General

  • Target
    6FC-5B-20-FA-7C
  • Size 233KB
  • Sample261029-petxtazse1
  • SHA256 144057e378c3f1f6eb33dc53e9ab6ebe2855f07e1ea2cdb0841c52383f710203
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • acrstealer

Version
  • 4.5.3-alpha1

C2
  • smtp.briskgrab.cc

Decoy
  • cloudflare.com

Attributes
  • guids

    019fd851-d0e2-7805-ae09-2dd1daa78960

    f1575b64-8492-4e8b-b102-4d26e8c70371

  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.2.6187.130 Safari/537.36

xor.hex

Targets

    • Target
      6FC-5B-20-FA-7C
    • Size 233KB
    • SHA256 144057e378c3f1f6eb33dc53e9ab6ebe2855f07e1ea2cdb0841c52383f710203
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Family: ACR stealer,GrMsk

      ACR stealer (aka GrMsk stealer) is an infostealer written in C++.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • 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.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

MITRE ATT&CK Enterprise v16

Tasks