Analysis

  • max time kernel
    158s
  • max time network
    166s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    18-10-2021 17:32

General

  • Target

    0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe

  • Size

    861KB

  • MD5

    1b465c6989637df1d5c511919c43e457

  • SHA1

    317f8bf5133176cd0f4125c6f2f0fdfc226754ab

  • SHA256

    0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095

  • SHA512

    e9dfd465ee22ebf67a73fdd873440d73f013b064e2a4aff3aedad2c5bd1b3027284af7912a383ad6c0a91ef8caad2b3c69cdfd29edb638563d89fd7e89e114dc

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

grace.adds-only.xyz:1609

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    wHq4o3k6UfKZv19jkcxs

  • install_name

    winrara.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 5 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • Quasar Payload 5 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • VenomRAT

    VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

  • Executes dropped EXE 2 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe
    "C:\Users\Admin\AppData\Local\Temp\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1524
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1908
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kCCzCqEnSxl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1EAB.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:612
    • C:\Users\Admin\AppData\Local\Temp\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe
      "C:\Users\Admin\AppData\Local\Temp\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe"
      2⤵
      • Windows security modification
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:708
      • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1760
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1964
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kCCzCqEnSxl" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF69C.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1524
        • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4052
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1596
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2636
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
          4⤵
            PID:3112

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095.exe.log

      MD5

      0c2899d7c6746f42d5bbe088c777f94c

      SHA1

      622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

      SHA256

      5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

      SHA512

      ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      MD5

      e745b8b7681f5ae25b09a7b1eb2f8fd3

      SHA1

      cd55c3fcf95d11f5d4fb4a75233dc69494f74d80

      SHA256

      5a7e3072d483e8dc341b902b937b53a379dc4080f08b54410c3c2046dd500538

      SHA512

      65ff6cfa6b416c099612e9f00399514d52264a4a58f8c63e2f78111805bf623eecded3d18c36dc1be5431aef50a1c192eaed6122e10d722e94325e6412d4298e

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      MD5

      8145e1a26211cc72bc012268ba8b3c42

      SHA1

      a38a0a58072dd1045a4bf3f302f206082a61871e

      SHA256

      b340bf39f3d18b1eb40384a77561cb2d42a3e548b37e705e72b39ba75116ec1a

      SHA512

      84c0454651cc15da66dd025e6b8373a6aa814e66fa380fda50f8ffd1e2b89869c2bc9c519e35dbae6b172467bbc4e92fcb23edcc6c816eb9cd06fffb2e62bf35

    • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe

      MD5

      1b465c6989637df1d5c511919c43e457

      SHA1

      317f8bf5133176cd0f4125c6f2f0fdfc226754ab

      SHA256

      0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095

      SHA512

      e9dfd465ee22ebf67a73fdd873440d73f013b064e2a4aff3aedad2c5bd1b3027284af7912a383ad6c0a91ef8caad2b3c69cdfd29edb638563d89fd7e89e114dc

    • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe

      MD5

      1b465c6989637df1d5c511919c43e457

      SHA1

      317f8bf5133176cd0f4125c6f2f0fdfc226754ab

      SHA256

      0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095

      SHA512

      e9dfd465ee22ebf67a73fdd873440d73f013b064e2a4aff3aedad2c5bd1b3027284af7912a383ad6c0a91ef8caad2b3c69cdfd29edb638563d89fd7e89e114dc

    • C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe

      MD5

      1b465c6989637df1d5c511919c43e457

      SHA1

      317f8bf5133176cd0f4125c6f2f0fdfc226754ab

      SHA256

      0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095

      SHA512

      e9dfd465ee22ebf67a73fdd873440d73f013b064e2a4aff3aedad2c5bd1b3027284af7912a383ad6c0a91ef8caad2b3c69cdfd29edb638563d89fd7e89e114dc

