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Analysis

  • max time kernel
    120s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19/01/2025, 15:26

General

  • Target

    1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6N.exe

  • Size

    349KB

  • MD5

    dabfb0447a6890da9fe713ac91062340

  • SHA1

    fd57dd243e2a0ef131433eb433c9f007bed44a90

  • SHA256

    1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6

  • SHA512

    87d156130e4aecb2fc163ebc2784674c11fc0941e794655031b0c4261d2f602665863972989ac55485c097cf475c5f4801ef618cf0fe5cab284411fd708d1066

  • SSDEEP

    6144:UsLqdufVUNDaq5/uqlCWuXecmE4b3eJRB/W:PFUNDa0uqlCWXcmEAeJRBW

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

New World

C2

x75tjpwatl2uyunijiq6jwqhlar3j5fkpi5optv7tfreijbpylwnnbqd.onion:8880

Mutex

QSR_MUTEX_d2kuBEHahLdNktTZE5

Attributes
  • encryption_key

    gAMhb8JSxFP4DNFkynoe

  • install_name

    Java.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Java

  • subdirectory

    Java

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 11 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 5 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6N.exe
    "C:\Users\Admin\AppData\Local\Temp\1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6N.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2412
    • \??\c:\users\admin\appdata\local\temp\1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6n.exe 
      c:\users\admin\appdata\local\temp\1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6n.exe 
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2716
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 1084
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2972
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2700
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2872
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2748
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Loads dropped DLL
            • Adds Run key to start application
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2596
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:2112
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 15:28 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1772
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 15:29 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:3032
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:2772

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\Resources\Themes\explorer.exe

      Filesize

      135KB

      MD5

      657a4193aea8f71ab6845ad1e99f95f1

      SHA1

      b5c2b49e04edb0a0dc9b88d432365d0c057fbd41

      SHA256

      eb5abdfb067dcc6cfcd2448347d40c6203065d32fcf2978ca2bcee2dc290b9ad

      SHA512

      7a72d728cb8fcd2614436b72d0416a0144f764c47dcbcfd19dc5af10ea5bb88e2e4d9219e46fefbca07dcc3952832c9ed7cd47edfa67384e159ba2bc134c3e56

    • \Users\Admin\AppData\Local\Temp\1f40225b21f035d11c1d21b13e51fcc1be6be091825cf876977fe63ee51ff5e6n.exe 

      Filesize

      214KB

      MD5

      862d9a823ae99b9181b749ae66198bca

      SHA1

      b89eaa81779e4c7f6109cd67ad69fc8a99ce7f16

      SHA256

      af74be686e4636701f86e56d1129cdacdda93b863bb45ab491237d093b8101bf

      SHA512

      d80bd737a4af4d07b104551bf1c91cedc91cfb463b8af2ae78b0aac6e75862a4dd31cd2de37daa0e4d5857e785987f43e994f0623286adfbe61e656274207507

    • \Windows\Resources\Themes\icsys.icn.exe

      Filesize

      135KB

      MD5

      d8dc406bf8d197c04dcff330056f8973

      SHA1

      f8cc9cd479fd010721862839c7ea52914f1fbf93

      SHA256

      9ef8896115ec433657a4943b7f839d9828d27af7c7772ec60f2f764b6974a0c8

      SHA512

      ca039a49da2b7c173f9eebde5dbb64ba340557eea5c50a2b8c5338d8251c999d4d965244be450e4a7898792539d9bb65c8cb37ae75cdf287c0fbc822804fc9cd

    • \Windows\Resources\spoolsv.exe

      Filesize

      135KB

      MD5

      defe9ad9a44e723296072a005c0cd785

      SHA1

      6b2d16ac5e35ac16e2822f85e49555ec8d8f2b2b

      SHA256

      4a7f921363132127615eaafdc602e94f30e15bc20e3bc7a1c21b9bafa1acb4df

      SHA512

      85bee358ddee89eb930c994e41f4f70abd8e7f3dcfadd5f8e78545fa50af15f9f12d5f8926cbb2fcf4cda09ec2ce3b3fc4074e664f64f0591e09da6fa0ab0fa2

    • \Windows\Resources\svchost.exe

      Filesize

      135KB

      MD5

      ff2840898642b65dc493b7bb5a23cfa9

      SHA1

      5a014664d9cd349171d857a846c8c601af884583

      SHA256

      a91fe8293b56afcc5b251ee93db947651248ce185a4700073aebba69da3e52f4

      SHA512

      c2b31533931a18a636d95211a2105119287ddf18e66d0ae864a787afb3e6c5d675dd625bdcd3e36a83c3cbc29d2e4a5d3be0940fded19d37ba2cfb22b9616615

    • memory/2112-62-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2412-18-0x0000000000300000-0x000000000031F000-memory.dmp

      Filesize

      124KB

    • memory/2412-0-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2412-64-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2596-74-0x0000000000280000-0x000000000029F000-memory.dmp

      Filesize

      124KB

    • memory/2596-73-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2700-29-0x00000000002E0000-0x00000000002FF000-memory.dmp

      Filesize

      124KB

    • memory/2700-65-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2716-11-0x000000007428E000-0x000000007428F000-memory.dmp

      Filesize

      4KB

    • memory/2716-61-0x0000000074280000-0x000000007496E000-memory.dmp

      Filesize

      6.9MB

    • memory/2716-56-0x000000007428E000-0x000000007428F000-memory.dmp

      Filesize

      4KB

    • memory/2716-71-0x0000000074280000-0x000000007496E000-memory.dmp

      Filesize

      6.9MB

    • memory/2716-13-0x0000000074280000-0x000000007496E000-memory.dmp

      Filesize

      6.9MB

    • memory/2716-12-0x00000000003B0000-0x00000000003EC000-memory.dmp

      Filesize

      240KB

    • memory/2748-63-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2748-49-0x00000000003E0000-0x00000000003FF000-memory.dmp

      Filesize

      124KB

    • memory/2872-72-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB