi
            //   4503c1               | dec                 eax
            //   448bca               | mov                 edi, dword ptr [esp + 0x150]

    condition:
        7 of them and filesize < 1400832
}
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