Overview

overview

10

Static

static

10

RuntimeBroker.exe

windows7-x64

10

RuntimeBroker.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    103s
  • max time network
    134s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-05-2023 00:05

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General

  • Target

    RuntimeBroker.exe

  • Size

    63KB

  • MD5

    251e7183331025aac57c3965ca6bdb3b

  • SHA1

    b7d7e6f953bf378dae8d9f666369d8e60e405e95

  • SHA256

    ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

  • SHA512

    0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453

  • SSDEEP

    768:+uw6LVcsTPq781wC8A+XjGDp4b+tlbBH11+T4pSBGHmDbDG5phQWoXeYQTJKZGSv:PeQPcmlTOYUbch05qKxulkpqKmY7

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

udmansoud-59712.portmap.host:59712

Mutex

ikU2zF吉诶T8تXω比9ΖNIר

Attributes
  • delay

    1

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 3 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
    "C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3700
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4508
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:3124
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6EDC.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4608
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3436
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4280

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6EDC.tmp.bat
    Filesize

    151B

    MD5

    a86fca233d738f9e04500f43493fd016

    SHA1

    149bb3a19c9225c051588108e46d62e1903d612f

    SHA256

    6ebaf5daf9d292f7754e9ecee79fcf8a469fc2307521f5af899837f9fa7fda25

    SHA512

    c27d86abbf9e0143da94ec48a8c8eeffa70830c16b100ff0cc30e9dd45ac0fd8b3ddc7b1892091c774ec5741100eaccafdd07d5e307ac13040ca40e641404ea8

    Download Submit
  • C:\Users\Admin\AppData\Roaming\svchost.exe
    Filesize

    63KB

    MD5

    251e7183331025aac57c3965ca6bdb3b

    SHA1

    b7d7e6f953bf378dae8d9f666369d8e60e405e95

    SHA256

    ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

    SHA512

    0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453

    Download Submit
  • C:\Users\Admin\AppData\Roaming\svchost.exe
    Filesize

    63KB

    MD5

    251e7183331025aac57c3965ca6bdb3b

    SHA1

    b7d7e6f953bf378dae8d9f666369d8e60e405e95

    SHA256

    ae799c3696cadbbe3a8d2036f67685e01f385f214f47b0c7d094a15159688e71

    SHA512

    0209d2916ec0a1c67043e04c2c4ce9a3b6401d437791581887fe3ba17f2eefdec35fe2adc79704868a1750977f0b9fb7a29c3fe68d4df9b5a494988757e1b453

    Download Submit
  • memory/3700-133-0x00000000003F0000-0x0000000000406000-memory.dmp
    Filesize

    88KB

    Download