Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    17-12-2024 03:25

General

  • Target

    78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12.exe

  • Size

    502KB

  • MD5

    e3cfe28100238a1001c8cca4af39c574

  • SHA1

    9b80ea180a8f4cec6f787b6b57e51dc10e740f75

  • SHA256

    78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12

  • SHA512

    511e8a150d6539f555470367933e5f35b00d129d3ed3e97954da57f402d18711dfc86c93acc26f5c2b1b18bd554b8ea4af1ad541cd2564b793acc65251757324

  • SSDEEP

    6144:xTEgdc0YtX7IxUpGREWutr/mrBcgP+cbbWTtySdcE8Ob8F7mvAXi8exPLcTR3y:xTEgdfY2xUT/FxqWTtnMpSvADmcdy

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

svhost

C2

151.177.61.79:4782

Mutex

a148a6d8-1253-4e62-bc5f-c0242dd62e69

Attributes
  • encryption_key

    5BEC1A8BC6F8F695D1337C51454E0B7F3A4FE968

  • install_name

    svhost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svhost

  • subdirectory

    svhost

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Scheduled Task/Job: Scheduled Task 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 9 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\78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12.exe
    "C:\Users\Admin\AppData\Local\Temp\78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2412
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1792
    • C:\Users\Admin\AppData\Roaming\svhost\svhost.exe
      "C:\Users\Admin\AppData\Roaming\svhost\svhost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2304
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\svhost\svhost.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svhost\svhost.exe

    Filesize

    502KB

    MD5

    e3cfe28100238a1001c8cca4af39c574

    SHA1

    9b80ea180a8f4cec6f787b6b57e51dc10e740f75

    SHA256

    78f9c811e589ff1f25d363080ce8d338fa68f6d2a220b1dd0360e799bbc17a12

    SHA512

    511e8a150d6539f555470367933e5f35b00d129d3ed3e97954da57f402d18711dfc86c93acc26f5c2b1b18bd554b8ea4af1ad541cd2564b793acc65251757324

  • memory/2304-7-0x0000000000890000-0x0000000000914000-memory.dmp

    Filesize

    528KB

  • memory/2304-8-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

    Filesize

    9.9MB

  • memory/2304-9-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

    Filesize

    9.9MB

  • memory/2304-11-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

    Filesize

    9.9MB

  • memory/2412-0-0x000007FEF56A3000-0x000007FEF56A4000-memory.dmp

    Filesize

    4KB

  • memory/2412-1-0x0000000001370000-0x00000000013F4000-memory.dmp

    Filesize

    528KB

  • memory/2412-2-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

    Filesize

    9.9MB

  • memory/2412-10-0x000007FEF56A0000-0x000007FEF608C000-memory.dmp

    Filesize

    9.9MB