Analysis

  • max time kernel
    4s
  • max time network
    74s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/04/2024, 00:58

General

  • Target
    9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5.exe
  • Size 2.0MB
  • Sample240402-bb1z3acd93
  • SHA256 9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • azorult

C2
  • http://0x21.in:8000/_az/

Extracted

Family
  • quasar

Version
  • 1.3.0.0

Botnet
  • EbayProfiles

C2
  • 5.8.88.191:443

  • sockartek.icu:443

Mutex
  • QSR_MUTEX_0kBRNrRz5TDLEQouI0

Attributes
  • encryption_key

    MWhG6wsClMX8aJM2CVXT

  • install_name

    winsock.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    win defender run

  • subdirectory

    SubDir

Signatures

  • Azorult

    An information stealer that was first discovered in 2016, targeting browsing history and passwords.

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 3 IoCs
  • Detects executables containing common artifacts observed in infostealers 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 IoCs

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

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 4 IoCs
  • Creates scheduled task(s) 1 TTPs 5 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5.exe
    "C:\Users\Admin\AppData\Local\Temp\9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5.exe"
    1⤵
    • Checks computer location settings
    • Enumerates connected drives
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2260
    • C:\Users\Admin\AppData\Local\Temp\vnc.exe
      "C:\Users\Admin\AppData\Local\Temp\vnc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4036
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k
        3⤵
          PID:2748
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4036 -s 548
          3⤵
          • Program crash
          PID:4344
      • C:\Users\Admin\AppData\Local\Temp\windef.exe
        "C:\Users\Admin\AppData\Local\Temp\windef.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:344
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "win defender run" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\windef.exe" /rl HIGHEST /f
          3⤵
          • Creates scheduled task(s)
          PID:4184
        • C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:5048
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "win defender run" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe" /rl HIGHEST /f
            4⤵
            • Creates scheduled task(s)
            PID:4208
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CWRrbZRsp2RF.bat" "
            4⤵
              PID:3044
              • C:\Windows\SysWOW64\chcp.com
                chcp 65001
                5⤵
                  PID:712
                • C:\Windows\SysWOW64\PING.EXE
                  ping -n 10 localhost
                  5⤵
                  • Runs ping.exe
                  PID:4332
                • C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe"
                  5⤵
                    PID:4228
                    • C:\Windows\SysWOW64\schtasks.exe
                      "schtasks" /create /tn "win defender run" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe" /rl HIGHEST /f
                      6⤵
                      • Creates scheduled task(s)
                      PID:4280
                    • C:\Windows\SysWOW64\cmd.exe
                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\W3uDDEgz12sO.bat" "
                      6⤵
                        PID:2200
                      • C:\Windows\SysWOW64\WerFault.exe
                        C:\Windows\SysWOW64\WerFault.exe -u -p 4228 -s 2260
                        6⤵
                        • Program crash
                        PID:4288
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 5048 -s 2252
                    4⤵
                    • Program crash
                    PID:4760
              • C:\Users\Admin\AppData\Local\Temp\9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5.exe
                "C:\Users\Admin\AppData\Local\Temp\9a745985851e320444d5f5535eb6bb65ca3f66401f4e6d8870951588bff95ba5.exe"
                2⤵
                  PID:4296
                • C:\Windows\SysWOW64\schtasks.exe
                  "C:\Windows\SysWOW64\schtasks.exe" /create /tn RtkAudioService64 /tr "C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe" /sc minute /mo 1 /F
                  2⤵
                  • Creates scheduled task(s)
                  PID:3120
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4036 -ip 4036
                1⤵
                  PID:3856
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 5048 -ip 5048
                  1⤵
                    PID:4740
                  • C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe
                    C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe
                    1⤵
                      PID:2592
                      • C:\Users\Admin\AppData\Local\Temp\vnc.exe
                        "C:\Users\Admin\AppData\Local\Temp\vnc.exe"
                        2⤵
                          PID:1412
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k
                            3⤵
                              PID:4476
                            • C:\Windows\SysWOW64\WerFault.exe
                              C:\Windows\SysWOW64\WerFault.exe -u -p 1412 -s 520
                              3⤵
                              • Program crash
                              PID:788
                          • C:\Users\Admin\AppData\Local\Temp\windef.exe
                            "C:\Users\Admin\AppData\Local\Temp\windef.exe"
                            2⤵
                              PID:3596
                            • C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe
                              "C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe"
                              2⤵
                                PID:2120
                              • C:\Windows\SysWOW64\schtasks.exe
                                "C:\Windows\SysWOW64\schtasks.exe" /create /tn RtkAudioService64 /tr "C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe" /sc minute /mo 1 /F
                                2⤵
                                • Creates scheduled task(s)
                                PID:1292
                            • C:\Windows\SysWOW64\WerFault.exe
                              C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1412 -ip 1412
                              1⤵
                                PID:3668
                              • C:\Windows\SysWOW64\WerFault.exe
                                C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 4228 -ip 4228
                                1⤵
                                  PID:3244

