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Analysis

  • max time kernel
    131s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    11/06/2024, 19:39

General

  • Target

    239a145066beb4635d484e7071587174406d9f90b85bccdb8176e70210eac8ab.exe

  • Size

    59KB

  • MD5

    9642cdbed8cbe95aecd3f3bfa300cb79

  • SHA1

    fc2bd4fbed62228fcf795522d374399749bbcb20

  • SHA256

    239a145066beb4635d484e7071587174406d9f90b85bccdb8176e70210eac8ab

  • SHA512

    056a0f37acbf7759eeacd7542bbfde2da46971b1de215e98224e52a23f50358e766f7c509faa20c6d2df9338532217747592889b943fb0d3aa965e1304c924dd

  • SSDEEP

    768:mrItKyw5WHXfQmjIiIk9ecAaU896KyXmuJrjTg+5lPulnp:mr3Z5IfQmv81aU85yXmIjTg4Mp

Score
9/10

Malware Config

Signatures

  • Detects Windows executables referencing non-Windows User-Agents 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

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

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\239a145066beb4635d484e7071587174406d9f90b85bccdb8176e70210eac8ab.exe
    "C:\Users\Admin\AppData\Local\Temp\239a145066beb4635d484e7071587174406d9f90b85bccdb8176e70210eac8ab.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2888
    • C:\Windows\SysWOW64\attrib.exe
      attrib +a +s +h +r C:\Windows\Debug\rwmhost.exe
      2⤵
      • Sets file to hidden
      • Drops file in Windows directory
      • Views/modifies file attributes
      PID:2100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\239A14~1.EXE > nul
      2⤵
      • Deletes itself
      PID:2148
  • C:\Windows\Debug\rwmhost.exe
    C:\Windows\Debug\rwmhost.exe
    1⤵
    • Executes dropped EXE
    PID:2864

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\debug\rwmhost.exe

    Filesize

    59KB

    MD5

    6c0fe786524105b1cb64a26459ad97e6

    SHA1

    14e78799e3f8e33db6791fc067e14e701bd0a89e

    SHA256

    e042479364e189b1b16fc15382fd3f5eec14f5006ff09497379f427317fbb329

    SHA512

    cf6166d85fecd6722ee58a931794e31b7f949d4d9989945e87baa5eb9729e7511684ccc843fa7ef0abaa34b9d1efe647e09908b1863a80a868a13bb7dbc66fad

  • memory/2864-5-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2864-7-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2888-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2888-6-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB