Analysis

  • max time kernel
    329s
  • max time network
    333s
  • platform
    windows7_x64
  • resource
    win7-20230712-en
  • resource tags

    arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
  • submitted
    04-08-2023 15:59

General

  • Target

    Remote Administration Tool.exe

  • Size

    3.1MB

  • MD5

    73dcb3b3b59192b45f1975fc7a8e9d08

  • SHA1

    5fdaa30f92acc816c3b43db076f98c91391a3588

  • SHA256

    d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

  • SHA512

    adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

  • SSDEEP

    49152:zv2I22SsaNYfdPBldt698dBcjHPby3EfsAk/WPPoGdfTHHB72eh2NT:zvb22SsaNYfdPBldt6+dBcjHPby2H

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Infected

C2

AmirAmir8565-20409.portmap.host:20409

Mutex

ff410ede-beff-4970-8e12-7d251057f1fd

Attributes
  • encryption_key

    1B172706DED462B59F2A5056AB06A8DD1EE8491B

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Realtek Audio

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Remote Administration Tool.exe
    "C:\Users\Admin\AppData\Local\Temp\Remote Administration Tool.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Realtek Audio" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2560
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2552
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Realtek Audio" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:1680

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

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    Filesize

    3.1MB

    MD5

    73dcb3b3b59192b45f1975fc7a8e9d08

    SHA1

    5fdaa30f92acc816c3b43db076f98c91391a3588

    SHA256

    d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

    SHA512

    adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    Filesize

    3.1MB

    MD5

    73dcb3b3b59192b45f1975fc7a8e9d08

    SHA1

    5fdaa30f92acc816c3b43db076f98c91391a3588

    SHA256

    d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

    SHA512

    adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

  • memory/1964-54-0x0000000000D90000-0x00000000010B4000-memory.dmp
    Filesize

    3.1MB

  • memory/1964-55-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp
    Filesize

    9.9MB

  • memory/1964-56-0x000000001B0B0000-0x000000001B130000-memory.dmp
    Filesize

    512KB

  • memory/1964-64-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp
    Filesize

    9.9MB

  • memory/2552-62-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp
    Filesize

    9.9MB

  • memory/2552-63-0x0000000001020000-0x0000000001344000-memory.dmp
    Filesize

    3.1MB

  • memory/2552-65-0x0000000000DB0000-0x0000000000E30000-memory.dmp
    Filesize

    512KB

  • memory/2552-66-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp
    Filesize

    9.9MB

  • memory/2552-67-0x0000000000DB0000-0x0000000000E30000-memory.dmp
    Filesize

    512KB