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Analysis

  • max time kernel
    140s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    04/06/2024, 01:52

General

  • Target

    b5f8892249e83bf069f1253c2af3219e4471025855f315472ab9b787c9abd5c6.dll

  • Size

    89KB

  • MD5

    c944bb0548937bcaeb27b59efd866912

  • SHA1

    59fb5f7d37690f950edf70ce7dd8abb1d634d3d3

  • SHA256

    b5f8892249e83bf069f1253c2af3219e4471025855f315472ab9b787c9abd5c6

  • SHA512

    2b644352fd9209f0f4f1976b2ec57cb058c98667dc385c2d0edb630d3a210df6122f207b735bc136ebc5b822ca5308a9c5c7019daf0e9381f6bf3d9f373c2a4e

  • SSDEEP

    1536:XHXqO6ZG03eyenOj9lgA/PObuTMT5NMCfL7ojaZf5aZlBlG7:M1uF6Feu2NlQOBcG7

Malware Config

Signatures

  • Detects executables containing base64 encoded User Agent 3 IoCs
  • UPX dump on OEP (original entry point) 4 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5f8892249e83bf069f1253c2af3219e4471025855f315472ab9b787c9abd5c6.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5f8892249e83bf069f1253c2af3219e4471025855f315472ab9b787c9abd5c6.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:1524

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1524-1-0x0000000010000000-0x0000000010033000-memory.dmp

    Filesize

    204KB

  • memory/1524-0-0x0000000010000000-0x0000000010033000-memory.dmp

    Filesize

    204KB

  • memory/1524-2-0x0000000010000000-0x0000000010033000-memory.dmp

    Filesize

    204KB

  • memory/1524-6-0x0000000010000000-0x0000000010033000-memory.dmp

    Filesize

    204KB

  • memory/1524-7-0x0000000010000000-0x0000000010033000-memory.dmp

    Filesize

    204KB