Analysis

  • max time kernel
    149s
  • max time network
    61s
  • platform
    windows11-21h2_x64
  • resource
    win11-20250610-en
  • resource tags

    arch:x64arch:x86image:win11-20250610-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    13/10/2025, 16:00

General

  • Target
    SETUP_1.exe
  • Size 9.0MB
  • Sample251013-tfleaagj4s
  • SHA256 4052df4d6e7b8c82a36231ac7eaac8e6072c8da7ca989e831c226e17ae9a4517
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.3.0.0

Botnet
  • setup

C2
  • azharabdo109.ddns.net:61293

Mutex
  • QSR_MUTEX_eyJ2qGfzmq4bwaIxyh

Attributes
  • encryption_key

    dbLHm7Cgu3oZDoyPUWrl

  • install_name

    setup.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    setup

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 5 IoCs
  • Loads dropped DLL 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 5 IoCs
  • Program crash 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 26 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 4 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SETUP_1.exe
    "C:\Users\Admin\AppData\Local\Temp\SETUP_1.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3516
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:72
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:6136
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1AwPl1jiSECI.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4920
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4556
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:3140
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1388
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 72 -s 1724
        3⤵
        • Program crash
        PID:4976
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5640
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4468
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:704
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YhInc4tRaiJH.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2336
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3808
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:3152
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1392
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4468 -s 2256
        3⤵
        • Program crash
        PID:2344
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2512
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2352
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\chgoS9E8HYHU.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2208
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1592
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:484
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2588
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2512 -s 2244
        3⤵
        • Program crash
        PID:2664
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:5736
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4516
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AONbrM8Jq0Vu.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        PID:108
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4944
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:5876
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          PID:6004
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 5736 -s 2264
        3⤵
        • Program crash
        PID:5792
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 72 -ip 72
    1⤵
      PID:2480
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
      1⤵
      • System Location Discovery: System Language Discovery
      PID:728
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4468 -ip 4468
      1⤵
        PID:2084
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2512 -ip 2512
        1⤵
          PID:2884
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 5736 -ip 5736
          1⤵
            PID:1960

          Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                AddInProcess32.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\AddInProcess32.exe.log
                • Size 411B
                • SHA256 4316a207e4de7425aa5d54fb2aba0f01b9d3fa3a4810c300da132be830bc63ad
                • MD5 SHA1 SHA512

                1AwPl1jiSECI.bat

                • Path C:\Users\Admin\AppData\Local\Temp\1AwPl1jiSECI.bat
                • Size 223B
                • SHA256 835b8b269c88c9739a43d0154ed89ddefe8dc1571c1a1614539e176a639112ee
                • MD5 SHA1 SHA512

                AONbrM8Jq0Vu.bat

                • Path C:\Users\Admin\AppData\Local\Temp\AONbrM8Jq0Vu.bat
                • Size 223B
                • SHA256 2254391c051835ab31aecf9c72770f489c059d00743d636d66b143649b23f14c
                • MD5 SHA1 SHA512

                YhInc4tRaiJH.bat

                • Path C:\Users\Admin\AppData\Local\Temp\YhInc4tRaiJH.bat
                • Size 223B
                • SHA256 3119d02293fdc9b4b30fc8fdfd1054434a1370906a17908957ae9076ef63dc34
                • MD5 SHA1 SHA512

                chgoS9E8HYHU.bat

                • Path C:\Users\Admin\AppData\Local\Temp\chgoS9E8HYHU.bat
                • Size 223B
                • SHA256 9715a3a86b47456ea18263e7f410c8fc8a71c15bde47c4023eeb68b2261bd120
                • MD5 SHA1 SHA512

                evb599A.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\evb599A.tmp
                • Size 1KB
                • SHA256 37f1525dd9ab5989b6e46d5c394776e1042f0b4d7ca2fda300f09bddfc8cd90a
                • MD5 SHA1 SHA512

                evb5A18.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\evb5A18.tmp
                • Size 1KB
                • SHA256 ca1bd35c85a5c589fd50f0b6b67b09e78e71653ce18fdb8240b2f3455144cff0
                • MD5 SHA1 SHA512

                10-13-2025

                • Path C:\Users\Admin\AppData\Roaming\Logs\10-13-2025
                • Size 224B
                • SHA256 7ed292abc12d06b9213cfc22aea7c6057ebd61b8b9a29f184d51fe901ec5e81a
                • MD5 SHA1 SHA512

                10-13-2025

                • Path C:\Users\Admin\AppData\Roaming\Logs\10-13-2025
                • Size 224B
                • SHA256 45e95255b8aae3012e70b5d39297f20fd4ebbe786cd1bb988861607ff7e4fb0a
                • MD5 SHA1 SHA512

                10-13-2025

                • Path C:\Users\Admin\AppData\Roaming\Logs\10-13-2025
                • Size 224B
                • SHA256 96d3018ddd258478f7eda696465ec5a64cb595d4cde61ab777c03be4beb47754
                • MD5 SHA1 SHA512

                memory/72-37-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/72-18-0x00000000011A0000-0x00000000011FE000-memory.dmp

                memory/72-19-0x0000000005CE0000-0x0000000006286000-memory.dmp

                memory/72-20-0x0000000005820000-0x00000000058B2000-memory.dmp

                memory/72-21-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/72-22-0x00000000058C0000-0x0000000005926000-memory.dmp

                memory/72-23-0x00000000065D0000-0x00000000065E2000-memory.dmp

                memory/72-24-0x0000000006A20000-0x0000000006A5C000-memory.dmp

                memory/72-26-0x0000000006D90000-0x0000000006D9A000-memory.dmp

                memory/728-32-0x0000000002500000-0x000000000252A000-memory.dmp

                memory/728-31-0x00000000001C0000-0x00000000001CC000-memory.dmp

                memory/728-33-0x0000000004B10000-0x0000000004B66000-memory.dmp

                memory/2512-47-0x0000000000B60000-0x0000000000BBE000-memory.dmp

                memory/3516-41-0x0000000140000000-0x00000001400C0000-memory.dmp

                memory/3516-14-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/3516-17-0x0000000002440000-0x000000000245B000-memory.dmp

                memory/3516-16-0x0000000180000000-0x000000018095D000-memory.dmp

                memory/3516-2-0x00007FFE90CA4000-0x00007FFE90CA5000-memory.dmp

                memory/3516-10-0x0000000002440000-0x000000000245B000-memory.dmp

                memory/3516-42-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/3516-0-0x0000000140000000-0x00000001400C0000-memory.dmp

                memory/3516-12-0x0000000002440000-0x000000000245B000-memory.dmp

                memory/3516-5-0x0000000180000000-0x000000018095D000-memory.dmp

                memory/3516-15-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/3516-53-0x0000000180000000-0x000000018095D000-memory.dmp

                memory/3516-4-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/3516-62-0x00007FFE90C00000-0x00007FFE90E09000-memory.dmp

                memory/3516-60-0x0000000180000000-0x000000018095D000-memory.dmp

                memory/4468-38-0x0000000000B30000-0x0000000000B8E000-memory.dmp

                memory/5640-28-0x0000000000D10000-0x0000000000D6E000-memory.dmp

                memory/5736-58-0x0000000001000000-0x000000000105E000-memory.dmp