Analysis

  • max time kernel
    1s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    15-04-2024 01:18

General

  • Target

    a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a.exe

  • Size

    2.0MB

  • MD5

    d7baaeddb13d05a6bd94a61306bc9846

  • SHA1

    8777a2e9aa71924deea930d058ab83d5decc408e

  • SHA256

    a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a

  • SHA512

    cda205d7d3ea4d222be89296458ddff37a5d1eb536c7e0d9130b85e2ddc4cd02673824d7ff1c2a846ca2c7b3d2d868ac8aeb6914c4430137108b22fa65d60afe

  • SSDEEP

    24576:su6J33O0c+JY5UZ+XC0kGso6FaI1IXgM6YmenKKSUlmDaGJTA4Pqa6jUvOkQwKYJ:2u0c++OCvkGs9Fap5aLKLkDl+dUvO9Y7

Malware Config

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

Extracted

Family

azorult

C2

http://0x21.in:8000/_az/

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
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 11 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.

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

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a.exe
    "C:\Users\Admin\AppData\Local\Temp\a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2916
    • 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:768
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k
        3⤵
          PID:1732
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 768 -s 160
          3⤵
          • Loads dropped DLL
          • Program crash
          PID:2428
      • C:\Users\Admin\AppData\Local\Temp\windef.exe
        "C:\Users\Admin\AppData\Local\Temp\windef.exe"
        2⤵
        • Executes dropped EXE
        PID:2528
        • 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:2848
        • C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\winsock.exe"
          3⤵
            PID:2996
            • 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:2480
        • C:\Users\Admin\AppData\Local\Temp\a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a.exe
          "C:\Users\Admin\AppData\Local\Temp\a41e196cc8e426b7f3100e3683e0adfca4c6db99155d47f7ad035a522e9dd38a.exe"
          2⤵
            PID:2576
          • 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:2444

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Execution

        Scheduled Task/Job

        1
        T1053

        Persistence

        Scheduled Task/Job

        1
        T1053

        Privilege Escalation

        Scheduled Task/Job

        1
        T1053

        Discovery

        Query Registry

        1
        T1012

        Peripheral Device Discovery

        1
        T1120

        System Information Discovery

        2
        T1082

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • \Users\Admin\AppData\Local\Temp\vnc.exe
          Filesize

          405KB

          MD5

          b8ba87ee4c3fc085a2fed0d839aadce1

          SHA1

          b3a2e3256406330e8b1779199bb2b9865122d766

          SHA256

          4e8a99cd33c9e5c747a3ce8f1a3e17824846f4a8f7cb0631aebd0815db2ce3a4

          SHA512

          7a775a12cd5bcd182d64be0d31f800b456ca6d1b531189cea9c72e1940871cfe92ccd005938f67bfa4784ae44c54b3a7ea29a5bb59766e98c78bf53b680f2ab2

        • \Users\Admin\AppData\Local\Temp\windef.exe
          Filesize

          349KB

          MD5

          b4a202e03d4135484d0e730173abcc72

          SHA1

          01b30014545ea526c15a60931d676f9392ea0c70

          SHA256

          7050608d53f80269df951d00883ed79815c060ce7678a76b5c3f6a2a985beea9

          SHA512

          632a035a3b722ea29b02aad1f0da3df5bdc38abc7e6617223790955c6c0830f1070b528680416d5c63ea5e846074cdad87f06c21c35a77b1ccc4edc089d8b1fb

        • memory/2528-30-0x0000000001110000-0x000000000116E000-memory.dmp
          Filesize

          376KB

        • memory/2528-62-0x0000000073D60000-0x000000007444E000-memory.dmp
          Filesize

          6.9MB

        • memory/2528-50-0x0000000004A70000-0x0000000004AB0000-memory.dmp
          Filesize

          256KB

        • memory/2528-49-0x0000000073D60000-0x000000007444E000-memory.dmp
          Filesize

          6.9MB

        • memory/2576-46-0x0000000000080000-0x00000000000A0000-memory.dmp
          Filesize

          128KB

        • memory/2576-39-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp
          Filesize

          4KB

        • memory/2576-33-0x0000000000080000-0x00000000000A0000-memory.dmp
          Filesize

          128KB

        • memory/2576-31-0x0000000000080000-0x00000000000A0000-memory.dmp
          Filesize

          128KB

        • memory/2916-51-0x0000000004A70000-0x0000000004AB0000-memory.dmp
          Filesize

          256KB

        • memory/2996-60-0x0000000000120000-0x000000000017E000-memory.dmp
          Filesize

          376KB

        • memory/2996-61-0x0000000073D60000-0x000000007444E000-memory.dmp
          Filesize

          6.9MB

        • memory/2996-63-0x0000000001ED0000-0x0000000001F10000-memory.dmp
          Filesize

          256KB