General

  • Target

    2b2ac834ce580b63ad8eae3e117dca50ea605e64dd2d9a8c1cfd8fd2ba204bd9

  • Size

    747KB

  • Sample

    240516-2s8pcacf92

  • MD5

    66d66dbeff38b323bc8993d947731a57

  • SHA1

    90870ab86e7a590eba00df04efa9679580931e33

  • SHA256

    2b2ac834ce580b63ad8eae3e117dca50ea605e64dd2d9a8c1cfd8fd2ba204bd9

  • SHA512

    eeb3bf0e0844f231e902c28d16eec130a27845e4ffa9abee4230ce0bd78e0116d509d537e4fa5589c50c5056a990506e3a03a86c43d67f1859d59e72c21209ef

  • SSDEEP

    12288:1BbNOGvBdkAX5oKi07Uygt6WoOOu6hrwvZZXTALei9RJGtDmDP:1BVk0riZdUzfu6UycmL

Malware Config

Extracted

Family

gcleaner

C2

185.172.128.90

5.42.64.56

5.42.65.64

Targets

    • Target

      2b2ac834ce580b63ad8eae3e117dca50ea605e64dd2d9a8c1cfd8fd2ba204bd9

    • Size

      747KB

    • MD5

      66d66dbeff38b323bc8993d947731a57

    • SHA1

      90870ab86e7a590eba00df04efa9679580931e33

    • SHA256

      2b2ac834ce580b63ad8eae3e117dca50ea605e64dd2d9a8c1cfd8fd2ba204bd9

    • SHA512

      eeb3bf0e0844f231e902c28d16eec130a27845e4ffa9abee4230ce0bd78e0116d509d537e4fa5589c50c5056a990506e3a03a86c43d67f1859d59e72c21209ef

    • SSDEEP

      12288:1BbNOGvBdkAX5oKi07Uygt6WoOOu6hrwvZZXTALei9RJGtDmDP:1BVk0riZdUzfu6UycmL

    • 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

    • 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

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Modifies Windows Firewall

    • 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

    • 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.

    • Legitimate hosting services abused for malware hosting/C2

    • 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