Overview

overview

10

Static

static

10

RuntimeBroker.exe

windows7-x64

10

RuntimeBroker.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    132s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2025, 21:20

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General

  • Target

    RuntimeBroker.exe

  • Size

    45KB

  • MD5

    7a984e3a8ef99e429ceef1f1ddc144f4

  • SHA1

    581dd32af3c53b1dc7b8a95aa2805ee0e8f44190

  • SHA256

    4d8c876b969caf2449f169f89ec257f5e1412e23b609ab4f7c7ee72cd4b0de60

  • SHA512

    b078b827e49cddfd743dd55802c0a48dc5056ccb172cb83a65e484a26c62fa30e1fa6860621752d4adbad3e5d234d759c817a0c0b3532531a99f50f05622bf6a

  • SSDEEP

    768:ruGr1TVhfPNWUtWuHmo2qzVh7N78wJuPIozjbNVgXKDi4Rj6nKBDZjx:ruGr1TVxx2GFN4iXo3bsXjCj6nUdjx

Score
10/10
asyncratdefaultdiscoveryrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

holefo2785-22820.portmap.host:22820

holefo2785-22820.portmap.host:6606
Mutex

I674w9YbNo4n

Attributes
  • delay

    3

  • install

    true

  • install_file

    RuntimeBroker.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Async RAT payload 1 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Delays execution with timeout.exe 1 IoCs
    defense_evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5552
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4536
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "RuntimeBroker" /tr '"C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4912
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9422.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4620
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4652
      • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
        "C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1188

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RuntimeBroker.exe.log
    Filesize

    522B

    MD5

    acc9090417037dfa2a55b46ed86e32b8

    SHA1

    53fa6fb25fb3e88c24d2027aca6ae492b2800a4d

    SHA256

    2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b

    SHA512

    d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\tmp9422.tmp.bat
    Filesize

    157B

    MD5

    d5bbe5e2955e0efea3f8dfcb9534c439

    SHA1

    c717e9fe3939b21a8dd4e8ff72a35285b24cf9f7

    SHA256

    bc47fce0a081dd42d79590054c00d467db49984e032cdbef23f4188509bd7fb9

    SHA512

    337a3c38e6fff060a5de636db54f15905d35ab8bdb06b573fdf99a91b14d8b52fe2731a16df5158c5eac341531da54fd8b9490aeacab81e62acf6e6b6f7bf8e1

    Download Submit

  • C:\Users\Admin\AppData\Roaming\RuntimeBroker.exe
    Filesize

    45KB

    MD5

    7a984e3a8ef99e429ceef1f1ddc144f4

    SHA1

    581dd32af3c53b1dc7b8a95aa2805ee0e8f44190

    SHA256

    4d8c876b969caf2449f169f89ec257f5e1412e23b609ab4f7c7ee72cd4b0de60

    SHA512

    b078b827e49cddfd743dd55802c0a48dc5056ccb172cb83a65e484a26c62fa30e1fa6860621752d4adbad3e5d234d759c817a0c0b3532531a99f50f05622bf6a

    Download Submit

  • memory/1188-12-0x0000000074C60000-0x0000000075410000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/1188-13-0x0000000074C60000-0x0000000075410000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/5552-0-0x0000000074CFE000-0x0000000074CFF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/5552-1-0x0000000000730000-0x0000000000742000-memory.dmp

    Filesize

    72KB

    Download

  • memory/5552-2-0x00000000058A0000-0x000000000593C000-memory.dmp

    Filesize

    624KB

    Download