Analysis

  • max time kernel
    53s
  • max time network
    152s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    18/01/2023, 12:18

General

  • Target

    3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87.exe

  • Size

    348KB

  • MD5

    3227a70d123b9da999bf150fdf605036

  • SHA1

    1b959876c589dc17b0d7084a8f3017123e8568af

  • SHA256

    3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87

  • SHA512

    1c75060b544047c0a6d39822014c85bb5bba8e14b4432b2a291bc9e2b8e55c156f9736d1483f8f8f226961aa663a9fc20919e6d2812faf38ceb2f262e31ae8ae

  • SSDEEP

    6144:8uwb/c2L0tBYYOtUEbtZTl8MNtX2MwE+:bH2Ll5tVZeMNtX2M7+

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

188.119.45.143:9896

microsoftstolewindows.duckdns.org:9896

192.168.1.52:9896

Mutex

QSR_MUTEX_ZhL1p5SiHTlBKUYEsI

Attributes
  • encryption_key

    sBg2G8lxZ2VaMwfKc6V3

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svchost

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 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
  • 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\3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87.exe
    "C:\Users\Admin\AppData\Local\Temp\3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4936
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:5108
    • C:\Windows\SysWOW64\SubDir\svchost.exe
      "C:\Windows\SysWOW64\SubDir\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1720
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\svchost.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:696

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\SysWOW64\SubDir\svchost.exe

    Filesize

    348KB

    MD5

    3227a70d123b9da999bf150fdf605036

    SHA1

    1b959876c589dc17b0d7084a8f3017123e8568af

    SHA256

    3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87

    SHA512

    1c75060b544047c0a6d39822014c85bb5bba8e14b4432b2a291bc9e2b8e55c156f9736d1483f8f8f226961aa663a9fc20919e6d2812faf38ceb2f262e31ae8ae

  • C:\Windows\SysWOW64\SubDir\svchost.exe

    Filesize

    348KB

    MD5

    3227a70d123b9da999bf150fdf605036

    SHA1

    1b959876c589dc17b0d7084a8f3017123e8568af

    SHA256

    3ecf24e572980c093d67046cf6480284f96224e3e887ef3854428e1fec0adc87

    SHA512

    1c75060b544047c0a6d39822014c85bb5bba8e14b4432b2a291bc9e2b8e55c156f9736d1483f8f8f226961aa663a9fc20919e6d2812faf38ceb2f262e31ae8ae

  • memory/1720-315-0x0000000007320000-0x000000000732A000-memory.dmp

    Filesize

    40KB

  • memory/4936-149-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-148-0x0000000000E30000-0x0000000000E8E000-memory.dmp

    Filesize

    376KB

  • memory/4936-118-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-119-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-120-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-121-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-122-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-123-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-124-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-125-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-126-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-127-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-128-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-129-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-130-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-131-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-132-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-133-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-134-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-135-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-136-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-137-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-138-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-139-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-140-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-141-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-142-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-143-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-144-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-145-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-146-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-147-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-151-0x0000000005AF0000-0x0000000005FEE000-memory.dmp

    Filesize

    5.0MB

  • memory/4936-116-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-117-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-150-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-165-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-153-0x0000000005700000-0x0000000005792000-memory.dmp

    Filesize

    584KB

  • memory/4936-154-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-155-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-156-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-157-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-158-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-159-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-160-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-161-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-162-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-163-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-164-0x0000000005FF0000-0x0000000006056000-memory.dmp

    Filesize

    408KB

  • memory/4936-152-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-166-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-167-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-168-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-169-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-170-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-171-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-172-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-173-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-174-0x0000000006640000-0x0000000006652000-memory.dmp

    Filesize

    72KB

  • memory/4936-175-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-176-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-177-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-178-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-179-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-180-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-181-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-182-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-183-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-184-0x0000000077520000-0x00000000776AE000-memory.dmp

    Filesize

    1.6MB

  • memory/4936-195-0x0000000006A30000-0x0000000006A6E000-memory.dmp

    Filesize

    248KB