General

  • Target

    4a44d19c6dd86e7051df6055508ad99b.exe

  • Size

    828KB

  • Sample

    210506-wlfbc9xsa6

  • MD5

    4a44d19c6dd86e7051df6055508ad99b

  • SHA1

    44d1fda30e250570c5a6141b1791b48febd5615b

  • SHA256

    869bd0ca39150a6e0f87609ca7e927211ba9cf636b69c33c3cd09db85922dd94

  • SHA512

    22053b04f4ad0e4f16d1a75ac10c01b3274f570bf5410a9601a698575a2fb61588f3923a5485c07519b3135f421b56ce08983c95ca0fd24d6a76fe7306a02746

Malware Config

Targets

    • Target

      4a44d19c6dd86e7051df6055508ad99b.exe

    • Size

      828KB

    • MD5

      4a44d19c6dd86e7051df6055508ad99b

    • SHA1

      44d1fda30e250570c5a6141b1791b48febd5615b

    • SHA256

      869bd0ca39150a6e0f87609ca7e927211ba9cf636b69c33c3cd09db85922dd94

    • SHA512

      22053b04f4ad0e4f16d1a75ac10c01b3274f570bf5410a9601a698575a2fb61588f3923a5485c07519b3135f421b56ce08983c95ca0fd24d6a76fe7306a02746

    • Deletes Windows Defender Definitions

      Uses mpcmdrun utility to delete all AV definitions.

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Disables Task Manager via registry modification

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • Reads user/profile data of web browsers

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

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • 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 Matrix ATT&CK v6

Execution

Command-Line Interface

1
T1059

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Impair Defenses

1
T1562

File Permissions Modification

1
T1222

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

4
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

4
T1005

Tasks