                                Network

                                      MITRE ATT&CK Enterprise v15

                                      Replay Monitor

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                                      Downloads

                                      windef.exe.log

                                      • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\windef.exe.log
                                      • Size 1KB
                                      • SHA256 f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928
                                      • MD5 SHA1 SHA512

                                      CWRrbZRsp2RF.bat

                                      • Path C:\Users\Admin\AppData\Local\Temp\CWRrbZRsp2RF.bat
                                      • Size 208B
                                      • SHA256 2eb93f3931092dbd118c3f6bd8d4d2d601002c777346d681ed37906b886617a1
                                      • MD5 SHA1 SHA512

                                      W3uDDEgz12sO.bat

                                      • Path C:\Users\Admin\AppData\Local\Temp\W3uDDEgz12sO.bat
                                      • Size 208B
                                      • SHA256 26f6febca75de7a62082b2ffdb9f8f47c135fdac6415e042c7675800e8042426
                                      • MD5 SHA1 SHA512

                                      vnc.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\vnc.exe
                                      • Size 405KB
                                      • SHA256 4e8a99cd33c9e5c747a3ce8f1a3e17824846f4a8f7cb0631aebd0815db2ce3a4
                                      • MD5 SHA1 SHA512 SSDEEP

                                      windef.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\windef.exe
                                      • Size 349KB
                                      • SHA256 7050608d53f80269df951d00883ed79815c060ce7678a76b5c3f6a2a985beea9
                                      • MD5 SHA1 SHA512 SSDEEP

                                      04-02-2024

                                      • Path C:\Users\Admin\AppData\Roaming\Logs\04-02-2024
                                      • Size 224B
                                      • SHA256 9946dbdc9f108f21c5844ee0dc34f4184fd1e92dd23884ba5335a42644fb538e
                                      • MD5 SHA1 SHA512

                                      SystemPropertiesPerformance.exe

                                      • Path C:\Users\Admin\btpanui\SystemPropertiesPerformance.exe
                                      • Size 2.0MB
                                      • SHA256 bf34cd093f5b2a06ce29ef1616c865e2e9051a198f16e3864be1274799ab8e54
                                      • MD5 SHA1 SHA512 SSDEEP

                                      memory/344-34-0x0000000005150000-0x00000000051E2000-memory.dmp

                                      memory/344-31-0x0000000005660000-0x0000000005C04000-memory.dmp

                                      memory/344-35-0x00000000051F0000-0x0000000005200000-memory.dmp

                                      memory/344-36-0x0000000005200000-0x0000000005266000-memory.dmp

                                      memory/344-37-0x0000000005F50000-0x0000000005F62000-memory.dmp

                                      memory/344-38-0x0000000006490000-0x00000000064CC000-memory.dmp

                                      memory/344-45-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/344-30-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/344-28-0x0000000000820000-0x000000000087E000-memory.dmp

                                      memory/2260-21-0x0000000003B60000-0x0000000003B61000-memory.dmp

                                      memory/3596-82-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/4228-58-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/4228-81-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/4228-84-0x0000000004FE0000-0x0000000004FF0000-memory.dmp

                                      memory/4296-29-0x0000000000400000-0x0000000000420000-memory.dmp

                                      memory/4296-19-0x0000000000400000-0x0000000000420000-memory.dmp

                                      memory/5048-51-0x0000000005160000-0x0000000005170000-memory.dmp

                                      memory/5048-56-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/5048-50-0x0000000072C60000-0x0000000073410000-memory.dmp

                                      memory/5048-49-0x00000000065D0000-0x00000000065DA000-memory.dmp

                                      memory/5048-47-0x0000000005160000-0x0000000005170000-memory.dmp

                                      memory/5048-46-0x0000000072C60000-0x0000000073410000-memory.dmp