Analysis

  • max time kernel
    122s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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

bfdmlcb.com

http://bfdmlcb.com/search/?q=67e28dd86c5cf27a4508ad177c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f771ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff819c9e793923f

http://bfdmlcb.com/search/?q=67e28dd86c5cf27a4508ad177c27d78406abdd88be4b12eab517aa5c96bd86ef918e4d805a8bbc896c58e713bc90c91836b5281fc235a925ed3e54d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee929232c5699e12

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:4676
    • C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp" /SL5="$401CE,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:1628
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:1020
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4492

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-4UR29.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-OC6V4.tmp\e250e4bfdd5a58be90228eb5b2b4fb0f4686a36b433b130cbe50a4008a874c8b.tmp
    Filesize

    680KB

    MD5

    dff4f58a01a8e88e4a2f821ca761d901

    SHA1

    e67e24669220213f895b68c0d662b02b03469b4a

    SHA256

    91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76

    SHA512

    049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

  • memory/1020-59-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/1020-60-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/1020-65-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/1020-64-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/1628-71-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/1628-10-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/4492-76-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-87-0x0000000000A20000-0x0000000000AC2000-memory.dmp
    Filesize

    648KB

  • memory/4492-69-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-120-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-117-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-72-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-73-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-112-0x0000000000A20000-0x0000000000AC2000-memory.dmp
    Filesize

    648KB

  • memory/4492-79-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-82-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-85-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-68-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-90-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-96-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-99-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-102-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-105-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-108-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-111-0x0000000000400000-0x00000000006C4000-memory.dmp
    Filesize

    2.8MB

  • memory/4492-113-0x0000000000A20000-0x0000000000AC2000-memory.dmp
    Filesize

    648KB

  • memory/4676-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/4676-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/4676-70-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB