Analysis

  • max time kernel
    122s
  • max time network
    127s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09-06-2024 02:03

General

  • Target

    e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe

  • Size

    4.7MB

  • MD5

    d2f16131d658784ee0234daef80a4893

  • SHA1

    61aef10c8d42c677a2ec8e93ac3326ef3891bb0d

  • SHA256

    e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b

  • SHA512

    ad79f1d21040b4e03044e7374662cefdb4bebc15df3a3a9544ac06eab20b25fbb659993b5a8225d63eae50819ab22eec88ff70edba9533f8bd11ad55fee42bce

  • SSDEEP

    98304:mLdFZY+c+ESBPrIZIluqbcl94xpFi22z+W8D6G6jgslLZH1j6:SFBEeUSluqbclSs2U7Uuj3FZ0

Malware Config

Extracted

Family

socks5systemz

C2

bbwbokn.com

http://bbwbokn.com/search/?q=67e28dd83d5fa77a480faf1e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f171ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c9e793923e

http://bbwbokn.com/search/?q=67e28dd83d5fa77a480faf1e7c27d78406abdd88be4b12eab517aa5c96bd86e4928e4a96148ab2865b77f80ebad9c50f7cb63037ed2ab423a4344383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e89d9333cb6793

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe
    "C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2948
    • C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp" /SL5="$4023C,4666921,54272,C:\Users\Admin\AppData\Local\Temp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3364
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2004
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:3900

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
    Filesize

    2.8MB

    MD5

    eb006d9f9056a10d7041b60c92d5748d

    SHA1

    fb3d1c69f0ab0e80a6b1453e3b959ed6a93eab07

    SHA256

    70714c41c7687e2e864ef98dc47829bbb765a370ce07c4ef45ef7032c6ed241a

    SHA512

    26194cca01da8b17ae81996d84b572d602ba64d4de8225c47be5cc9795c4f43b73d04ee5aa6ff2233a4c9d9e21c2930e97633a67a622a9ad9d03f9bfd87f5d8f

  • C:\Users\Admin\AppData\Local\Temp\is-EVC4V.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-GIRTC.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
    Filesize

    680KB

    MD5

    dff4f58a01a8e88e4a2f821ca761d901

    SHA1

    e67e24669220213f895b68c0d662b02b03469b4a

    SHA256

    91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76

    SHA512

    049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

  • memory/2004-59-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/2004-60-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/2004-65-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/2004-64-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/2948-70-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/2948-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/2948-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/3364-10-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3364-71-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3900-76-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-87-0x0000000002800000-0x00000000028A2000-memory.dmp
    Filesize

    648KB

  • memory/3900-72-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-75-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-68-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-79-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-82-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-85-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-91-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-69-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-96-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-99-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-102-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-105-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-108-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-111-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-113-0x0000000002800000-0x00000000028A2000-memory.dmp
    Filesize

    648KB

  • memory/3900-112-0x0000000002800000-0x00000000028A2000-memory.dmp
    Filesize

    648KB

  • memory/3900-117-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/3900-120-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB