Analysis

  • max time kernel
    75s
  • max time network
    137s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    21/06/2020, 18:49

General

  • Target

    wtava.bin.exe

  • Size

    1.1MB

  • MD5

    6c660f960daac148be75427c712d0134

  • SHA1

    b3c597060abc20d3b3291f8b5252a3834d49b92f

  • SHA256

    fa4626e2c5984d7868a685c5102530bd8260d0b31ef06d2ce2da7636da48d2d6

  • SHA512

    48806df9787497cbf55a85a523c8e703aec1bb262c60a019ab45f420a87d016054a97dc428484bd5c2f7ba1c3f57a37d807fc4e1de487dbef1c76dc38fbf8fe0

Malware Config

Signatures

  • Suspicious behavior: EnumeratesProcesses 658 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • Enumerates connected drives 3 TTPs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Adds Run entry to start application 2 TTPs 4 IoCs
  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious use of AdjustPrivilegeToken 66 IoCs
  • Modifies service 2 TTPs 4 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • System policy modification 1 TTPs 1 IoCs
  • UAC bypass 3 TTPs 2 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

Processes

  • C:\Users\Admin\AppData\Local\Temp\wtava.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\wtava.bin.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • Checks whether UAC is enabled
    • Adds Run entry to start application
    • Drops desktop.ini file(s)
    • System policy modification
    • UAC bypass
    PID:3060
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3496
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:3940
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:412
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:836
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1052
    • C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:1292
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Modifies service
    PID:3004

Network

MITRE ATT&CK Enterprise v6

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