    • memory/612-128-0x0000000000000000-mapping.dmp

    • memory/708-139-0x0000000004E10000-0x000000000530E000-memory.dmp

      Filesize

      5.0MB

    • memory/708-131-0x0000000000400000-0x000000000048C000-memory.dmp

      Filesize

      560KB

    • memory/708-132-0x0000000000486C1E-mapping.dmp

    • memory/708-145-0x0000000005B90000-0x0000000005B91000-memory.dmp

      Filesize

      4KB

    • memory/708-140-0x0000000005090000-0x0000000005091000-memory.dmp

      Filesize

      4KB

    • memory/708-147-0x00000000060C0000-0x00000000060C1000-memory.dmp

      Filesize

      4KB

    • memory/1524-121-0x0000000009F30000-0x0000000009F31000-memory.dmp

      Filesize

      4KB

    • memory/1524-650-0x0000000000000000-mapping.dmp

    • memory/1524-123-0x00000000014F0000-0x0000000001598000-memory.dmp

      Filesize

      672KB

    • memory/1524-122-0x0000000009E90000-0x0000000009E98000-memory.dmp

      Filesize

      32KB

    • memory/1524-120-0x0000000007BF0000-0x0000000007BF1000-memory.dmp

      Filesize

      4KB

    • memory/1524-115-0x0000000000B60000-0x0000000000B61000-memory.dmp

      Filesize

      4KB

    • memory/1524-119-0x00000000079D0000-0x0000000007ECE000-memory.dmp

      Filesize

      5.0MB

    • memory/1524-118-0x0000000007A80000-0x0000000007A81000-memory.dmp

      Filesize

      4KB

    • memory/1524-117-0x0000000007ED0000-0x0000000007ED1000-memory.dmp

      Filesize

      4KB

    • memory/1596-198-0x000000007EE00000-0x000000007EE01000-memory.dmp

      Filesize

      4KB

    • memory/1596-157-0x0000000003340000-0x0000000003341000-memory.dmp

      Filesize

      4KB

    • memory/1596-165-0x0000000004D10000-0x0000000004D11000-memory.dmp

      Filesize

      4KB

    • memory/1596-156-0x0000000003340000-0x0000000003341000-memory.dmp

      Filesize

      4KB

    • memory/1596-168-0x0000000004D12000-0x0000000004D13000-memory.dmp

      Filesize

      4KB

    • memory/1596-152-0x0000000000000000-mapping.dmp

    • memory/1596-175-0x0000000003340000-0x0000000003341000-memory.dmp

      Filesize

      4KB

    • memory/1596-217-0x0000000004D13000-0x0000000004D14000-memory.dmp

      Filesize

      4KB

    • memory/1760-149-0x0000000000000000-mapping.dmp

    • memory/1760-166-0x0000000007050000-0x000000000754E000-memory.dmp

      Filesize

      5.0MB

    • memory/1908-130-0x0000000004F32000-0x0000000004F33000-memory.dmp

      Filesize

      4KB

    • memory/1908-162-0x0000000008910000-0x0000000008911000-memory.dmp

      Filesize

      4KB

    • memory/1908-127-0x0000000004D90000-0x0000000004D91000-memory.dmp

      Filesize

      4KB

    • memory/1908-218-0x0000000004F33000-0x0000000004F34000-memory.dmp

      Filesize

      4KB

    • memory/1908-146-0x0000000007930000-0x0000000007931000-memory.dmp

      Filesize

      4KB

    • memory/1908-141-0x0000000007890000-0x0000000007891000-memory.dmp

      Filesize

      4KB

    • memory/1908-138-0x0000000007980000-0x0000000007981000-memory.dmp

      Filesize

      4KB

    • memory/1908-176-0x00000000034A0000-0x00000000034A1000-memory.dmp

      Filesize

      4KB

    • memory/1908-189-0x0000000009660000-0x0000000009693000-memory.dmp

      Filesize

      204KB

    • memory/1908-129-0x0000000004F30000-0x0000000004F31000-memory.dmp

      Filesize

      4KB

    • memory/1908-202-0x000000007F6F0000-0x000000007F6F1000-memory.dmp

      Filesize

      4KB

    • memory/1908-148-0x0000000008BE0000-0x0000000008BE1000-memory.dmp

      Filesize

      4KB

    • memory/1908-124-0x0000000000000000-mapping.dmp

    • memory/1908-144-0x0000000008270000-0x0000000008271000-memory.dmp

      Filesize

      4KB

    • memory/1908-142-0x0000000008190000-0x0000000008191000-memory.dmp

      Filesize

      4KB

    • memory/1908-125-0x00000000034A0000-0x00000000034A1000-memory.dmp

      Filesize

      4KB

    • memory/1908-126-0x00000000034A0000-0x00000000034A1000-memory.dmp

      Filesize

      4KB

    • memory/1964-649-0x0000000000000000-mapping.dmp

    • memory/1964-662-0x0000000006840000-0x0000000006841000-memory.dmp

      Filesize

      4KB

    • memory/1964-664-0x0000000006842000-0x0000000006843000-memory.dmp

      Filesize

      4KB

    • memory/1964-767-0x0000000006843000-0x0000000006844000-memory.dmp

      Filesize

      4KB

    • memory/1964-689-0x000000007EDC0000-0x000000007EDC1000-memory.dmp

      Filesize

      4KB

    • memory/2636-646-0x0000000000000000-mapping.dmp

    • memory/3112-647-0x0000000000000000-mapping.dmp

    • memory/4052-652-0x0000000000486C1E-mapping.dmp

    • memory/4052-663-0x00000000050C0000-0x00000000050C1000-memory.dmp

      Filesize

      4KB