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Analysis

  • max time kernel
    161s
  • max time network
    176s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    31/12/2023, 18:55

General

  • Target

    3acb995c9f962f1004397bcbd3fa55dc.exe

  • Size

    260KB

  • MD5

    3acb995c9f962f1004397bcbd3fa55dc

  • SHA1

    8239187c47d046fbd4b76896e78b304624cf2b0c

  • SHA256

    30d5e95f20ff0a384bcbe980cff2cac965301555c50bffb18e37f770957f950c

  • SHA512

    cb32938148716617e8c2b658200799434766d42c68b3aaa35e209f6a47e67bff8fd96661488091b56bdf281e8439fa79e591176dbecb0e0617e5fc4b8c394b2d

  • SSDEEP

    3072:JgfAlNgvh25n/kZoSUjMqXnpWAkpAmTSrMaIOYt/jo7LAtPhjjtZnfHFEoWBfGVK:JdFgTSrMaIl/jcLijfHFEHWzXvjT85R

Score
10/10

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 49 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3acb995c9f962f1004397bcbd3fa55dc.exe
    "C:\Users\Admin\AppData\Local\Temp\3acb995c9f962f1004397bcbd3fa55dc.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1264
    • C:\Users\Admin\yaaob.exe
      "C:\Users\Admin\yaaob.exe"
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:2836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\yaaob.exe

    Filesize

    260KB

    MD5

    dcc938bf6eab01148c1678846a54b05b

    SHA1

    f62db3bb3c4d349264d3f949459e3b2a76e73006

    SHA256

    bc66bd8123fd908847a93f194bdda5f7877c46683bfb662bc2eca7c916b00577

    SHA512

    6c2682148b07fcaf5cc58097cf8df07acf6044f1bc79691a85a12be6fdd32b157e962686abb522faa5b28fbbc05abe7411a3ff6b52743459bd8c5e685188c54e