Analysis

  • max time kernel
    94s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-10-2024 04:56

General

  • Target

    8e50577e94a3638908c05be5df1f482e40ebcaaaf71bbc801031770c1e337daeN.exe

  • Size

    90KB

  • MD5

    d1967e784a6e8b6dab51c2b1396622d0

  • SHA1

    b1a534ec8a8a893ca9204091695710204e81e6e9

  • SHA256

    8e50577e94a3638908c05be5df1f482e40ebcaaaf71bbc801031770c1e337dae

  • SHA512

    2fe3a83d5bec55100e9857038cfed2a9c706135b6d898f3a874d1ceaa59c1ae65f520b53f4d02aa6778c514fccede9357092e9c6384e30266a1cc0e4c5122cad

  • SSDEEP

    1536:XRsjdLaslqdBXvTUL0Hnouy8VjsRsjdLaslqdBXvTUL0Hnouy8Vj:XOJKqsout9sOJKqsout9

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 2 IoCs
  • Disables use of System Restore points 1 TTPs
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 13 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Drops file in System32 directory 6 IoCs
  • UPX packed file 17 IoCs

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

  • Drops file in Windows directory 2 IoCs
  • 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.

  • Modifies Control Panel 4 IoCs
  • Modifies registry class 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8e50577e94a3638908c05be5df1f482e40ebcaaaf71bbc801031770c1e337daeN.exe
    "C:\Users\Admin\AppData\Local\Temp\8e50577e94a3638908c05be5df1f482e40ebcaaaf71bbc801031770c1e337daeN.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies visibility of file extensions in Explorer
    • Modifies visiblity of hidden/system files in Explorer
    • Disables RegEdit via registry modification
    • Modifies system executable filetype association
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4224
    • C:\Windows\xk.exe
      C:\Windows\xk.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4784
    • C:\Windows\SysWOW64\IExplorer.exe
      C:\Windows\system32\IExplorer.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4212
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4432
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3080
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2212
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3668
    • C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
      "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:404

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE

    Filesize

    90KB

    MD5

    9b906fae9fbb67d83730c36582783ffc

    SHA1

    ea3a68e456646fb00a8ca14231c28029e09b3328

    SHA256

    f4f516db8c78fb5a2c3504f994aa7b514adb7c942cec84295909eb971d91054f

    SHA512

    443a74ef8beeb999d4e7f2f406f940e84695eb730e7d9059c19ae520fb764dd12a810ffbcf3545ba298c0ca3fda6c7e747be4e7564038a811914d9ef2d8f7859

  • C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE

    Filesize

    90KB

    MD5

    152665372905c827c32162010cdda71f

    SHA1

    57201ba9ed0e94b8c5f64a7954dceda3f0cfa0f6

    SHA256

    297b893739d2a3dba983df3c9ff0679dacddcfc47e9dafa6f859b43ab33eae8c

    SHA512

    0be21a84d6087aa3ca9329ecb492f8b755de7170e68a3938963f355e0f2a8ff212988f7c9cf696a494e1990cc8a6169d086419b9ae887c5604be27e72344a20e

  • C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE

    Filesize

    90KB

    MD5

    3742ee9c9500ca321c01ef8c102aa626

    SHA1

    40129fd36c840aa4c3a811986c2c0557cccc9020

    SHA256

    e97c1d83075ec2d893a5a303ce3fccab52c54e384f44af659625d797679ef4ae

    SHA512

    befb6d62f5b73355496746b628ed4794a7b653ae59066ae4086138249fb79e9b951054c87c6c5308cff65d2eb074295cf8e549053d623394fe34cf17fdd083eb

  • C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE

    Filesize

    90KB

    MD5

    28b6a32abd8bc7f219023275cd923d77

    SHA1

    f9c56bba0bda7555da0c030c78568aff7600ce69

    SHA256

    34f43abca85733a5110cf71b90cce30bde1850ea34378d297a7e08c7d0d81470

    SHA512

    d1ac12f5495fafc7af3ce76dbe80f7890b03d0d4b16c58227b71c724d2e3bbbccb30a8ef1cb74d8324721d2066f81600032db7a88eae1c3ec814b7bcd9366193

  • C:\Users\Admin\AppData\Local\winlogon.exe

    Filesize

    90KB

    MD5

    d1967e784a6e8b6dab51c2b1396622d0

    SHA1

    b1a534ec8a8a893ca9204091695710204e81e6e9

    SHA256

    8e50577e94a3638908c05be5df1f482e40ebcaaaf71bbc801031770c1e337dae

    SHA512

    2fe3a83d5bec55100e9857038cfed2a9c706135b6d898f3a874d1ceaa59c1ae65f520b53f4d02aa6778c514fccede9357092e9c6384e30266a1cc0e4c5122cad

  • C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE

    Filesize

    90KB

    MD5

    f3bee1589594cd28709ae41b30ff630a

    SHA1

    d3a7e5ae26049ea09556e37a7aef1c890b2b9cc9

    SHA256

    c862dd354638ed89ba9a455b7e76e2ed3baa7ab84b466164f56c87516a7b66c7

    SHA512

    640bfcce932aba872db825d9095e96edb6ebfb86d136c93699d288c888997d8f3393be6c21f0ca08895c51d2f7c4076928ae49fb8b72a479046329481ac8d5bb

  • C:\Windows\SysWOW64\IExplorer.exe

    Filesize

    90KB

    MD5

    c05b7e11aa55ad5c1f0ccb99a96b0e50

    SHA1

    c427bcf36c121799e7d44b145b8186846930d0fb

    SHA256

    ba0e44425eb1538d19a75e956fed179de6d3cfd4db05571f60dbe5977ed11864

    SHA512

    9a6eb09d95900d4b806edef7ecc0ec4415177d20da8f661f3b96985857e6be78cf4862a2df437e790028632e85faff015110027d3d26d45738457c127db15c64

  • C:\Windows\xk.exe

    Filesize

    90KB

    MD5

    48f125477cee9b1eaa7e81dbf636139d

    SHA1

    10a0ccd05c6d2c2ffa8e3f566967a17947c22a6d

    SHA256

    fde7b1c119548909fdc9815c71cd8f76db773bfec52c70bbc0302324213c0cd2

    SHA512

    76b8fd32cffe53c0489c7c58f676a46f58eb49d39a5a12de6b17b23cb4917515f92e967434a4f15204b97ad163bc6ec057107dd5bdc459d350c865d3af5572c4

  • memory/404-151-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/2212-139-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/3080-131-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/3668-144-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4212-118-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4224-0-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4224-152-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4432-127-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4784-112-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB