SYMBOLCOMMON_NAMEaka. SYNONYMS
win.lock_pos (Back to overview)

LockPOS


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References
2018-01-16CylanceCylance Threat Research Team
@online{team:20180116:threat:9f912f5, author = {Cylance Threat Research Team}, title = {{Threat Spotlight: LockPOS Point of Sale Malware}}, date = {2018-01-16}, organization = {Cylance}, url = {https://www.cylance.com/en_us/blog/threat-spotlight-lockpos-point-of-sale-malware.html}, language = {English}, urldate = {2019-11-25} } Threat Spotlight: LockPOS Point of Sale Malware
LockPOS
2018-01-03CyberbitHod Gavriel
@online{gavriel:20180103:new:34da39b, author = {Hod Gavriel}, title = {{New LockPoS Malware Injection Technique}}, date = {2018-01-03}, organization = {Cyberbit}, url = {https://www.cyberbit.com/new-lockpos-malware-injection-technique/}, language = {English}, urldate = {2019-11-28} } New LockPoS Malware Injection Technique
LockPOS
2017-07-12NetScoutDennis Schwarz
@online{schwarz:20170712:lockpos:c5394b5, author = {Dennis Schwarz}, title = {{LockPoS Joins the Flock}}, date = {2017-07-12}, organization = {NetScout}, url = {https://www.arbornetworks.com/blog/asert/lockpos-joins-flock/}, language = {English}, urldate = {2020-01-06} } LockPoS Joins the Flock
LockPOS
Yara Rules
[TLP:WHITE] win_lock_pos_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_lock_pos_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.lock_pos"
        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 = { 8bec 837d0800 7704 33c0 }
            // n = 4, score = 400
            //   8bec                 | mov                 ebp, esp
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   7704                 | ja                  6
            //   33c0                 | xor                 eax, eax

        $sequence_1 = { 8bec 8b4508 8b0d???????? 8b0481 }
            // n = 4, score = 400
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b0d????????         |                     
            //   8b0481               | mov                 eax, dword ptr [ecx + eax*4]

        $sequence_2 = { 8d85f8fdffff 50 6a00 6a00 6a23 }
            // n = 5, score = 300
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a23                 | push                0x23

        $sequence_3 = { 55 8bec 81eca4040000 56 }
            // n = 4, score = 300
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81eca4040000         | sub                 esp, 0x4a4
            //   56                   | push                esi

        $sequence_4 = { 6a00 6a23 6a00 ff15???????? 8d8df8fdffff }
            // n = 5, score = 300
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8d8df8fdffff         | lea                 ecx, [ebp - 0x208]

        $sequence_5 = { 8955f8 837df840 721f 817df800040000 7316 8b45f8 }
            // n = 6, score = 200
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   837df840             | cmp                 dword ptr [ebp - 8], 0x40
            //   721f                 | jb                  0x21
            //   817df800040000       | cmp                 dword ptr [ebp - 8], 0x400
            //   7316                 | jae                 0x18
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]

        $sequence_6 = { 8945f8 8b4df8 81c100020000 894df8 }
            // n = 4, score = 200
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   81c100020000         | add                 ecx, 0x200
            //   894df8               | mov                 dword ptr [ebp - 8], ecx

        $sequence_7 = { 3c34 740c 3c35 7408 3c36 0f85ab010000 8d45fc }
            // n = 7, score = 200
            //   3c34                 | cmp                 al, 0x34
            //   740c                 | je                  0xe
            //   3c35                 | cmp                 al, 0x35
            //   7408                 | je                  0xa
            //   3c36                 | cmp                 al, 0x36
            //   0f85ab010000         | jne                 0x1b1
            //   8d45fc               | lea                 eax, [ebp - 4]

        $sequence_8 = { 83c408 c785c8fdffff2c020000 8d8dc8fdffff 51 8b55fc }
            // n = 5, score = 200
            //   83c408               | add                 esp, 8
            //   c785c8fdffff2c020000     | mov    dword ptr [ebp - 0x238], 0x22c
            //   8d8dc8fdffff         | lea                 ecx, [ebp - 0x238]
            //   51                   | push                ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]

        $sequence_9 = { 8901 fec3 8ac3 5f 5e 5b }
            // n = 6, score = 200
            //   8901                 | mov                 dword ptr [ecx], eax
            //   fec3                 | inc                 bl
            //   8ac3                 | mov                 al, bl
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_10 = { 59 8945fc 897df8 3bc7 0f8445010000 ff15???????? 8945e4 }
            // n = 7, score = 200
            //   59                   | pop                 ecx
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   897df8               | mov                 dword ptr [ebp - 8], edi
            //   3bc7                 | cmp                 eax, edi
            //   0f8445010000         | je                  0x14b
            //   ff15????????         |                     
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax

        $sequence_11 = { 03483c 894df8 8b55f8 83c278 8955f4 8b45f4 8b4d08 }
            // n = 7, score = 200
            //   03483c               | add                 ecx, dword ptr [eax + 0x3c]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   83c278               | add                 edx, 0x78
            //   8955f4               | mov                 dword ptr [ebp - 0xc], edx
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_12 = { 8b4df8 83c101 894df8 8b55f8 3b550c 730b 8b45fc }
            // n = 7, score = 200
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   83c101               | add                 ecx, 1
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   3b550c               | cmp                 edx, dword ptr [ebp + 0xc]
            //   730b                 | jae                 0xd
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

    condition:
        7 of them and filesize < 319488
}
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