General

  • Target

    021b950ab2b242bfca221fc9afd905857ed131664515c1f01646eaa5aa86fb30

  • Size

    789KB

  • Sample

    220523-txmzfahhfp

  • MD5

    4fdba0048b9bc513b1034ac90cd6278c

  • SHA1

    4cdda2229e092a769b1436ab4c8ad298b928000c

  • SHA256

    021b950ab2b242bfca221fc9afd905857ed131664515c1f01646eaa5aa86fb30

  • SHA512

    cd69d33b4cd1347c89ef66fffb9dd823e3ee17336e5c527b44042bf710a29ea853dacafec1a133cf50d5a4314b0deb3717461076af705e9098af192c177f0952

Malware Config

Targets

    • Target

      021b950ab2b242bfca221fc9afd905857ed131664515c1f01646eaa5aa86fb30

    • Size

      789KB

    • MD5

      4fdba0048b9bc513b1034ac90cd6278c

    • SHA1

      4cdda2229e092a769b1436ab4c8ad298b928000c

    • SHA256

      021b950ab2b242bfca221fc9afd905857ed131664515c1f01646eaa5aa86fb30

    • SHA512

      cd69d33b4cd1347c89ef66fffb9dd823e3ee17336e5c527b44042bf710a29ea853dacafec1a133cf50d5a4314b0deb3717461076af705e9098af192c177f0952

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Adds Run key to start application

    • 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)

    • Writes to the Master Boot Record (MBR)

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

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Hidden Files and Directories

1
T1158

Defense Evasion

Modify Registry

2
T1112

Hidden Files and Directories

1
T1158

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Tasks