General

  • Target

    tmp

  • Size

    1.4MB

  • Sample

    230531-nrq61sfa4s

  • MD5

    8db8ac6d19be3b52641ea16e209b9ea4

  • SHA1

    602bcfe9d5721eb745984cd78282493123a6cdf4

  • SHA256

    e7dceabe18dfe33021fa25c3b804bc1301e59f76718742b5eb26f3979086c3e0

  • SHA512

    301676215c3591ad203e141add1236f26fe999ee492e545d8b64f2047d11f5d2b5b210f8cf318bfdd1a53a215e02dcd14480e9d3508e021dec296e1dd255ed91

  • SSDEEP

    24576:vFBr1R5kl7kHeIg+jQ0SBpxhtL6VEP5bCKCyzHAc:vX5yQ+IVUv5bCKCV

Malware Config

Targets

    • Target

      tmp

    • Size

      1.4MB

    • MD5

      8db8ac6d19be3b52641ea16e209b9ea4

    • SHA1

      602bcfe9d5721eb745984cd78282493123a6cdf4

    • SHA256

      e7dceabe18dfe33021fa25c3b804bc1301e59f76718742b5eb26f3979086c3e0

    • SHA512

      301676215c3591ad203e141add1236f26fe999ee492e545d8b64f2047d11f5d2b5b210f8cf318bfdd1a53a215e02dcd14480e9d3508e021dec296e1dd255ed91

    • SSDEEP

      24576:vFBr1R5kl7kHeIg+jQ0SBpxhtL6VEP5bCKCyzHAc:vX5yQ+IVUv5bCKCV

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

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

    • UAC bypass

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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 installed software on the system

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

    • Checks whether UAC is enabled

    • 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

Scheduled Task

1
T1053

Persistence

Winlogon Helper DLL

1
T1004

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

6
T1112

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Collection

Data from Local System

1
T1005

Tasks