General

  • Target

    a0e3a64e0e6aee3370ccbbca59f8ae0b34be674963c1dabe14926b24fdcae7d0

  • Size

    2.7MB

  • Sample

    240516-3sk4qafa83

  • MD5

    731ff38afbc5a664f5a458e222d91f84

  • SHA1

    5105f89898a3d9e5b5b52ddcd7d0a3b167aaf701

  • SHA256

    a0e3a64e0e6aee3370ccbbca59f8ae0b34be674963c1dabe14926b24fdcae7d0

  • SHA512

    910b1c9fb8e28c3f24d35a875ff86f3ab2e2c573797e078ece204538a3bdc6d42bc92531197e57be577ffb2e4cacdd53fec6a61843e6c69be4794e68506f68c3

  • SSDEEP

    24576:3RoBHi3buy4toE1jC6Ayo2xhWLbSPlqRvc68XzRVGvxB5VA0UC1dUUKj/OZ8j3g3:BoKmo4jC6TovDRUC1doj/Tg3

Malware Config

Extracted

Family

gcleaner

C2

185.172.128.90

5.42.64.56

5.42.65.64

Targets

    • Target

      a0e3a64e0e6aee3370ccbbca59f8ae0b34be674963c1dabe14926b24fdcae7d0

    • Size

      2.7MB

    • MD5

      731ff38afbc5a664f5a458e222d91f84

    • SHA1

      5105f89898a3d9e5b5b52ddcd7d0a3b167aaf701

    • SHA256

      a0e3a64e0e6aee3370ccbbca59f8ae0b34be674963c1dabe14926b24fdcae7d0

    • SHA512

      910b1c9fb8e28c3f24d35a875ff86f3ab2e2c573797e078ece204538a3bdc6d42bc92531197e57be577ffb2e4cacdd53fec6a61843e6c69be4794e68506f68c3

    • SSDEEP

      24576:3RoBHi3buy4toE1jC6Ayo2xhWLbSPlqRvc68XzRVGvxB5VA0UC1dUUKj/OZ8j3g3:BoKmo4jC6TovDRUC1doj/Tg3

    • 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

    • Windows security bypass

    • xmrig

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

    • Enumerates VirtualBox registry keys

    • Modifies boot configuration data using bcdedit

    • 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.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • 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 local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • 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.

    • 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

    • Drops desktop.ini file(s)

    • 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

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks