Resubmissions

26-11-2022 08:19

221126-j7yhtaed66 10

25-11-2022 12:27

221125-pmxnnsbe8t 8

24-11-2022 09:51

221124-lvp21seh53 10

24-11-2022 09:44

221124-lqgvvahf3x 10

General

  • Target

    file.exe

  • Size

    1.4MB

  • Sample

    221126-j7yhtaed66

  • MD5

    073a3dc0c60492b618f888c5e603fd05

  • SHA1

    4de52c57f8f032724452e901120bcf0fbee52902

  • SHA256

    f4fcbc524c30e4469464eb1c5641577b1042bd6fb5f44835731a3ee156d29c27

  • SHA512

    4262dd0e07f0d083c75607a0a67e20b8b8f85c57aeeba2359cc92731a82ba9d2191482cb3d28c7c8f1163b0d9604bf1cfba5ffe168ad7bb6fc7c1c11c99c0d7f

  • SSDEEP

    24576:W+wHtwQBTvwpeNrT2i8k57TujjVx3KClNyOiY:W+sBTopej8Mw3NlNF

Malware Config

Targets

    • Target

      file.exe

    • Size

      1.4MB

    • MD5

      073a3dc0c60492b618f888c5e603fd05

    • SHA1

      4de52c57f8f032724452e901120bcf0fbee52902

    • SHA256

      f4fcbc524c30e4469464eb1c5641577b1042bd6fb5f44835731a3ee156d29c27

    • SHA512

      4262dd0e07f0d083c75607a0a67e20b8b8f85c57aeeba2359cc92731a82ba9d2191482cb3d28c7c8f1163b0d9604bf1cfba5ffe168ad7bb6fc7c1c11c99c0d7f

    • SSDEEP

      24576:W+wHtwQBTvwpeNrT2i8k57TujjVx3KClNyOiY:W+sBTopej8Mw3NlNF

    • Modifies security service

    • Modifies system executable filetype association

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • xmrig

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

    • XMRig Miner payload

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Registers COM server for autorun

    • Stops running service(s)

    • Checks computer location settings

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

    • Loads dropped DLL

    • 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.

    • Unexpected DNS network traffic destination

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

    • Uses the VBS compiler for execution

    • Accesses 2FA software files, possible credential harvesting

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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 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

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks