Analysis

  • max time kernel
    143s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    28/12/2023, 21:31

General

  • Target

    f9881c6c96dbc5d18764ba0a11b45f91.dll

  • Size

    127KB

  • MD5

    f9881c6c96dbc5d18764ba0a11b45f91

  • SHA1

    b572ff448413b40259b48b288eb8c91e70b6186c

  • SHA256

    e55c7b3a56b807f31c8d68bf8c157da9e80522a60a3e4d3be90e101ff85c9ef8

  • SHA512

    4bce771d25286fce7570165e82dadf6f6dbbac1760afd7bd2f0c6262c2509b7c595b1c963b4a83314fcf5ae39779081ffdc905360351ba5fdd73e2c52fc8300c

  • SSDEEP

    3072:ifC0OGQDdZJPESvZPHojlJ6+NOctcUoDthgM3X73OL5PFn0wcccccccc:MfOBvvVHojq+FoDAs30PFn0wcccccccc

Score
8/10

Malware Config

Signatures

  • Blocklisted process makes network request 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\f9881c6c96dbc5d18764ba0a11b45f91.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2496
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\f9881c6c96dbc5d18764ba0a11b45f91.dll,#1
      2⤵
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1636
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\System32\rundll32.exe" "C:\Users\Admin\AppData\Local\Temp\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D}\5b09.dll",DllGetClassObject secret 40558
        3⤵
        • Blocklisted process makes network request
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        PID:2748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\{2AC8DCF3-2469-410F-9D17-79AF6A5E387D}\5b09.dll

    Filesize

    127KB

    MD5

    f9881c6c96dbc5d18764ba0a11b45f91

    SHA1

    b572ff448413b40259b48b288eb8c91e70b6186c

    SHA256

    e55c7b3a56b807f31c8d68bf8c157da9e80522a60a3e4d3be90e101ff85c9ef8

    SHA512

    4bce771d25286fce7570165e82dadf6f6dbbac1760afd7bd2f0c6262c2509b7c595b1c963b4a83314fcf5ae39779081ffdc905360351ba5fdd73e2c52fc8300c

  • memory/1636-1-0x0000000001F30000-0x0000000002030000-memory.dmp

    Filesize

    1024KB

  • memory/1636-0-0x0000000074D20000-0x0000000074D4B000-memory.dmp

    Filesize

    172KB

  • memory/1636-3-0x0000000074D20000-0x0000000074D4B000-memory.dmp

    Filesize

    172KB

  • memory/1636-11-0x0000000001F30000-0x0000000002030000-memory.dmp

    Filesize

    1024KB

  • memory/1636-15-0x0000000074D20000-0x0000000074D4B000-memory.dmp

    Filesize

    172KB

  • memory/2748-12-0x0000000074920000-0x000000007494B000-memory.dmp

    Filesize

    172KB

  • memory/2748-13-0x00000000009A0000-0x0000000000AA0000-memory.dmp

    Filesize

    1024KB

  • memory/2748-16-0x0000000074920000-0x000000007494B000-memory.dmp

    Filesize

    172KB

  • memory/2748-18-0x0000000074920000-0x000000007494B000-memory.dmp

    Filesize

    172KB

  • memory/2748-20-0x00000000009A0000-0x0000000000AA0000-memory.dmp

    Filesize

    1024KB