General

  • Target

    41CCF2991FAF22D76A6D0F1BC576676C.exe

  • Size

    530KB

  • Sample

    210610-n8636pf7vn

  • MD5

    41ccf2991faf22d76a6d0f1bc576676c

  • SHA1

    33a81d32c114e65434f2213ef78d78674d23c1dd

  • SHA256

    20593dd40ac0559ee48756078596dc482d5c1ee417518988777e34c174c01d3c

  • SHA512

    f955b48e761116ed2b18ed899bbe201f8327c08ad0f911852be0688d16b37798eba3202a1e89cec5ad0015fdbee9c8a3f387fe1ac6a37d136ed5b2b21f992699

Malware Config

Extracted

Family

vidar

Version

39.3

Botnet

915

C2

https://bandakere.tumblr.com

Attributes
  • profile_id

    915

Targets

    • Target

      41CCF2991FAF22D76A6D0F1BC576676C.exe

    • Size

      530KB

    • MD5

      41ccf2991faf22d76a6d0f1bc576676c

    • SHA1

      33a81d32c114e65434f2213ef78d78674d23c1dd

    • SHA256

      20593dd40ac0559ee48756078596dc482d5c1ee417518988777e34c174c01d3c

    • SHA512

      f955b48e761116ed2b18ed899bbe201f8327c08ad0f911852be0688d16b37798eba3202a1e89cec5ad0015fdbee9c8a3f387fe1ac6a37d136ed5b2b21f992699

    • Modifies Windows Defender Real-time Protection settings

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Checks for common network interception software

      Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

    • Vidar Stealer

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • UPX packed file

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

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • Checks computer location settings

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

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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.

    • 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

    • 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