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Analysis

  • max time kernel
    140s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    13/05/2024, 11:56

General

  • Target

    office2019pjb_9435/office2019pjb/OTool/files/Thunder/zlib1.dll

  • Size

    35KB

  • MD5

    57e11cb59cff3bce88681847d807cf06

  • SHA1

    44e79ea0787acfecba8f73360529d760a8e41cf9

  • SHA256

    a21616050ed5f1bb9e1325089b5d1411da8f12e0060280e5ef41f80eed214066

  • SHA512

    fd43895c72d9c2f001dc1105d2d76288df21fa46b7b8bce8ba9c48f49c48d21f49e9da00906844cee465270739a7c5c024ba04399801b515705a343c7209330f

  • SSDEEP

    768:YR6aROh/8QQAwMydtssQfHFfxKmbK6PAraKBHsEoJKSnnbcuyD7UT9rRK:4c8n7bdt4flfxfKvlBHjoJKSnnouy8Ty

Score
7/10
upx

Malware Config

Signatures

  • UPX packed file 2 IoCs

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

  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\office2019pjb_9435\office2019pjb\OTool\files\Thunder\zlib1.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2316
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\office2019pjb_9435\office2019pjb\OTool\files\Thunder\zlib1.dll,#1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1652
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 224
        3⤵
        • Program crash
        PID:2196

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • memory/1652-1-0x00000000215B0000-0x00000000215C6000-memory.dmp

    Filesize

    88KB

  • memory/1652-0-0x00000000215B0000-0x00000000215C6000-memory.dmp

    Filesize

    88KB

  • memory/1652-2-0x00000000215B0000-0x00000000215C6000-memory.dmp

    Filesize

    88KB