General

  • Target

    RNSM00443.7z

  • Size

    98.7MB

  • Sample

    241024-xbl2ss1ajk

  • MD5

    ffd83cd295f7cbc6d53e04355002f1f7

  • SHA1

    10537b6b3ab6ea409ce1b4051e947f3b78d33f68

  • SHA256

    720447db58834d8082eefc2f5b97e7567a6c6c6337c2e40300894fe8a467b671

  • SHA512

    be26c60d2ce2cf987ff33d1645a82220903edc986e9acef4add8d676d39e4083f2e6e7af0797639e2a4910dd43313b987beb15b8cc9c9cbd5f49cc2696f1d614

  • SSDEEP

    1572864:BLWlEuS5AE1Iq4FF3FJzDHuIHOp0+jMPEVDlxbQsApL/PtqclAT93WV5ajmYMHcj:BSqfAnq4FrBRH+jZVf05/lqGeQimPcj3

Malware Config

Extracted

Family

crimsonrat

C2

167.160.166.80

Targets

    • Target

      RNSM00443.7z

    • Size

      98.7MB

    • MD5

      ffd83cd295f7cbc6d53e04355002f1f7

    • SHA1

      10537b6b3ab6ea409ce1b4051e947f3b78d33f68

    • SHA256

      720447db58834d8082eefc2f5b97e7567a6c6c6337c2e40300894fe8a467b671

    • SHA512

      be26c60d2ce2cf987ff33d1645a82220903edc986e9acef4add8d676d39e4083f2e6e7af0797639e2a4910dd43313b987beb15b8cc9c9cbd5f49cc2696f1d614

    • SSDEEP

      1572864:BLWlEuS5AE1Iq4FF3FJzDHuIHOp0+jMPEVDlxbQsApL/PtqclAT93WV5ajmYMHcj:BSqfAnq4FrBRH+jZVf05/lqGeQimPcj3

    • CrimsonRat

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

    • Detect MafiaWare666 ransomware

    • MafiaWare666 Ransomware

      MafiaWare666 is ransomware written in C# with multiple variants.

    • Modifies WinLogon for persistence

    • VanillaRat

      VanillaRat is an advanced remote administration tool coded in C#.

    • Renames multiple (85) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Vanilla Rat payload

    • Disables Task Manager via registry modification

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Sets desktop wallpaper using registry

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks