Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/05/2024, 01:59

General

  • Target
    b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
  • Size 539KB
  • Sample240527-ceernscc5z
  • SHA256 b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.3.0.0

Botnet
  • Controlhost

C2
  • 121.43.158.106:4782

  • yc01h.11ychos.xyz:4782

Mutex
  • QSR_MUTEX_GFWuzMTNQOijYUKopR

Attributes
  • encryption_key

    Xym3BhtshKCyrit7obQT8XbWGz4i7Yw4

  • install_name

    Controlhost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Controlhost

  • subdirectory

    Controlhost

Signatures

  • Quasar RAT 4 IoCs

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Detects executables containing common artifacts observed in infostealers 1 IoCs
  • Checks computer location settings 2 TTPs 4 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Looks up external IP address via web service 3 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 4 IoCs
  • Runs ping.exe 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
    "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\EHh1Q4esfuPG.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4604
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:3156
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          3⤵
          • Quasar RAT
          • Runs ping.exe
          PID:2484
        • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
          "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
          3⤵
          • Checks computer location settings
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2468
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\UVRbVt1O94sx.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4412
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              5⤵
                PID:4500
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:1108
              • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                5⤵
                • Checks computer location settings
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:452
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DH6w4DvF07f7.bat" "
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4576
                  • C:\Windows\SysWOW64\chcp.com
                    chcp 65001
                    7⤵
                      PID:2444
                    • C:\Windows\SysWOW64\PING.EXE
                      ping -n 10 localhost
                      7⤵
                      • Runs ping.exe
                      PID:4556
                    • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                      "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                      7⤵
                      • Checks computer location settings
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of SetWindowsHookEx
                      • Suspicious use of WriteProcessMemory
                      PID:1380
                      • C:\Windows\SysWOW64\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\sKjbqxzRbT0w.bat" "
                        8⤵
                        • Suspicious use of WriteProcessMemory
                        PID:2064
                        • C:\Windows\SysWOW64\chcp.com
                          chcp 65001
                          9⤵
                            PID:4992
                          • C:\Windows\SysWOW64\PING.EXE
                            ping -n 10 localhost
                            9⤵
                            • Runs ping.exe
                            PID:4444
                          • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                            "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                            9⤵
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of SetWindowsHookEx
                            PID:2528
                        • C:\Windows\SysWOW64\WerFault.exe
                          C:\Windows\SysWOW64\WerFault.exe -u -p 1380 -s 2308
                          8⤵
                          • Program crash
                          PID:3836
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 452 -s 2316
                      6⤵
                      • Program crash
                      PID:1668
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 2468 -s 2088
                  4⤵
                  • Program crash
                  PID:2320
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 2116
              2⤵
              • Program crash
              PID:1644
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3772,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=1268 /prefetch:8
            1⤵
              PID:2588
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4400 -ip 4400
              1⤵
                PID:4732
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 2468 -ip 2468
                1⤵
                  PID:3156
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 452 -ip 452
                  1⤵
                    PID:3308
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1380 -ip 1380
                    1⤵
                      PID:1496

                    Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

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                          Downloads

                          DH6w4DvF07f7.bat

                          • Path C:\Users\Admin\AppData\Local\Temp\DH6w4DvF07f7.bat
                          • Size 261B
                          • SHA256 b2b2504f8e06369a84d9d4ffe68dc0838f7198b0d95ce4dc2463c1fbf48c5572
                          • MD5 SHA1 SHA512

                          EHh1Q4esfuPG.bat

                          • Path C:\Users\Admin\AppData\Local\Temp\EHh1Q4esfuPG.bat
                          • Size 261B
                          • SHA256 bad92167a1161d9bd4eb9a87c55f8ca74b9a0fece7f91f007f09a1a37351f489
                          • MD5 SHA1 SHA512

                          UVRbVt1O94sx.bat

                          • Path C:\Users\Admin\AppData\Local\Temp\UVRbVt1O94sx.bat
                          • Size 261B
                          • SHA256 6b19b9a3e373010accf4cd66906da98bc8a2c9d9b0a5611ddf0df5982c80daf3
                          • MD5 SHA1 SHA512

                          sKjbqxzRbT0w.bat

                          • Path C:\Users\Admin\AppData\Local\Temp\sKjbqxzRbT0w.bat
                          • Size 261B
                          • SHA256 9b86a6f4ff914906de83e819cace55c47f27482cd47153c2d67374e7907f5288
                          • MD5 SHA1 SHA512

                          05-27-2024

                          • Path C:\Users\Admin\AppData\Roaming\Logs\05-27-2024
                          • Size 224B
                          • SHA256 2a6c089e0bc141f993ffa1cffcdcb70703b46a15c9b6277e077181d69183455a
                          • MD5 SHA1 SHA512

                          05-27-2024

                          • Path C:\Users\Admin\AppData\Roaming\Logs\05-27-2024
                          • Size 224B
                          • SHA256 1f6eaaf1ae9440fafbbdc292178dfdf5fdf31be07c7cb9ee2a5bc9113a14a43b
                          • MD5 SHA1 SHA512

                          05-27-2024

                          • Path C:\Users\Admin\AppData\Roaming\Logs\05-27-2024
                          • Size 224B
                          • SHA256 039f8261c299769ea234eb54306d2c2137266071caa4a669f9fca946f7bd6b9e
                          • MD5 SHA1 SHA512

                          05-27-2024

                          • Path C:\Users\Admin\AppData\Roaming\Logs\05-27-2024
                          • Size 224B
                          • SHA256 b1e83ed8d369d9110a4bffb93c96c23b33855ab95bfea2290640d39cfacc6f35
                          • MD5 SHA1 SHA512

                          memory/2468-29-0x0000000074550000-0x00000000745FB000-memory.dmp

                          memory/2468-24-0x0000000074550000-0x00000000745FB000-memory.dmp

                          memory/2468-21-0x0000000074550000-0x00000000745FB000-memory.dmp

                          memory/4400-6-0x00000000064F0000-0x0000000006502000-memory.dmp

                          memory/4400-9-0x0000000006F20000-0x0000000006F70000-memory.dmp

                          memory/4400-14-0x000000007458E000-0x000000007458F000-memory.dmp

                          memory/4400-15-0x0000000074580000-0x0000000074D30000-memory.dmp

                          memory/4400-11-0x0000000007320000-0x000000000733A000-memory.dmp

                          memory/4400-20-0x0000000074580000-0x0000000074D30000-memory.dmp

                          memory/4400-10-0x0000000006EF0000-0x0000000006EFA000-memory.dmp

                          memory/4400-12-0x0000000007AA0000-0x0000000007B52000-memory.dmp

                          memory/4400-8-0x0000000007480000-0x0000000007A98000-memory.dmp

                          memory/4400-7-0x0000000006B70000-0x0000000006BAC000-memory.dmp

                          memory/4400-0-0x000000007458E000-0x000000007458F000-memory.dmp

                          memory/4400-5-0x0000000005790000-0x00000000057F6000-memory.dmp

                          memory/4400-4-0x0000000074580000-0x0000000074D30000-memory.dmp

                          memory/4400-3-0x00000000056B0000-0x0000000005742000-memory.dmp

                          memory/4400-2-0x0000000005D40000-0x00000000062E4000-memory.dmp

                          memory/4400-1-0x0000000000C00000-0x0000000000C8C000-memory.dmp