Analysis

  • max time kernel
    134s
  • max time network
    54s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    13-05-2021 12:53

General

  • Target

    f48a7dd16b186a612101118825d9149e5bdbdd73686c30a8fc05352a3e20bcb3.exe

  • Size

    414KB

  • MD5

    bf1583e63f772d707c116cc80c76e3d7

  • SHA1

    7442f1317aeb7fdd6da7274e8abe115f20a5958b

  • SHA256

    f48a7dd16b186a612101118825d9149e5bdbdd73686c30a8fc05352a3e20bcb3

  • SHA512

    b0770e6edeebd12e19a6facb14b7537a88ecfbd5f670cf80a6c4a55ff5bb3f9268e9c7f786b2c6aaffecec663a3b457e8aefbfcc24d05fbec0d542e17d4e04e7

Score
10/10

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs
  • Adds policy Run key to start application 2 TTPs 6 IoCs
  • Executes dropped EXE 6 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 4 IoCs
  • Modifies registry key 1 TTPs 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 3 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f48a7dd16b186a612101118825d9149e5bdbdd73686c30a8fc05352a3e20bcb3.exe
    "C:\Users\Admin\AppData\Local\Temp\f48a7dd16b186a612101118825d9149e5bdbdd73686c30a8fc05352a3e20bcb3.exe"
    1⤵
    • Adds Run key to start application
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1000
    • C:\Windows\SysWOW64\REG.exe
      REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
      2⤵
      • Modifies registry key
      PID:3620
    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      C:\Users\Admin\AppData\Local\Temp\avscan.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2608
      • C:\Users\Admin\AppData\Local\Temp\avscan.exe
        C:\Users\Admin\AppData\Local\Temp\avscan.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:1588
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
        3⤵
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:2616
        • C:\windows\hosts.exe
          C:\windows\hosts.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in Windows directory
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2112
          • C:\Users\Admin\AppData\Local\Temp\avscan.exe
            C:\Users\Admin\AppData\Local\Temp\avscan.exe
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetWindowsHookEx
            PID:3920
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
            5⤵
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:2648
            • C:\windows\hosts.exe
              C:\windows\hosts.exe
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetWindowsHookEx
              PID:2384
            • C:\Windows\SysWOW64\WScript.exe
              "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
              6⤵
              • Adds policy Run key to start application
              PID:2020
          • C:\Windows\SysWOW64\REG.exe
            REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
            5⤵
            • Modifies registry key
            PID:3420
          • C:\Windows\SysWOW64\REG.exe
            REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
            5⤵
            • Modifies registry key
            PID:2888
          • C:\Windows\SysWOW64\REG.exe
            REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
            5⤵
            • Modifies registry key
            PID:64
          • C:\Windows\SysWOW64\REG.exe
            REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
            5⤵
            • Modifies registry key
            PID:2644
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
          4⤵
          • Adds policy Run key to start application
          PID:3000
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • Modifies registry key
        PID:3028
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • Modifies registry key
        PID:1348
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • Modifies registry key
        PID:3856
      • C:\Windows\SysWOW64\REG.exe
        REG DELETE HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot /f
        3⤵
        • Modifies registry key
        PID:2292
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c c:\windows\W_X_C.bat
      2⤵
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2700
      • C:\windows\hosts.exe
        C:\windows\hosts.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:2976
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Windows\W_X_C.vbs"
        3⤵
        • Adds policy Run key to start application
        PID:1164
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:1484

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Hidden Files and Directories

    2
    T1158

    Registry Run Keys / Startup Folder

    2
    T1060

    Defense Evasion

    Hidden Files and Directories

    2
    T1158

    Modify Registry

    5
    T1112

    Discovery

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      MD5

      4ae0047bdae14ccdde1a43907726d921

      SHA1

      f8abf3c61e32fcddd678fadf37d47c69a2d2179e

      SHA256

      9b25e63e883bd7d516e4a80c1ff63adf457a634ae03c43cfe97f93592cd37cbe

      SHA512

      437d59224063d7ce683762d1d0e025163b109dc80561f8bb5612df2e69ecfe7f7ee339e254d088eed7ae3f15e896f52ea7f574f5697d7dfaf8f27810dfe7efbc

