General

  • Target

    backroom_with_scary_entity_puHviNTok8vwhwDwDsxe_7.jpg

  • Size

    405KB

  • Sample

    230403-x7y18sae5z

  • MD5

    ba4118fdcf2015b1eeba1c75500fac38

  • SHA1

    132329cc1fa23f8d57e4ce930409d04790a52fff

  • SHA256

    1be4b2b992d06461f953d9c85e797cf004d19121e5226ec2f1e2d087d7f53947

  • SHA512

    eb4b03b0248a6a1b906b77c66fbfd5377df97d44cef88bcb2178f5f95eea68831860737d3f031ec21a7555da1d69f1dfc95fad8f848e52babb736185ef106590

  • SSDEEP

    12288:p7qsWSHtEpMIAvousin3+lm7wh0ZO2fVApMt:dqiaKoPc33JZHGCt

Malware Config

Extracted

Family

gcleaner

C2

85.31.45.39

85.31.45.250

85.31.45.251

85.31.45.88

Targets

    • Target

      backroom_with_scary_entity_puHviNTok8vwhwDwDsxe_7.jpg

    • Size

      405KB

    • MD5

      ba4118fdcf2015b1eeba1c75500fac38

    • SHA1

      132329cc1fa23f8d57e4ce930409d04790a52fff

    • SHA256

      1be4b2b992d06461f953d9c85e797cf004d19121e5226ec2f1e2d087d7f53947

    • SHA512

      eb4b03b0248a6a1b906b77c66fbfd5377df97d44cef88bcb2178f5f95eea68831860737d3f031ec21a7555da1d69f1dfc95fad8f848e52babb736185ef106590

    • SSDEEP

      12288:p7qsWSHtEpMIAvousin3+lm7wh0ZO2fVApMt:dqiaKoPc33JZHGCt

    • GCleaner

      GCleaner is a Pay-Per-Install malware loader first discovered in early 2019.

    • Blocklisted process makes network request

    • Creates new service(s)

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • Drops Chrome extension

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

New Service

1
T1050

Registry Run Keys / Startup Folder

2
T1060

Scheduled Task

1
T1053

Privilege Escalation

New Service

1
T1050

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

8
T1012

System Information Discovery

7
T1082

Security Software Discovery

1
T1063

Network Service Scanning

1
T1046

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

1
T1005

Tasks