Analysis

  • max time kernel
    93s
  • max time network
    102s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-12-2024 03:38

General

  • Target

    b164e643c2d8fdb91002dbc3cb445d39e54246e2373a9756f2280ad5ff585b74N.dll

  • Size

    256KB

  • MD5

    b838ca54e54cd92aaeaed413b57a43c0

  • SHA1

    75910bf07c400d133168de2e529ae17495addcae

  • SHA256

    b164e643c2d8fdb91002dbc3cb445d39e54246e2373a9756f2280ad5ff585b74

  • SHA512

    dc1c604a162e0a6ddbb28f65d461fb45d421c25378aedc2af6881ac77b5a000e87680acaaa0c08aa035101bf9054b232d6b1c48130fe5869fa73ae9194900bb4

  • SSDEEP

    3072:QKomU8Ty/v/eSPZwozPixqI13GKkjPmIb8GTuXHHetkqcqvnhzduNC:foSTE4xqI+P5TuXHHel/VgNC

Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • UPX packed file 3 IoCs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\b164e643c2d8fdb91002dbc3cb445d39e54246e2373a9756f2280ad5ff585b74N.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1040
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\b164e643c2d8fdb91002dbc3cb445d39e54246e2373a9756f2280ad5ff585b74N.dll,#1
      2⤵
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2344
      • C:\Windows\SysWOW64\rundll32mgr.exe
        C:\Windows\SysWOW64\rundll32mgr.exe
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3724
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3724 -s 264
          4⤵
          • Program crash
          PID:5108
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3724 -ip 3724
    1⤵
      PID:116

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\SysWOW64\rundll32mgr.exe

      Filesize

      105KB

      MD5

      dfb5daabb95dcfad1a5faf9ab1437076

      SHA1

      4a199569a9b52911bee7fb19ab80570cc5ff9ed1

      SHA256

      54282ec29d4993ed6e9972122cfbb70bba4898a21d527bd9e72a166d7ec2fdc0

      SHA512

      5d31c34403ab5f8db4a6d84f2b5579d4ea18673914b626d78e458a648ac20ddd8e342818e807331036d7bb064f596a02b9737acac42fbead29260343a30717e8

    • memory/2344-0-0x0000000010000000-0x0000000010043000-memory.dmp

      Filesize

      268KB

    • memory/3724-4-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB

    • memory/3724-6-0x0000000000580000-0x0000000000581000-memory.dmp

      Filesize

      4KB

    • memory/3724-7-0x0000000000400000-0x000000000045B000-memory.dmp

      Filesize

      364KB