General

  • Target

    .

  • Size

    11KB

  • Sample

    240504-wezlmadc2t

  • MD5

    771dfeb6648da2f3cae036e72cd5c159

  • SHA1

    ee5a158cfdb8be10efac714fd6895097eb37bf7d

  • SHA256

    184cfda9476c09798764f78744ace801737869dd30da8a81480b471a10f37c22

  • SHA512

    12da87cb9f8ecc579c1085c3a76d13aac4a05d2c6c1d1d187b69df9ea78713941af16b91ff8434d3d1851012e6db2025193ceca5f4bee1fbdea07c341da3f1c4

  • SSDEEP

    192:8aGC919XNWBr8kG3WHeY9QVzP5j8oU0AuW9PMnytNkcV8K3x8UV6+hHrXAk:T9199WFzOWHevVzPJ88zxnyteA8yxPVN

Malware Config

Targets

    • Target

      .

    • Size

      11KB

    • MD5

      771dfeb6648da2f3cae036e72cd5c159

    • SHA1

      ee5a158cfdb8be10efac714fd6895097eb37bf7d

    • SHA256

      184cfda9476c09798764f78744ace801737869dd30da8a81480b471a10f37c22

    • SHA512

      12da87cb9f8ecc579c1085c3a76d13aac4a05d2c6c1d1d187b69df9ea78713941af16b91ff8434d3d1851012e6db2025193ceca5f4bee1fbdea07c341da3f1c4

    • SSDEEP

      192:8aGC919XNWBr8kG3WHeY9QVzP5j8oU0AuW9PMnytNkcV8K3x8UV6+hHrXAk:T9199WFzOWHevVzPJ88zxnyteA8yxPVN

    • CrimsonRAT main payload

    • CrimsonRat

      Crimson RAT is a malware linked to a Pakistani-linked threat actor.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • RevengeRAT

      Remote-access trojan with a wide range of capabilities.

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • RevengeRat Executable

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Modifies RDP port number used by Windows

    • Modifies Windows Firewall

    • Sets file execution options in registry

    • Sets file to hidden

      Modifies file attributes to stop it showing in Explorer etc.

    • Sets service image path in registry

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Registers COM server for autorun

    • Unexpected DNS network traffic destination

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

    • Uses the VBS compiler for execution

    • Windows security modification

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Checks system information in the registry

      System information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks