Analysis

  • max time kernel
    130s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    22-01-2025 20:45

General

  • Target

    PERM.exe

  • Size

    3.1MB

  • MD5

    b0dd954ceb8a6f5f328c999877c8aae8

  • SHA1

    1a312b40a820e819f25ade7cbe633aad104855f3

  • SHA256

    91317ced2f4f13e3a9e32d85481811ac7ec8a497057f5b103a9d13915df9bd04

  • SHA512

    3b2c519990213dbff799849e244650024eb449d37f7124eb0d645cac6619bd3875e27b6446c6016a75fed3bf24e0f3aa252dbddc5a3652e0a3f376097c519fa7

  • SSDEEP

    49152:3vyI22SsaNYfdPBldt698dBcjH4oDkE2Hqk/+FpoGdOTHHB72eh2NT:3vf22SsaNYfdPBldt6+dBcjH4oDXr

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.115:4782

Mutex

0d2a5ea8-389a-4ca3-80ef-f0a24450d17f

Attributes
  • encryption_key

    CEBBCD296E028BCC0E5B98A92D532CD6055F1E6C

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

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 SetWindowsHookEx 1 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\PERM.exe
    "C:\Users\Admin\AppData\Local\Temp\PERM.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2792
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2804
    • 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:2860
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2316

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    b0dd954ceb8a6f5f328c999877c8aae8

    SHA1

    1a312b40a820e819f25ade7cbe633aad104855f3

    SHA256

    91317ced2f4f13e3a9e32d85481811ac7ec8a497057f5b103a9d13915df9bd04

    SHA512

    3b2c519990213dbff799849e244650024eb449d37f7124eb0d645cac6619bd3875e27b6446c6016a75fed3bf24e0f3aa252dbddc5a3652e0a3f376097c519fa7

  • memory/2792-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

    Filesize

    4KB

  • memory/2792-1-0x0000000000B20000-0x0000000000E44000-memory.dmp

    Filesize

    3.1MB

  • memory/2792-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2792-9-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2860-8-0x0000000000A30000-0x0000000000D54000-memory.dmp

    Filesize

    3.1MB

  • memory/2860-10-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2860-11-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2860-12-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

    Filesize

    9.9MB