General

  • Target

    4736228698b5bb9b7dc86f4dbfe539e54fe5f5153be6c4aec7b8269e34c7a84b

  • Size

    379KB

  • Sample

    240516-24nhjsdd93

  • MD5

    009669d63111ff8efad651efac7333af

  • SHA1

    d0ebf3a228e2d44e094aa3b1b056176bc05c8f40

  • SHA256

    4736228698b5bb9b7dc86f4dbfe539e54fe5f5153be6c4aec7b8269e34c7a84b

  • SHA512

    dbf32ce7ba68fa88f508bced74b898baa73679216374d885e279eaf848c8f197294f66a0131491050f70f93413d973cc1fe7245e8128758a6103a453e7aed808

  • SSDEEP

    6144:ooBTI0waxzM7qRZqdkqiG5ZCpj5BRlYoVMvtLBBd/0ZpnVYJOmk64:ooBTzwIzMmAxiG5ZC3lYoVcL9/0Dn2Jy

Malware Config

Extracted

Family

gcleaner

C2

185.172.128.90

5.42.64.56

5.42.65.64

Targets

    • Target

      4736228698b5bb9b7dc86f4dbfe539e54fe5f5153be6c4aec7b8269e34c7a84b

    • Size

      379KB

    • MD5

      009669d63111ff8efad651efac7333af

    • SHA1

      d0ebf3a228e2d44e094aa3b1b056176bc05c8f40

    • SHA256

      4736228698b5bb9b7dc86f4dbfe539e54fe5f5153be6c4aec7b8269e34c7a84b

    • SHA512

      dbf32ce7ba68fa88f508bced74b898baa73679216374d885e279eaf848c8f197294f66a0131491050f70f93413d973cc1fe7245e8128758a6103a453e7aed808

    • SSDEEP

      6144:ooBTI0waxzM7qRZqdkqiG5ZCpj5BRlYoVMvtLBBd/0ZpnVYJOmk64:ooBTzwIzMmAxiG5ZC3lYoVcL9/0Dn2Jy

    • GCleaner

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

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • Modifies firewall policy service

    • PrivateLoader

      PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

    • UAC bypass

    • Windows security bypass

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Modifies boot configuration data using bcdedit

    • XMRig Miner payload

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Modifies Windows Firewall

    • Possible attempt to disable PatchGuard

      Rootkits can use kernel patching to embed themselves in an operating system.

    • Sets service image path in registry

    • Stops running service(s)

    • 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.

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • UPX packed file

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

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Windows security modification

    • 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.

    • Checks whether UAC is enabled

    • Drops Chrome extension

    • Enumerates connected drives

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

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Manipulates WinMon driver.

      Roottkits write to WinMon to hide PIDs from being detected.

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Maps connected drives based on registry

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks