Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-12-2024 02:01

General

  • Target

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe

  • Size

    3.7MB

  • MD5

    15f259b30ec72a5217144834f7f5b564

  • SHA1

    baed3fe7d059a497f856e263431ccd3872ef1ea1

  • SHA256

    01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

  • SHA512

    5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

  • SSDEEP

    98304:ZrAsTIZbqqBQjwske/pCT66UNYekeWY0CE9:ZcCSL0ke/pO5ekeWtCE9

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DAVID

C2

hoffmann3.ydns.eu:5829

Mutex

532aca2b-96ff-44aa-9213-031e975919ac

Attributes
  • encryption_key

    C5B555A83D127A9553D4FB1FCECB35CE8E91A447

  • install_name

    outlooks.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Outlooks

  • subdirectory

    WindowsUpdates

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 5 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 12 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 58 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe
    "C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1672
    • 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\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2848
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2668
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8AF1.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2832
    • C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe
      "C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
      2⤵
        PID:2516
      • C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe
        "C:\Users\Admin\AppData\Local\Temp\01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2.exe"
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2536
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
          3⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:708
        • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
          "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1400
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1912
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\eNuXmIwkixzW.exe"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1780
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\eNuXmIwkixzW" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD01B.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2760
          • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
            "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
            4⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2284
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
              5⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1748

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp8AF1.tmp

      Filesize

      1KB

      MD5

      940b72f92a4f8abcc42d6fe6528687da

      SHA1

      f736020f92909b2d922be96f33383c4a21be3a14

      SHA256

      619c195cb8e11ee396c09da7edea15d27545fe2f6f7e46b2b4778e3576141afc

      SHA512

      5775948182e70f3e8775df57badc6b6334271a464403aa95588cc9e8237850205cdecdd0de03595c3717e719548494cf17cb085b3d6163d8fbd5f3e2385fec4d

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\ZV5NP1GNXOZMK9A9HH8A.temp

      Filesize

      7KB

      MD5

      b76607c62d341cb477518e4b9ae815dc

      SHA1

      e506fb683c45966317d7f93b1a38eb7317485f4c

      SHA256

      a040beb7739822091abbe479c3efcb71245464964a8d0488648056be77e7754e

      SHA512

      a8b391fad9cf797915f7473e15c8de27026b4705d1960955f7f58344be044b9932505970b0e935cf5e81cf376c6be78a52ad9c6dbef53754430f13b3797c816e

    • \??\PIPE\srvsvc

      MD5

      d41d8cd98f00b204e9800998ecf8427e

      SHA1

      da39a3ee5e6b4b0d3255bfef95601890afd80709

      SHA256

      e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

      SHA512

      cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

    • \Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

      Filesize

      3.7MB

      MD5

      15f259b30ec72a5217144834f7f5b564

      SHA1

      baed3fe7d059a497f856e263431ccd3872ef1ea1

      SHA256

      01de053d9560d419f0b6c35dbddb1175eb1fd7a21450989332024b812d39c4c2

      SHA512

      5e1148a9cf8008b7c38d067ec34e5c3bc7255341d114476532f8111ea2c3e654eb70b0a439aaaea22543576f09b9cec269f9b3414a6a24fc54b89c7c677c5f47

    • memory/1400-39-0x0000000000D20000-0x00000000010CC000-memory.dmp

      Filesize

      3.7MB

    • memory/1672-6-0x0000000007AE0000-0x0000000007E48000-memory.dmp

      Filesize

      3.4MB

    • memory/1672-31-0x0000000074E90000-0x000000007557E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-5-0x0000000074E90000-0x000000007557E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-4-0x0000000074E9E000-0x0000000074E9F000-memory.dmp

      Filesize

      4KB

    • memory/1672-0-0x0000000074E9E000-0x0000000074E9F000-memory.dmp

      Filesize

      4KB

    • memory/1672-3-0x0000000000950000-0x0000000000968000-memory.dmp

      Filesize

      96KB

    • memory/1672-2-0x0000000074E90000-0x000000007557E000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-1-0x0000000001320000-0x00000000016CC000-memory.dmp

      Filesize

      3.7MB

    • memory/2284-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2536-21-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-30-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-29-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-25-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-28-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2536-24-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB

    • memory/2536-19-0x0000000000400000-0x0000000000724000-memory.dmp

      Filesize

      3.1MB