Analysis

  • max time kernel
    134s
  • max time network
    135s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/08/2024, 23:34

General

  • Target

    svchost.exe

  • Size

    409KB

  • MD5

    e8d65fc5ddc235ab81a78b0caebe13c8

  • SHA1

    f2200ae68ba21fbbf7e854281e4ab636e3a256e3

  • SHA256

    41ed0732dc7032c3e345ea7dfa9522803d2b306e1ef149ebdd74f7ecfe9f17e8

  • SHA512

    afe6cf22e57eac8589d1e2fbf198eee75795969a5f2e81a804a2569e411a16a161d618e7edc2b816ec55b0bfba4ea9c33f017af51d6f382076c517ab7b93f30c

  • SSDEEP

    12288:qpiREGJMIexhVD+R5aa9vM4DRShuISW2JM:uwpJUi39vM4DRAuQ

Malware Config

Extracted

Family

quasar

Version

3.1.5

Botnet

SeroXen | v3.1.5 |

C2

dating-mpegs.gl.at.ply.gg:6566

Mutex

$Sxr-jy6vh8CtEJL5ceZuIb

Attributes
  • encryption_key

    M1SAZZUtbnQqZ8RvEnLb

  • install_name

    $sxr-powershell.exe

  • log_directory

    $sxr-Logs

  • reconnect_delay

    3000

  • startup_key

    Powershell

  • subdirectory

    $sxr-seroxen2

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 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.

  • Drops file in System32 directory 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 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 3 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2516
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /rl HIGHEST /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2236
    • C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe
      "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1784
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Powershell" /sc ONLOGON /tr "C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5068
    • C:\Windows\SysWOW64\SCHTASKS.exe
      "SCHTASKS.exe" /create /tn "$77svchost.exe" /tr "'C:\Users\Admin\AppData\Local\Temp\svchost.exe'" /sc onlogon /rl HIGHEST
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3612
  • C:\Windows\system32\notepad.exe
    "C:\Windows\system32\notepad.exe"
    1⤵
    • Suspicious use of FindShellTrayWindow
    PID:3676

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\SysWOW64\$sxr-seroxen2\$sxr-powershell.exe

    Filesize

    409KB

    MD5

    e8d65fc5ddc235ab81a78b0caebe13c8

    SHA1

    f2200ae68ba21fbbf7e854281e4ab636e3a256e3

    SHA256

    41ed0732dc7032c3e345ea7dfa9522803d2b306e1ef149ebdd74f7ecfe9f17e8

    SHA512

    afe6cf22e57eac8589d1e2fbf198eee75795969a5f2e81a804a2569e411a16a161d618e7edc2b816ec55b0bfba4ea9c33f017af51d6f382076c517ab7b93f30c

  • memory/1784-20-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/1784-19-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/1784-18-0x00000000069A0000-0x00000000069AA000-memory.dmp

    Filesize

    40KB

  • memory/1784-14-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/1784-13-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/2516-3-0x0000000005A50000-0x0000000005AE2000-memory.dmp

    Filesize

    584KB

  • memory/2516-7-0x0000000006CF0000-0x0000000006D2E000-memory.dmp

    Filesize

    248KB

  • memory/2516-6-0x0000000005A20000-0x0000000005A32000-memory.dmp

    Filesize

    72KB

  • memory/2516-5-0x00000000059B0000-0x0000000005A16000-memory.dmp

    Filesize

    408KB

  • memory/2516-4-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/2516-16-0x0000000073580000-0x0000000073C6E000-memory.dmp

    Filesize

    6.9MB

  • memory/2516-0-0x000000007358E000-0x000000007358F000-memory.dmp

    Filesize

    4KB

  • memory/2516-2-0x0000000006100000-0x00000000065FE000-memory.dmp

    Filesize

    5.0MB

  • memory/2516-1-0x0000000000C90000-0x0000000000CFC000-memory.dmp

    Filesize

    432KB