General

  • Target

    4bc3ff2b16d79186fbd45bebe9dd0e093bc95b3522b3ade1e1f00e8d78e3ac92

  • Size

    622KB

  • Sample

    210511-93mfhqwx4s

  • MD5

    dc8ef30ed6f9809dcdc4888b161f4453

  • SHA1

    19f713ce5df86525fa9149946da24d993fb605f6

  • SHA256

    4bc3ff2b16d79186fbd45bebe9dd0e093bc95b3522b3ade1e1f00e8d78e3ac92

  • SHA512

    aadf3cce5c80180bf5661b7ce4784477209413abaf7a31182b59e6adc56b17644d5dab17381a9f56e40105ee66abaa52174839b08e40cc9146ad29765bd588ef

Malware Config

Targets

    • Target

      4bc3ff2b16d79186fbd45bebe9dd0e093bc95b3522b3ade1e1f00e8d78e3ac92

    • Size

      622KB

    • MD5

      dc8ef30ed6f9809dcdc4888b161f4453

    • SHA1

      19f713ce5df86525fa9149946da24d993fb605f6

    • SHA256

      4bc3ff2b16d79186fbd45bebe9dd0e093bc95b3522b3ade1e1f00e8d78e3ac92

    • SHA512

      aadf3cce5c80180bf5661b7ce4784477209413abaf7a31182b59e6adc56b17644d5dab17381a9f56e40105ee66abaa52174839b08e40cc9146ad29765bd588ef

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Executes dropped EXE

    • Modifies extensions of user files

      Ransomware generally changes the extension on encrypted files.

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Hidden Files and Directories

1
T1158

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Bypass User Account Control

1
T1088

Defense Evasion

Modify Registry

6
T1112

Hidden Files and Directories

1
T1158

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Tasks