General

  • Target

    NorthAmerica.exe

  • Size

    379KB

  • Sample

    240517-cfat4sce69

  • MD5

    f1d6adcf82bb1209ec185d9f868a5e6a

  • SHA1

    ddbe72c7352697047ca8c334f6ac3636455bd019

  • SHA256

    eb28b0824e287f2ce81c39f94f98399df3aad26f9209511d56ecf01ae1eb707d

  • SHA512

    8efe15f757fb88c3a22689e6fb738bbd1cd467cea75f8a07f55fcf46c2ae725274ea46d865efe201f6d6d7362347000c1c7f0c398fbf35f1f86795f27a87a482

  • SSDEEP

    6144:AoAyhP4PIXceIg0s1JaQrlnFhnrtmJETXKiSr03K62NjbweWw5zmqiWQwrsDjnCB:AoAyBfdvaElLrtmJgXKiSrD62NjWwhmk

Malware Config

Extracted

Family

gcleaner

C2

185.172.128.90

5.42.64.56

5.42.65.64

Targets

    • Target

      NorthAmerica.exe

    • Size

      379KB

    • MD5

      f1d6adcf82bb1209ec185d9f868a5e6a

    • SHA1

      ddbe72c7352697047ca8c334f6ac3636455bd019

    • SHA256

      eb28b0824e287f2ce81c39f94f98399df3aad26f9209511d56ecf01ae1eb707d

    • SHA512

      8efe15f757fb88c3a22689e6fb738bbd1cd467cea75f8a07f55fcf46c2ae725274ea46d865efe201f6d6d7362347000c1c7f0c398fbf35f1f86795f27a87a482

    • SSDEEP

      6144:AoAyhP4PIXceIg0s1JaQrlnFhnrtmJETXKiSr03K62NjbweWw5zmqiWQwrsDjnCB:AoAyBfdvaElLrtmJgXKiSrD62NjWwhmk

    • 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 Windows Defender Real-time Protection settings

    • UAC bypass

    • Windows security bypass

    • xmrig

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

    • Modifies boot configuration data using bcdedit

    • XMRig Miner payload

    • Blocklisted process makes network request

    • 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 Windows Firewall

    • Possible attempt to disable PatchGuard

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

    • 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

    • Reads user/profile data of web browsers

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

    • UPX packed file

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

    • Windows security modification

    • 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

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • 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.

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks