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Overview

overview

10

Static

static

8

3b737fe6f8...b8.exe

windows7-x64

10

3b737fe6f8...b8.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    19/10/2022, 14:26

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General

  • Target

    3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe

  • Size

    248KB

  • MD5

    a123251af864122aa944e99d145b0051

  • SHA1

    ef8aef577bb37e2badd7d2705eebf9c83b156b42

  • SHA256

    3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8

  • SHA512

    ee62b85b66dc71811148d10d57b4b7d58df07d3cd63a50e2aad8c7d2d092d1ab300f5d48f7c63b1a31c6d98c9ec38b8a9e3c4cc07a8e2d2e2a6e84a95ebfccf9

  • SSDEEP

    6144:huMJWY+qaHEQCcYfSBYJbQCjRcqESEgm6Anhc1kG6EmRzxs:h+YcUc6SBLLTSEgBAnhc1kGsxs

Score
10/10
evasionpersistenceupx

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Disables RegEdit via registry modification 1 IoCs
    evasion
  • Disables Task Manager via registry modification
    evasion
  • Modifies Installed Components in the registry 2 TTPs 7 IoCs
    persistence
  • UPX packed file 2 IoCs

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

    upx
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 24 IoCs

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

  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 5 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 35 IoCs
  • Suspicious behavior: EnumeratesProcesses 34 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe
    "C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1064
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /C AT /delete /yes
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:968
      • C:\Windows\SysWOW64\at.exe
        AT /delete /yes
        3⤵
          PID:1176
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\WORD.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1636
        • C:\Windows\SysWOW64\at.exe
          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\WORD.exe
          3⤵
            PID:268
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2032
      • C:\Windows\system32\AUDIODG.EXE
        C:\Windows\system32\AUDIODG.EXE 0x588
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1548
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:432
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:936
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SendNotifyMessage
        PID:1816
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        PID:1048
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        PID:300
      • C:\Windows\explorer.exe
        explorer.exe
        1⤵
        • Modifies Installed Components in the registry
        • Modifies registry class
        PID:1868

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • memory/432-64-0x000007FEFBE81000-0x000007FEFBE83000-memory.dmp

        Filesize

        8KB

        Download

      • memory/936-65-0x000007FEFBD81000-0x000007FEFBD83000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1064-54-0x0000000075BB1000-0x0000000075BB3000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1064-61-0x0000000000400000-0x000000000049AF8B-memory.dmp

        Filesize

        619KB

        Download

      • memory/1064-63-0x0000000000400000-0x000000000049AF8B-memory.dmp

        Filesize

        619KB

        Download

      • memory/1816-66-0x000007FEFB861000-0x000007FEFB863000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1868-69-0x000007FEF9391000-0x000007FEF9393000-memory.dmp

        Filesize

        8KB

        Download

      • memory/2032-62-0x000007FEFC0A1000-0x000007FEFC0A3000-memory.dmp

        Filesize

        8KB

        Download