Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/12/2022, 12:46

General

  • Target

    tmp.exe

  • Size

    502KB

  • MD5

    bbd0db3230e57aeb7ca23e59aadf0134

  • SHA1

    fdda0bfd08bbd74557dd878bda12f05368befb7d

  • SHA256

    741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7

  • SHA512

    4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3

  • SSDEEP

    6144:VTEgdc0YpXAGbgiIN2RSBuSBtPB+a9VIvyTcEi9b8F9vkDC+ROcTR32:VTEgdfYlbgRljSCN8CQOcd2

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

flingmodder-53370.portmap.io:53370

Mutex

c16cce68-0a86-440c-89b1-c088c1c8b4cb

Attributes
  • encryption_key

    9BFDFBA45AE2C2C16DA4EEEA02438784B89CACC0

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svchost

  • subdirectory

    windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4656
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\tmp.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:4544
    • C:\Users\Admin\AppData\Roaming\windows\svchost.exe
      "C:\Users\Admin\AppData\Roaming\windows\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2556
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\windows\svchost.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3724

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    502KB

    MD5

    bbd0db3230e57aeb7ca23e59aadf0134

    SHA1

    fdda0bfd08bbd74557dd878bda12f05368befb7d

    SHA256

    741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7

    SHA512

    4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3

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

    Filesize

    502KB

    MD5

    bbd0db3230e57aeb7ca23e59aadf0134

    SHA1

    fdda0bfd08bbd74557dd878bda12f05368befb7d

    SHA256

    741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7

    SHA512

    4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3

  • memory/2556-139-0x00007FFE1C5A0000-0x00007FFE1D061000-memory.dmp

    Filesize

    10.8MB

  • memory/2556-141-0x000000001C340000-0x000000001C390000-memory.dmp

    Filesize

    320KB

  • memory/2556-142-0x000000001E110000-0x000000001E1C2000-memory.dmp

    Filesize

    712KB

  • memory/2556-143-0x00007FFE1C5A0000-0x00007FFE1D061000-memory.dmp

    Filesize

    10.8MB

  • memory/4656-132-0x0000000000F60000-0x0000000000FE4000-memory.dmp

    Filesize

    528KB

  • memory/4656-133-0x00007FFE1C5A0000-0x00007FFE1D061000-memory.dmp

    Filesize

    10.8MB

  • memory/4656-138-0x00007FFE1C5A0000-0x00007FFE1D061000-memory.dmp

    Filesize

    10.8MB