General

  • Target

    Mnemonicator v1.0.3 (infected).7z

  • Size

    37.5MB

  • Sample

    250102-f1fsmsxqbl

  • MD5

    e18d698e01dbf05dc08822d787e825e5

  • SHA1

    1ea9a22d179d21a280a5de8b5ead6f3bae52c8d2

  • SHA256

    32cf3a092e09e4609675078976e052066c3fe7b42128a89b87b2473a2f51e42f

  • SHA512

    654212ffa8bc6e46b3f8db23a0bfd5574193f18807c63f29f15c0bbfd86714c064fff6f9ca8a2d88c547d48c33f73825d9f95ca2ac2707c8f9278968877106f2

  • SSDEEP

    786432:f68J6Hf9bldLadW0mnN1b2lUJVZh+evb6qylASOL:yddLadgrZQ46qylASg

Malware Config

Extracted

Family

xworm

C2

SLL.casacam.net:4444

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    systempu.exe

Extracted

Family

xred

C2

xred.mooo.com

Attributes
  • email

    [email protected]

  • payload_url

    http://freedns.afraid.org/api/?action=getdyndns&sha=a30fa98efc092684e8d1c5cff797bcc613562978

    https://docs.google.com/uc?id=0BxsMXGfPIZfSVlVsOGlEVGxuZVk&export=download

    https://www.dropbox.com/s/n1w4p8gc6jzo0sg/SUpdate.ini?dl=1

    http://xred.site50.net/syn/SUpdate.ini

    https://docs.google.com/uc?id=0BxsMXGfPIZfSVzUyaHFYVkQxeFk&export=download

    https://www.dropbox.com/s/zhp1b06imehwylq/Synaptics.rar?dl=1

    http://xred.site50.net/syn/Synaptics.rar

    https://docs.google.com/uc?id=0BxsMXGfPIZfSTmlVYkxhSDg5TzQ&export=download

    https://www.dropbox.com/s/fzj752whr3ontsm/SSLLibrary.dll?dl=1

    http://xred.site50.net/syn/SSLLibrary.dll

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://github.com/NGROKC/CTC/raw/main/CTC64.dll

Targets

    • Target

      Mnemonicator v1.0.3 (infected).7z

    • Size

      37.5MB

    • MD5

      e18d698e01dbf05dc08822d787e825e5

    • SHA1

      1ea9a22d179d21a280a5de8b5ead6f3bae52c8d2

    • SHA256

      32cf3a092e09e4609675078976e052066c3fe7b42128a89b87b2473a2f51e42f

    • SHA512

      654212ffa8bc6e46b3f8db23a0bfd5574193f18807c63f29f15c0bbfd86714c064fff6f9ca8a2d88c547d48c33f73825d9f95ca2ac2707c8f9278968877106f2

    • SSDEEP

      786432:f68J6Hf9bldLadW0mnN1b2lUJVZh+evb6qylASOL:yddLadgrZQ46qylASg

    • Detect Xworm Payload

    • R77 family

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • r77

      r77 is an open-source, userland rootkit.

    • r77 rootkit payload

      Detects the payload of the r77 rootkit.

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Event Triggered Execution: AppInit DLLs

      Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks