Analysis

  • max time kernel
    119s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    19-08-2024 03:10

General

  • Target

    21dbc8bf435da3844fe87d4d81e4ba50N.exe

  • Size

    284KB

  • MD5

    21dbc8bf435da3844fe87d4d81e4ba50

  • SHA1

    fbd9b966f1b50c99521127c477a8c3cde96fc14f

  • SHA256

    c0c67ac11ce4010268dea559f2b08b21d8ef6f49f48d2786cc1fdfb556397546

  • SHA512

    9d491b7e346d9c4b910e74e4b774af1c691c2dc844804546a2f886072c5dac2ca243136d56bb80d542d8f4768c5f924b5994fe57be90ab298358ba1c56d9527b

  • SSDEEP

    3072:mSQ0EWVwZhKxC5Rt+k60Zh+qw6PYSsszfHZTZJ2lC:mPA6wxmuJspr2l

Malware Config

Signatures

  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 5 IoCs
  • UPX packed file 9 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\21dbc8bf435da3844fe87d4d81e4ba50N.exe
    "C:\Users\Admin\AppData\Local\Temp\21dbc8bf435da3844fe87d4d81e4ba50N.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2820
    • C:\Users\Admin\AppData\Local\Temp\21dbc8bf435da3844fe87d4d81e4ba50N.exe
      "C:\Users\Admin\AppData\Local\Temp\21dbc8bf435da3844fe87d4d81e4ba50N.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:183788
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\OJNKK.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:184076
        • C:\Windows\SysWOW64\reg.exe
          REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Skype" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe" /f
          4⤵
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:184132
      • C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
        "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:184156
        • C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
          "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:107968
        • C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
          "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
          4⤵
          • Executes dropped EXE
          • Maps connected drives based on registry
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:108044
          • C:\Windows\syswow64\svchost.exe
            C:\Windows\syswow64\svchost.exe
            5⤵
            • Adds policy Run key to start application
            • Drops file in Program Files directory
            • System Location Discovery: System Language Discovery
            PID:108088

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\OJNKK.bat

    Filesize

    139B

    MD5

    0654f004b2e314bad7f75867e91da37d

    SHA1

    4232c22e7340b12108d86e3cb35ed288a3dbc7f1

    SHA256

    ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

    SHA512

    dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

  • \Users\Admin\AppData\Roaming\skype\skyrpe.exe

    Filesize

    284KB

    MD5

    129864173b98df5adf01bd885cc3dcb2

    SHA1

    d27a493c971d6cc525d11c17f3d8824ee091c9fc

    SHA256

    993342de2d772174f1f5008ac4a9b789283a53d96e829d3e8d9f0608e9bfe78c

    SHA512

    bad5993df8c49e7829ec80df96be5ed79f6fddcd815e43187ba2f965640c26139e53c53f7bf9c6f50f2662759bbd69a41c6f40426e4b13a76da486bcad1db28f

  • memory/2820-9100-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9118-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9119-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9099-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9117-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9116-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9115-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9113-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9112-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9111-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9110-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9109-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9108-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9107-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9106-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9098-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9104-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9103-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9102-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9101-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-2-0x00000000003E0000-0x00000000003E1000-memory.dmp

    Filesize

    4KB

  • memory/2820-9120-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9105-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9097-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9096-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9095-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9094-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9093-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9114-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9000-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/2820-9121-0x0000000000090000-0x0000000000190000-memory.dmp

    Filesize

    1024KB

  • memory/107968-106966-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/108044-106965-0x0000000000400000-0x0000000000405000-memory.dmp

    Filesize

    20KB

  • memory/183788-53487-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53486-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53483-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53481-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53479-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53485-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/183788-53488-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53497-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-53683-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB

  • memory/183788-106973-0x0000000000400000-0x000000000040B000-memory.dmp

    Filesize

    44KB