Resubmissions

19/01/2022, 16:34

220119-t3a7tsbfa4 10

25/11/2021, 12:33

211125-pq7ytaaed7 8

Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    19/01/2022, 16:34

General

  • Target

    df7f07f9b0c6ff27b0011f3a6daa5ca4b73f554b6a1ed319dce05919c3c4e18c.exe

  • Size

    6.2MB

  • MD5

    2d1155dba49fbdfa8d645b1f94ff9291

  • SHA1

    a8691fe37b1e2c7fe6c0c984cdfb74be79ce0d4e

  • SHA256

    df7f07f9b0c6ff27b0011f3a6daa5ca4b73f554b6a1ed319dce05919c3c4e18c

  • SHA512

    fdcc07d89e2dcbb6d5a770ab61f97a47d00777a8e8494936320d706b136d0c997b4d4fe88db8eed886f7fa5bb6cf255c7f42516cf9641109054d2ed3f01cae23

Malware Config

Extracted

Family

cryptbot

C2

cemyef23.top

morumo02.top

Attributes
  • payload_url

    http://bojshi03.top/download.php?file=lv.exe

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 11 IoCs
  • Enumerates connected drives 3 TTPs 64 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Windows directory 11 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\df7f07f9b0c6ff27b0011f3a6daa5ca4b73f554b6a1ed319dce05919c3c4e18c.exe
    "C:\Users\Admin\AppData\Local\Temp\df7f07f9b0c6ff27b0011f3a6daa5ca4b73f554b6a1ed319dce05919c3c4e18c.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1896
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\system32\msiexec.exe" /i "C:\Users\Admin\AppData\Roaming\PC SOFT\PST Perfomance Software 1.3.0.0\install\08B14CD\adv2.msi" AI_SETUPEXEPATH=C:\Users\Admin\AppData\Local\Temp\df7f07f9b0c6ff27b0011f3a6daa5ca4b73f554b6a1ed319dce05919c3c4e18c.exe SETUPEXEDIR=C:\Users\Admin\AppData\Local\Temp\ EXE_CMD_LINE="/exenoupdates /forcecleanup /wintime 1642350708 " AI_EUIMSI=""
      2⤵
      • Blocklisted process makes network request
      • Enumerates connected drives
      • Suspicious use of FindShellTrayWindow
      PID:1648
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1676
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 2EF1C291F8D076292722549F385C59D0 C
      2⤵
      • Loads dropped DLL
      PID:1840
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding A58EE943C1F5B2A363CFD95F03787415
      2⤵
      • Loads dropped DLL
      PID:1720
    • C:\Users\Admin\AppData\Roaming\PC SOFT\PST Perfomance Software\spacecore.exe
      "C:\Users\Admin\AppData\Roaming\PC SOFT\PST Perfomance Software\spacecore.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious use of WriteProcessMemory
      PID:1640
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\IlQiEvXJt & timeout 4 & del /f /q "C:\Users\Admin\AppData\Roaming\PC SOFT\PST Perfomance Software\spacecore.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1968
        • C:\Windows\SysWOW64\timeout.exe
          timeout 4
          4⤵
          • Delays execution with timeout.exe
          PID:1940

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1640-124-0x0000000000D40000-0x000000000125F000-memory.dmp

          Filesize

          5.1MB

        • memory/1676-57-0x000007FEFC321000-0x000007FEFC323000-memory.dmp

          Filesize

          8KB

        • memory/1896-54-0x0000000076C61000-0x0000000076C63000-memory.dmp

          Filesize

          8KB