SYMBOLCOMMON_NAMEaka. SYNONYMS
win.pslogger (Back to overview)

PSLogger

aka: ECCENTRICBANDWAGON

Actor(s): Lazarus Group


There is no description at this point.

References
2020-08-26CISACISA
@online{cisa:20200826:mar103017061v1:735a8fc, author = {CISA}, title = {{MAR-10301706-1.v1 - North Korean Remote Access Tool: ECCENTRICBANDWAGON}}, date = {2020-08-26}, organization = {CISA}, url = {https://us-cert.cisa.gov/ncas/analysis-reports/ar20-239a}, language = {English}, urldate = {2020-09-01} } MAR-10301706-1.v1 - North Korean Remote Access Tool: ECCENTRICBANDWAGON
PSLogger
2019-01-22One Night in NorfolkNorfolk
@online{norfolk:20190122:lazarus:74b5983, author = {Norfolk}, title = {{A Lazarus Keylogger- PSLogger}}, date = {2019-01-22}, organization = {One Night in Norfolk}, url = {https://norfolkinfosec.com/a-lazarus-keylogger-pslogger/}, language = {English}, urldate = {2020-01-10} } A Lazarus Keylogger- PSLogger
PSLogger
Yara Rules
[TLP:WHITE] win_pslogger_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_pslogger_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.pslogger"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 488b55e0 483bda 741f 488b0b 4885c9 740a }
            // n = 6, score = 200
            //   488b55e0             | dec                 eax
            //   483bda               | mov                 edx, dword ptr [ebp - 0x20]
            //   741f                 | dec                 eax
            //   488b0b               | cmp                 ebx, edx
            //   4885c9               | je                  0x21
            //   740a                 | dec                 eax

        $sequence_1 = { 33c9 488d159f510100 48891401 4883c230 }
            // n = 4, score = 200
            //   33c9                 | mov                 edi, edx
            //   488d159f510100       | dec                 eax
            //   48891401             | mov                 ebx, ecx
            //   4883c230             | dec                 eax

        $sequence_2 = { 4885c9 740c e8???????? 4c8935???????? 488d0dfb3b0100 }
            // n = 5, score = 200
            //   4885c9               | dec                 eax
            //   740c                 | lea                 esi, [0x15406]
            //   e8????????           |                     
            //   4c8935????????       |                     
            //   488d0dfb3b0100       | dec                 eax

        $sequence_3 = { c74424405b445d00 e9???????? c74424405b425d00 e9???????? }
            // n = 4, score = 200
            //   c74424405b445d00     | mov                 ecx, dword ptr [ebx]
            //   e9????????           |                     
            //   c74424405b425d00     | dec                 eax
            //   e9????????           |                     

        $sequence_4 = { 488bcf e8???????? 488bcf 488d3506540100 }
            // n = 4, score = 200
            //   488bcf               | test                ecx, ecx
            //   e8????????           |                     
            //   488bcf               | je                  0xc
            //   488d3506540100       | mov                 dword ptr [esp + 0x40], 0x5d445b

        $sequence_5 = { 85c0 7408 8bcb ff15???????? e8???????? 488d154acc0000 488d0d23cc0000 }
            // n = 7, score = 200
            //   85c0                 | lea                 ecx, [ebp - 0x40]
            //   7408                 | dec                 eax
            //   8bcb                 | lea                 edx, [0x9925]
            //   ff15????????         |                     
            //   e8????????           |                     
            //   488d154acc0000       | inc                 ecx
            //   488d0d23cc0000       | mov                 eax, 0x40

        $sequence_6 = { 488bfa 488bd9 488d4dc0 488d1525990000 41b840000000 }
            // n = 5, score = 200
            //   488bfa               | mov                 dword ptr [esp + 0x40], 0x5d425b
            //   488bd9               | dec                 eax
            //   488d4dc0             | mov                 ecx, edi
            //   488d1525990000       | dec                 eax
            //   41b840000000         | mov                 ecx, edi

        $sequence_7 = { 488bc1 48c1f805 488d1518040100 83e11f 486bc958 488b04c2 80640808fe }
            // n = 7, score = 200
            //   488bc1               | dec                 eax
            //   48c1f805             | test                ecx, ecx
            //   488d1518040100       | je                  0x11
            //   83e11f               | dec                 eax
            //   486bc958             | lea                 ecx, [0x13bfb]
            //   488b04c2             | xor                 ecx, ecx
            //   80640808fe           | dec                 eax

        $sequence_8 = { 56 33f6 8b8688b14200 85c0 740e 50 }
            // n = 6, score = 100
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   8b8688b14200         | mov                 eax, dword ptr [esi + 0x42b188]
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   50                   | push                eax

        $sequence_9 = { ff15???????? e8???????? 68???????? ff15???????? 8b4dfc 33c0 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   e8????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33c0                 | xor                 eax, eax

        $sequence_10 = { e8???????? 83c408 c745d8a8024200 8d45d8 68???????? 50 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   c745d8a8024200       | mov                 dword ptr [ebp - 0x28], 0x4202a8
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_11 = { 83c408 85db 750f c705????????00000100 }
            // n = 4, score = 100
            //   83c408               | add                 esp, 8
            //   85db                 | test                ebx, ebx
            //   750f                 | jne                 0x11
            //   c705????????00000100     |     

        $sequence_12 = { 59 0304bd88b14200 5f eb05 b8???????? 8a4028 }
            // n = 6, score = 100
            //   59                   | pop                 ecx
            //   0304bd88b14200       | add                 eax, dword ptr [edi*4 + 0x42b188]
            //   5f                   | pop                 edi
            //   eb05                 | jmp                 7
            //   b8????????           |                     
            //   8a4028               | mov                 al, byte ptr [eax + 0x28]

        $sequence_13 = { 6804010000 8d84245c020000 6a00 50 e8???????? 83c40c }
            // n = 6, score = 100
            //   6804010000           | push                0x104
            //   8d84245c020000       | lea                 eax, [esp + 0x25c]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_14 = { 898598fbffff 8b4318 034310 89859cfbffff 8d45e8 }
            // n = 5, score = 100
            //   898598fbffff         | mov                 dword ptr [ebp - 0x468], eax
            //   8b4318               | mov                 eax, dword ptr [ebx + 0x18]
            //   034310               | add                 eax, dword ptr [ebx + 0x10]
            //   89859cfbffff         | mov                 dword ptr [ebp - 0x464], eax
            //   8d45e8               | lea                 eax, [ebp - 0x18]

        $sequence_15 = { 66c745e8f879 c645ea00 e8???????? 8d95c4feffff }
            // n = 4, score = 100
            //   66c745e8f879         | mov                 word ptr [ebp - 0x18], 0x79f8
            //   c645ea00             | mov                 byte ptr [ebp - 0x16], 0
            //   e8????????           |                     
            //   8d95c4feffff         | lea                 edx, [ebp - 0x13c]

    condition:
        7 of them and filesize < 434176
}
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