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Analysis

  • max time kernel
    91s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    01/12/2022, 18:30

General

  • Target

    be9eb79afcf743a7cce147f8597de824a3801405058ebe5f1c93a3e2be8ed46b.exe

  • Size

    306KB

  • MD5

    b4d31796460de48099b671560fcc3499

  • SHA1

    f461422b898da0e0c2f5154e8af4f17889011fd0

  • SHA256

    be9eb79afcf743a7cce147f8597de824a3801405058ebe5f1c93a3e2be8ed46b

  • SHA512

    c9bcdf8edd7af02e154e53035817561f1c5a4a7801d73a884f41d79ce253756d063d89bbc68b0af37e41efa12288c28b374aa0a4a069e69c7a18f0e764a41f14

  • SSDEEP

    6144:YOUyfOlOeb65u5BLxllHFh36pST6pz7FvAuHSX:YOUyCmA5BLbZLqQT65SX

Malware Config

Signatures

  • Sets file execution options in registry 2 TTPs 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 41 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\be9eb79afcf743a7cce147f8597de824a3801405058ebe5f1c93a3e2be8ed46b.exe
    "C:\Users\Admin\AppData\Local\Temp\be9eb79afcf743a7cce147f8597de824a3801405058ebe5f1c93a3e2be8ed46b.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s C:\Windows\system32\la49859.dll
      2⤵
      • Sets file execution options in registry
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Drops file in System32 directory
      • Modifies registry class
      PID:1964

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\la49859.dll

    Filesize

    240KB

    MD5

    44a68340ef53f83e8fb0ffc33ab7e115

    SHA1

    c0ec550b3ed6aafc362fe552896a3e9dc4f81b04

    SHA256

    52f6b0377503192d6509e3a560453e16c0128594c1be5503836e1bc58c7913fe

    SHA512

    64088819d94e0d8245fd4a16a2104898e254204fa23797b0b133c1b3e6a13c7b1d262ba0a7710535573a2eddd2966b10ff8e761ecd143820387a221c7c0ab130

  • \Windows\SysWOW64\la49859.dll

    Filesize

    240KB

    MD5

    44a68340ef53f83e8fb0ffc33ab7e115

    SHA1

    c0ec550b3ed6aafc362fe552896a3e9dc4f81b04

    SHA256

    52f6b0377503192d6509e3a560453e16c0128594c1be5503836e1bc58c7913fe

    SHA512

    64088819d94e0d8245fd4a16a2104898e254204fa23797b0b133c1b3e6a13c7b1d262ba0a7710535573a2eddd2966b10ff8e761ecd143820387a221c7c0ab130

  • memory/1368-54-0x0000000074E41000-0x0000000074E43000-memory.dmp

    Filesize

    8KB