Analysis

  • max time kernel
    147s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/03/2024, 02:19

General

  • Target

    c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe

  • Size

    3.1MB

  • MD5

    c4497b459274cec0b9fd6e3ac6c67aaa

  • SHA1

    1c8b8e42b8284b6dc2d2741850a9c01c07a5088f

  • SHA256

    c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582

  • SHA512

    bf64fd7a95dedd703a04cf661b35ebaa343dd7b2e907d1de20d16bcb91259b76ba9f80a817d391487eb5c4f549658ba545673b3b3f26cc45e0a16fecfff01c24

  • SSDEEP

    49152:Cvguf2NUaNmwzPWlvdaKM7ZxTwW3xbbRYLoGd7THHB72eh2NT:Cv/f2NUaNmwzPWlvdaB7ZxTwW3xQ

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

50 installs

C2

217.63.234.90:4444

217.63.234.90:1313

127.0.0.1:1313

Mutex

ef23a66e-d8e1-48c7-a533-50e2b78bea4a

Attributes
  • encryption_key

    6B0D9CDFBF22251A89F554E059B7463C8CDE0F0C

  • install_name

    svchost.exe

  • log_directory

    Logs50spread

  • reconnect_delay

    3000

  • startup_key

    svchost.exe

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 2 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
  • Detects executables containing common artifacts observed in infostealers 2 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 WriteProcessMemory 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe
    "C:\Users\Admin\AppData\Local\Temp\c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2376
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:3552
    • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2168
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe

    Filesize

    3.1MB

    MD5

    c4497b459274cec0b9fd6e3ac6c67aaa

    SHA1

    1c8b8e42b8284b6dc2d2741850a9c01c07a5088f

    SHA256

    c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582

    SHA512

    bf64fd7a95dedd703a04cf661b35ebaa343dd7b2e907d1de20d16bcb91259b76ba9f80a817d391487eb5c4f549658ba545673b3b3f26cc45e0a16fecfff01c24

  • memory/2168-9-0x00007FFBD9580000-0x00007FFBDA041000-memory.dmp

    Filesize

    10.8MB

  • memory/2168-11-0x000000001AFB0000-0x000000001B000000-memory.dmp

    Filesize

    320KB

  • memory/2168-12-0x000000001CC00000-0x000000001CCB2000-memory.dmp

    Filesize

    712KB

  • memory/2168-15-0x000000001C380000-0x000000001C392000-memory.dmp

    Filesize

    72KB

  • memory/2168-16-0x000000001D500000-0x000000001D53C000-memory.dmp

    Filesize

    240KB

  • memory/2168-17-0x00007FFBD9580000-0x00007FFBDA041000-memory.dmp

    Filesize

    10.8MB

  • memory/2376-0-0x0000000000B70000-0x0000000000E94000-memory.dmp

    Filesize

    3.1MB

  • memory/2376-1-0x00007FFBD9580000-0x00007FFBDA041000-memory.dmp

    Filesize

    10.8MB

  • memory/2376-2-0x000000001B9E0000-0x000000001B9F0000-memory.dmp

    Filesize

    64KB

  • memory/2376-10-0x00007FFBD9580000-0x00007FFBDA041000-memory.dmp

    Filesize

    10.8MB