Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-04-2024 19:57

General

  • Target

    33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll

  • Size

    171KB

  • MD5

    430465c4ab9d7ad100dea53703ecfb93

  • SHA1

    c48dabd4dcf30e371f264d74d6c9edd512ec4603

  • SHA256

    33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81

  • SHA512

    f5bea2af23bb3b1eed0a6493443101afadc8b1a30d24d31afd2b2f8bd8bcd052433528c7539610acc127e07fd1b917b371700b2676f6d569c00eb989ca885eb5

  • SSDEEP

    3072:sCx969mf1oCBEyUmY8Hb6smCDpDjL0dbKKHwYLWekmRaMBQoVqy8j2GEctsMYDCh:sCzn9BVUmFH5hpDiqY/LHVl8yhxJgV

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 5 IoCs
  • Blocklisted process makes network request 10 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3668
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\33b85c107eaa0b827d8d86ecc1634a4638243e2ee9817746517e30fcd8a6be81.dll,#1
      2⤵
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Enumerates connected drives
      • Writes to the Master Boot Record (MBR)
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/3052-0-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/3052-1-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/3052-2-0x0000000000C90000-0x0000000000C92000-memory.dmp

    Filesize

    8KB

  • memory/3052-3-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/3052-4-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/3052-6-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/3052-8-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB