SYMBOLCOMMON_NAMEaka. SYNONYMS
win.vsingle (Back to overview)

VSingle

Actor(s): Lazarus Group


There is no description at this point.

References
2022-09-08Cisco TalosJung soo An, Asheer Malhotra, Vitor Ventura
@online{an:20220908:lazarus:236b4b4, author = {Jung soo An and Asheer Malhotra and Vitor Ventura}, title = {{Lazarus and the tale of three RATs}}, date = {2022-09-08}, organization = {Cisco Talos}, url = {https://blog.talosintelligence.com/2022/09/lazarus-three-rats.html}, language = {English}, urldate = {2023-01-19} } Lazarus and the tale of three RATs
MagicRAT MimiKatz VSingle YamaBot
2022-07-05JPCERT/CCShusei Tomonaga
@online{tomonaga:20220705:vsingle:85138e2, author = {Shusei Tomonaga}, title = {{VSingle malware that obtains C2 server information from GitHub}}, date = {2022-07-05}, organization = {JPCERT/CC}, url = {https://blogs.jpcert.or.jp/en/2022/07/vsingle.html}, language = {English}, urldate = {2022-07-05} } VSingle malware that obtains C2 server information from GitHub
VSingle
2021-03-22JPCERT/CCShusei Tomonaga
@online{tomonaga:20210322:lazarus:0adc271, author = {Shusei Tomonaga}, title = {{Lazarus Attack Activities Targeting Japan (VSingle/ValeforBeta)}}, date = {2021-03-22}, organization = {JPCERT/CC}, url = {https://blogs.jpcert.or.jp/en/2021/03/Lazarus_malware3.html}, language = {English}, urldate = {2021-03-25} } Lazarus Attack Activities Targeting Japan (VSingle/ValeforBeta)
VSingle
Yara Rules
[TLP:WHITE] win_vsingle_auto (20230125 | Detects win.vsingle.)
rule win_vsingle_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.vsingle."
        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.vsingle"
        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 = { 81f9ff000000 750f 8b5508 0355e8 c682b000000000 ebcd 8b4508 }
            // n = 7, score = 200
            //   81f9ff000000         | cmp                 ecx, 0xff
            //   750f                 | jne                 0x11
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   0355e8               | add                 edx, dword ptr [ebp - 0x18]
            //   c682b000000000       | mov                 byte ptr [edx + 0xb0], 0
            //   ebcd                 | jmp                 0xffffffcf
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_1 = { 8b4db4 83c101 894db4 eba9 8b55b4 8955a4 }
            // n = 6, score = 200
            //   8b4db4               | mov                 ecx, dword ptr [ebp - 0x4c]
            //   83c101               | add                 ecx, 1
            //   894db4               | mov                 dword ptr [ebp - 0x4c], ecx
            //   eba9                 | jmp                 0xffffffab
            //   8b55b4               | mov                 edx, dword ptr [ebp - 0x4c]
            //   8955a4               | mov                 dword ptr [ebp - 0x5c], edx

        $sequence_2 = { 8945f8 8b45f8 8b4dfc 33cd e8???????? 8be5 }
            // n = 6, score = 200
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp

        $sequence_3 = { c68415acf7ffff00 8b8588f7ffff 038590f7ffff 898588f7ffff c78590f7ffff00000000 8d8dacf7ffff }
            // n = 6, score = 200
            //   c68415acf7ffff00     | mov                 byte ptr [ebp + edx - 0x854], 0
            //   8b8588f7ffff         | mov                 eax, dword ptr [ebp - 0x878]
            //   038590f7ffff         | add                 eax, dword ptr [ebp - 0x870]
            //   898588f7ffff         | mov                 dword ptr [ebp - 0x878], eax
            //   c78590f7ffff00000000     | mov    dword ptr [ebp - 0x870], 0
            //   8d8dacf7ffff         | lea                 ecx, [ebp - 0x854]

        $sequence_4 = { e8???????? 0330 56 8b4d08 }
            // n = 4, score = 200
            //   e8????????           |                     
            //   0330                 | add                 esi, dword ptr [eax]
            //   56                   | push                esi
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_5 = { 33d0 8855fe 0fb64dfe 51 e8???????? 83c404 8845fe }
            // n = 7, score = 200
            //   33d0                 | xor                 edx, eax
            //   8855fe               | mov                 byte ptr [ebp - 2], dl
            //   0fb64dfe             | movzx               ecx, byte ptr [ebp - 2]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8845fe               | mov                 byte ptr [ebp - 2], al

        $sequence_6 = { 6a00 8d85fdfbffff 50 e8???????? 83c40c 8b4d08 83c104 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   8d85fdfbffff         | lea                 eax, [ebp - 0x403]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   83c104               | add                 ecx, 4

        $sequence_7 = { 8d440a18 8945b4 b908000000 6bd100 }
            // n = 4, score = 200
            //   8d440a18             | lea                 eax, [edx + ecx + 0x18]
            //   8945b4               | mov                 dword ptr [ebp - 0x4c], eax
            //   b908000000           | mov                 ecx, 8
            //   6bd100               | imul                edx, ecx, 0

        $sequence_8 = { 51 8b5510 039588f7ffff 52 6800080000 8d85acf7ffff }
            // n = 6, score = 200
            //   51                   | push                ecx
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   039588f7ffff         | add                 edx, dword ptr [ebp - 0x878]
            //   52                   | push                edx
            //   6800080000           | push                0x800
            //   8d85acf7ffff         | lea                 eax, [ebp - 0x854]

        $sequence_9 = { 81bdecfeffff00a00f00 7318 8b95f0feffff 52 8d85f8feffff 50 e8???????? }
            // n = 7, score = 200
            //   81bdecfeffff00a00f00     | cmp    dword ptr [ebp - 0x114], 0xfa000
            //   7318                 | jae                 0x1a
            //   8b95f0feffff         | mov                 edx, dword ptr [ebp - 0x110]
            //   52                   | push                edx
            //   8d85f8feffff         | lea                 eax, [ebp - 0x108]
            //   50                   | push                eax
            //   e8????????           |                     

    condition:
        7 of them and filesize < 940032
}
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