    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      MD5

      4ae0047bdae14ccdde1a43907726d921

      SHA1

      f8abf3c61e32fcddd678fadf37d47c69a2d2179e

      SHA256

      9b25e63e883bd7d516e4a80c1ff63adf457a634ae03c43cfe97f93592cd37cbe

      SHA512

      437d59224063d7ce683762d1d0e025163b109dc80561f8bb5612df2e69ecfe7f7ee339e254d088eed7ae3f15e896f52ea7f574f5697d7dfaf8f27810dfe7efbc

    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      MD5

      4ae0047bdae14ccdde1a43907726d921

      SHA1

      f8abf3c61e32fcddd678fadf37d47c69a2d2179e

      SHA256

      9b25e63e883bd7d516e4a80c1ff63adf457a634ae03c43cfe97f93592cd37cbe

      SHA512

      437d59224063d7ce683762d1d0e025163b109dc80561f8bb5612df2e69ecfe7f7ee339e254d088eed7ae3f15e896f52ea7f574f5697d7dfaf8f27810dfe7efbc

    • C:\Users\Admin\AppData\Local\Temp\avscan.exe
      MD5

      4ae0047bdae14ccdde1a43907726d921

      SHA1

      f8abf3c61e32fcddd678fadf37d47c69a2d2179e

      SHA256

      9b25e63e883bd7d516e4a80c1ff63adf457a634ae03c43cfe97f93592cd37cbe

      SHA512

      437d59224063d7ce683762d1d0e025163b109dc80561f8bb5612df2e69ecfe7f7ee339e254d088eed7ae3f15e896f52ea7f574f5697d7dfaf8f27810dfe7efbc

    • C:\Windows\W_X_C.vbs
      MD5

      56f244ad0dfcdd0da2b8d260e2393116

      SHA1

      38f6054606babdcf6b802e5d142a4ea4a033cca3

      SHA256

      604dc87b988ded73d2266948fadd4584a8bf8e9f3118bcb96e15b03f27f7179e

      SHA512

      e52a2736aa7405df61aa8d473e3be06734dca45410f66666c687c25248b9789eb398d6e01bb4438a8219fbb771f2b86c009e6193f014d1b38d1b5250dc3b667c

    • C:\Windows\hosts.exe
      MD5

      3856821090be5f490ff1efc886a6a5cb

      SHA1

      8e0e98d850d1d684c66ef7fab3c159f86eeb33b9

      SHA256

      115e9757eae768c96b4c27ab610fa84fd78ad42095b587a778546e8e23fc1d7e

      SHA512

      b0772e2c8c5f06ed3bd70eb703927e9d53d68bd0d6727eb1472301b8fe8602731d91ff9a93e0a1a3632aab8a2c818437ba5d1fa953603dcf1b20072a5041749e

    • C:\Windows\hosts.exe
      MD5

      3856821090be5f490ff1efc886a6a5cb

      SHA1

      8e0e98d850d1d684c66ef7fab3c159f86eeb33b9

      SHA256

      115e9757eae768c96b4c27ab610fa84fd78ad42095b587a778546e8e23fc1d7e

      SHA512

      b0772e2c8c5f06ed3bd70eb703927e9d53d68bd0d6727eb1472301b8fe8602731d91ff9a93e0a1a3632aab8a2c818437ba5d1fa953603dcf1b20072a5041749e

    • C:\Windows\hosts.exe
      MD5

      3856821090be5f490ff1efc886a6a5cb

      SHA1

      8e0e98d850d1d684c66ef7fab3c159f86eeb33b9

      SHA256

      115e9757eae768c96b4c27ab610fa84fd78ad42095b587a778546e8e23fc1d7e

      SHA512

      b0772e2c8c5f06ed3bd70eb703927e9d53d68bd0d6727eb1472301b8fe8602731d91ff9a93e0a1a3632aab8a2c818437ba5d1fa953603dcf1b20072a5041749e

