Analysis

  • max time kernel
    144s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-03-2023 13:24

General

  • Target

    7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe

  • Size

    2.9MB

  • MD5

    68a23c2fc62bddad0a2c6cf36003577b

  • SHA1

    67a19bf734520933adfa28afc017c3af1d6a3d5b

  • SHA256

    7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

  • SHA512

    0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

  • SSDEEP

    24576:plubLwtFDS7FYNYD7264xnRhc/LSXxH227hqRCeFcOziFJLUfdKTgWA22222222:gZ7h4xnRhcGXxHxOqdq1pup

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

SUCCESS

C2

41.185.97.216:4782

Mutex

MUTEX_QAxMFzrXWG2cbIHPGK

Attributes
  • encryption_key

    4DwUV8AnxPgmXSMeThKb

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    cmd

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe
    "C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1720
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1512
    • C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe
      C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe
      2⤵
        PID:1300
      • C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe
        C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe
        2⤵
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1304
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "cmd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:768
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1388
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:956
          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            4⤵
            • Executes dropped EXE
            PID:1808
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "cmd" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Creates scheduled task(s)
              PID:1000

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\CEIDOE2WA88KBN99ADQR.temp

      Filesize

      7KB

      MD5

      dfcb897e35ca35109f3529b3ac8bbaef

      SHA1

      fc378e47b182ca841ebfa3fe61be2557113a4dbb

      SHA256

      4e324c14635969252466459efd4a3035fb7dd0566117126a08fe8d10acd5e80f

      SHA512

      59e9d85165b1d3aa771dcf692c4ef046afa0cfec186409d10205e3cf82e018b4c0b0c5f13837fa086c88dc5ccd040e7858ef21dd5da2d032c19d0e4bc8838ee0

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

      Filesize

      7KB

      MD5

      dfcb897e35ca35109f3529b3ac8bbaef

      SHA1

      fc378e47b182ca841ebfa3fe61be2557113a4dbb

      SHA256

      4e324c14635969252466459efd4a3035fb7dd0566117126a08fe8d10acd5e80f

      SHA512

      59e9d85165b1d3aa771dcf692c4ef046afa0cfec186409d10205e3cf82e018b4c0b0c5f13837fa086c88dc5ccd040e7858ef21dd5da2d032c19d0e4bc8838ee0

    • C:\Users\Admin\AppData\Roaming\Saizfrsak\Omjvs.exe

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

    • C:\Users\Admin\AppData\Roaming\Saizfrsak\Omjvs.exe

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

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

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

    • \Users\Admin\AppData\Roaming\SubDir\Client.exe

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

    • \Users\Admin\AppData\Roaming\SubDir\Client.exe

      Filesize

      2.9MB

      MD5

      68a23c2fc62bddad0a2c6cf36003577b

      SHA1

      67a19bf734520933adfa28afc017c3af1d6a3d5b

      SHA256

      7a6db8aecc2376ec7dfc50085757841523fb69135e364b70c7319bf7a39209d7

      SHA512

      0386671ee83c0825f80a0c95b4e21eb23054878546aff5d8ef63a3bcc6a32c53a61397009aee8e8c5fc171b1ed0e9b69a31111eb1b860e1ff67264fcac806cef

    • memory/956-89-0x0000000001FF0000-0x0000000002030000-memory.dmp

      Filesize

      256KB

    • memory/956-87-0x0000000001FF0000-0x0000000002030000-memory.dmp

      Filesize

      256KB

    • memory/956-92-0x0000000001FF0000-0x0000000002030000-memory.dmp

      Filesize

      256KB

    • memory/956-91-0x0000000001FF0000-0x0000000002030000-memory.dmp

      Filesize

      256KB

    • memory/956-88-0x0000000001FF0000-0x0000000002030000-memory.dmp

      Filesize

      256KB

    • memory/1304-64-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-68-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-66-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-65-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1304-70-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-63-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-72-0x0000000000400000-0x000000000045E000-memory.dmp

      Filesize

      376KB

    • memory/1304-73-0x0000000004DE0000-0x0000000004E20000-memory.dmp

      Filesize

      256KB

    • memory/1388-90-0x0000000004A10000-0x0000000004A50000-memory.dmp

      Filesize

      256KB

    • memory/1388-81-0x0000000004A10000-0x0000000004A50000-memory.dmp

      Filesize

      256KB

    • memory/1388-80-0x0000000000F00000-0x00000000011EA000-memory.dmp

      Filesize

      2.9MB

    • memory/1512-60-0x0000000002750000-0x0000000002790000-memory.dmp

      Filesize

      256KB

    • memory/1720-61-0x0000000004D70000-0x0000000004DB0000-memory.dmp

      Filesize

      256KB

    • memory/1720-54-0x00000000008B0000-0x0000000000B9A000-memory.dmp

      Filesize

      2.9MB

    • memory/1720-57-0x0000000004D70000-0x0000000004DB0000-memory.dmp

      Filesize

      256KB

    • memory/1720-56-0x0000000004AA0000-0x0000000004B32000-memory.dmp

      Filesize

      584KB

    • memory/1720-55-0x0000000004FE0000-0x0000000005140000-memory.dmp

      Filesize

      1.4MB

    • memory/1808-100-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1808-105-0x0000000072D30000-0x000000007341E000-memory.dmp

      Filesize

      6.9MB