Analysis

  • max time kernel
    131s
  • max time network
    147s
  • 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, 12:11

General

  • Target

    1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616.exe

  • Size

    348KB

  • MD5

    99a2e914bbf4c8410c8c57bf24901919

  • SHA1

    8af5cc6ebba0bd365fa8accd92610c71380d93f7

  • SHA256

    1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616

  • SHA512

    f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

  • SSDEEP

    6144:+uwb/c2L0tR/i/3d96vxbh+fy3+ExETXWg3WKwt4d:hH2L+ive3r+0EqgmK24d

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_cXyKUgoh2Hpnny6zAV

Attributes
  • encryption_key

    GTemocnTKzZZHIqpqBGg

  • 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\1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616.exe
    "C:\Users\Admin\AppData\Local\Temp\1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2852
    • 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:4824
      • 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:3900

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    348KB

    MD5

    99a2e914bbf4c8410c8c57bf24901919

    SHA1

    8af5cc6ebba0bd365fa8accd92610c71380d93f7

    SHA256

    1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616

    SHA512

    f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

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

    Filesize

    348KB

    MD5

    99a2e914bbf4c8410c8c57bf24901919

    SHA1

    8af5cc6ebba0bd365fa8accd92610c71380d93f7

    SHA256

    1fc3469378a92b852065e463b99e5b0cab8d8ba9d2fde12c05baa1454673b616

    SHA512

    f3b667faecf82c2b0528be0febcb9d2c21f54725fc2b9be03616c8398d849664571f04dda5364af6dc63d3351f51f5906f9f31fcec8e4b99ea18189d55d824cc

  • memory/2700-116-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-117-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-118-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-119-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-120-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-121-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-122-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-123-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-124-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-125-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-126-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-127-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-128-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-129-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-130-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-131-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-132-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-133-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-134-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-135-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-136-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-137-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-138-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-139-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-140-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-141-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-142-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-143-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-144-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-145-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-146-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-147-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-148-0x0000000000A10000-0x0000000000A6E000-memory.dmp

    Filesize

    376KB

  • memory/2700-149-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-150-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-151-0x00000000057C0000-0x0000000005CBE000-memory.dmp

    Filesize

    5.0MB

  • memory/2700-152-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-153-0x00000000053A0000-0x0000000005432000-memory.dmp

    Filesize

    584KB

  • memory/2700-154-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-155-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-156-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-157-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-158-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-159-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-160-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-161-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-162-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-163-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-164-0x00000000052C0000-0x0000000005326000-memory.dmp

    Filesize

    408KB

  • memory/2700-165-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-166-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-167-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-168-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-169-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-170-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-171-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-172-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-173-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-174-0x0000000006020000-0x0000000006032000-memory.dmp

    Filesize

    72KB

  • memory/2700-175-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-176-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-177-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-178-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-179-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-180-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-181-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-182-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-183-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-184-0x0000000077840000-0x00000000779CE000-memory.dmp

    Filesize

    1.6MB

  • memory/2700-195-0x0000000006410000-0x000000000644E000-memory.dmp

    Filesize

    248KB

  • memory/4824-315-0x0000000006620000-0x000000000662A000-memory.dmp

    Filesize

    40KB