    • C:\Windows\hosts.exe
      MD5

      3856821090be5f490ff1efc886a6a5cb

      SHA1

      8e0e98d850d1d684c66ef7fab3c159f86eeb33b9

      SHA256

      115e9757eae768c96b4c27ab610fa84fd78ad42095b587a778546e8e23fc1d7e

      SHA512

      b0772e2c8c5f06ed3bd70eb703927e9d53d68bd0d6727eb1472301b8fe8602731d91ff9a93e0a1a3632aab8a2c818437ba5d1fa953603dcf1b20072a5041749e

    • C:\windows\hosts.exe
      MD5

      3856821090be5f490ff1efc886a6a5cb

      SHA1

      8e0e98d850d1d684c66ef7fab3c159f86eeb33b9

      SHA256

      115e9757eae768c96b4c27ab610fa84fd78ad42095b587a778546e8e23fc1d7e

      SHA512

      b0772e2c8c5f06ed3bd70eb703927e9d53d68bd0d6727eb1472301b8fe8602731d91ff9a93e0a1a3632aab8a2c818437ba5d1fa953603dcf1b20072a5041749e

    • \??\c:\windows\W_X_C.bat
      MD5

      4db9f8b6175722b62ececeeeba1ce307

      SHA1

      3b3ba8414706e72a6fa19e884a97b87609e11e47

      SHA256

      d2150b9e5a4ce55e140f0ca91c4e300715d42095c8fddf58c77037cdd2cfaf78

      SHA512

      1d6dc274cf7a3dd704f840e6a5ad57ab4c4e35d5f09489aeff520bb797e1c825bac53fc335156fe41e767a46520d031855fe42fe7b175409ebe5e9e986fb9b8b

    • memory/64-185-0x0000000000000000-mapping.dmp
    • memory/1000-114-0x0000000000030000-0x0000000000034000-memory.dmp
      Filesize

      16KB

    • memory/1000-115-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/1000-116-0x0000000000400000-0x0000000000425000-memory.dmp
      Filesize

      148KB

    • memory/1000-119-0x0000000000401000-0x000000000041D000-memory.dmp
      Filesize

      112KB

    • memory/1164-176-0x0000000000000000-mapping.dmp
    • memory/1348-182-0x0000000000000000-mapping.dmp
    • memory/1588-129-0x0000000000000000-mapping.dmp
    • memory/1588-131-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/2020-177-0x0000000000000000-mapping.dmp
    • memory/2112-147-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/2112-143-0x0000000000000000-mapping.dmp
    • memory/2292-186-0x0000000000000000-mapping.dmp
    • memory/2384-171-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/2384-168-0x0000000000000000-mapping.dmp
    • memory/2608-121-0x0000000000000000-mapping.dmp
    • memory/2608-124-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/2616-139-0x0000000000000000-mapping.dmp
    • memory/2644-187-0x0000000000000000-mapping.dmp
    • memory/2648-167-0x0000000000000000-mapping.dmp
    • memory/2700-140-0x0000000000000000-mapping.dmp
    • memory/2888-183-0x0000000000000000-mapping.dmp
    • memory/2976-148-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/2976-142-0x0000000000000000-mapping.dmp
    • memory/3000-175-0x0000000000000000-mapping.dmp
    • memory/3028-180-0x0000000000000000-mapping.dmp
    • memory/3420-181-0x0000000000000000-mapping.dmp
    • memory/3620-120-0x0000000000000000-mapping.dmp
    • memory/3856-184-0x0000000000000000-mapping.dmp
    • memory/3920-157-0x0000000066000000-0x0000000066153000-memory.dmp
      Filesize

      1.3MB

    • memory/3920-155-0x0000000000000000-mapping.dmp