Analysis

  • max time kernel
    149s
  • max time network
    152s
  • 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 01:40

General

  • Target

    99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.exe

  • Size

    4.7MB

  • MD5

    9b1176e24facc6e241ad25eaa864e746

  • SHA1

    12746866303969d21b32ea5950ef7f429dc61513

  • SHA256

    99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b

  • SHA512

    df6b0ed0e7883bfbe531ec8dcf6baa8e9b1b85c30ceaa400286ffafa0076c6f3353830a13a94410c9d4b050f2efe1973d1600cade419a06d359a3dae36eb5aef

  • SSDEEP

    98304:mTChVFZg8XPK2LrLUMdmqIQ107Tz9zNVaJcoqaeQ8+An6:eCLFSOPtLnI17VNMeoqnnG

Malware Config

Extracted

Family

socks5systemz

C2

bpqufyo.com

http://bpqufyo.com/search/?q=67e28dd86b5cf27c420ff9177c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a371ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff819c9e8969b3f

http://bpqufyo.com/search/?q=67e28dd86b5cf27c420ff9177c27d78406abdd88be4b12eab517aa5c96bd86e9958249825a8bbc896c58e713bc90c91936b5281fc235a925ed3e00d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee929232ca6c9712

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Detects executables packed with VMProtect. 18 IoCs
  • 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\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.exe
    "C:\Users\Admin\AppData\Local\Temp\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4928
    • C:\Users\Admin\AppData\Local\Temp\is-V29OJ.tmp\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-V29OJ.tmp\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.tmp" /SL5="$800E0,4667057,54272,C:\Users\Admin\AppData\Local\Temp\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1336
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:1892
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4700

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

    2a761f4fbde370399cfb8a3df34306dd

    SHA1

    e2fa78cb38aa55ca48f337d22afc862016772bcf

    SHA256

    09137001d363739719cd2fcb03f496861e4cf95fce651db08ebc2f153c36060c

    SHA512

    3564aa2c9c7864e9dca0e9c0c57485028714c8824bd5234395cfac0b17f6e88979417d5ddf0e491857c02bfab4d247ae915b0b70c6f0e7bdae655b05fa45d8d6

  • C:\Users\Admin\AppData\Local\Temp\is-CL240.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-V29OJ.tmp\99d02207061f8cd1bb41dfc5ce4891f5913bdf35498e043c7d8c2b9ceee2c00b.tmp
    Filesize

    680KB

    MD5

    dff4f58a01a8e88e4a2f821ca761d901

    SHA1

    e67e24669220213f895b68c0d662b02b03469b4a

    SHA256

    91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76

    SHA512

    049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

  • memory/1336-69-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/1336-10-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/1892-64-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/1892-59-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/1892-60-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/1892-63-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-73-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-92-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-116-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-113-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-70-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-109-0x0000000002880000-0x0000000002922000-memory.dmp
    Filesize

    648KB

  • memory/4700-76-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-79-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-82-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-87-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-85-0x0000000002880000-0x0000000002922000-memory.dmp
    Filesize

    648KB

  • memory/4700-67-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-95-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-98-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-101-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-104-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-107-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/4700-108-0x0000000002880000-0x0000000002922000-memory.dmp
    Filesize

    648KB

  • memory/4928-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/4928-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/4928-68-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB