Overview

overview

10

Static

static

10

AsyncClient.exe

windows7-x64

10

AsyncClient.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-06-2023 14:40

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General

  • Target

    AsyncClient.exe

  • Size

    45KB

  • MD5

    d804dbbb439098de1ef46b54b69519d8

  • SHA1

    349a6c7e516dd41f2e164d305ca9168bef949072

  • SHA256

    6a08cf2d6510da2ac1d951be0fd0d0796dc5c04d4e42727924ecef10b6115125

  • SHA512

    d238601108a7ce8373ab1dcb611b67f729b7968853ab9fbd0cc85615c25dc6bb665ec1044fdef217ada5d8fb3422b1f021727d2759f7f385386d296d06de87ec

  • SSDEEP

    768:7u1a21T3EiJfWUzuydmo2qzDKjGKG6PIyzjbFgX3iFt4k24EfYDJfp4XIlAKKyBv:7u1a21T3xN2SKYDy3bCXSIQ8YDJfpNdF

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:23092

195.78.54.247:23092
Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    awdawd.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).

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • 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 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:404
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "awdawd" /tr '"C:\Users\Admin\AppData\Roaming\awdawd.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2140
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "awdawd" /tr '"C:\Users\Admin\AppData\Roaming\awdawd.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1004
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8012.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:236
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1296
      • C:\Users\Admin\AppData\Roaming\awdawd.exe
        "C:\Users\Admin\AppData\Roaming\awdawd.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4632
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4168

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

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp8012.tmp.bat
    Filesize

    150B

    MD5

    2b680b675a3a0d5c5b71e30e3970ea35

    SHA1

    9e6178cda980ad5284162920178276194a064b5e

    SHA256

    e6f353a5f3df0319edc1c366b45199f75999ba2f6d1295057909eb380cebbc97

    SHA512

    dadaddfc84a052319c71cf4e6ec343a4a32bc849b5a03d70a8298bfac1a808257e36110825221dcc457659634d71083bd5f3a609ca7df7cb56069dbcd6585be0

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

    45KB

    MD5

    d804dbbb439098de1ef46b54b69519d8

    SHA1

    349a6c7e516dd41f2e164d305ca9168bef949072

    SHA256

    6a08cf2d6510da2ac1d951be0fd0d0796dc5c04d4e42727924ecef10b6115125

    SHA512

    d238601108a7ce8373ab1dcb611b67f729b7968853ab9fbd0cc85615c25dc6bb665ec1044fdef217ada5d8fb3422b1f021727d2759f7f385386d296d06de87ec

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

    45KB

    MD5

    d804dbbb439098de1ef46b54b69519d8

    SHA1

    349a6c7e516dd41f2e164d305ca9168bef949072

    SHA256

    6a08cf2d6510da2ac1d951be0fd0d0796dc5c04d4e42727924ecef10b6115125

    SHA512

    d238601108a7ce8373ab1dcb611b67f729b7968853ab9fbd0cc85615c25dc6bb665ec1044fdef217ada5d8fb3422b1f021727d2759f7f385386d296d06de87ec

    Download Submit
  • memory/404-147-0x0000000002AB0000-0x0000000002AC0000-memory.dmp
    Filesize

    64KB

    Download
  • memory/404-133-0x00000000005F0000-0x0000000000602000-memory.dmp
    Filesize

    72KB

    Download
  • memory/404-148-0x0000000005120000-0x00000000051BC000-memory.dmp
    Filesize

    624KB

    Download
  • memory/4168-140-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-143-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-144-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-145-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-146-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-142-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-141-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-136-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-134-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4168-135-0x0000024FF1CD0000-0x0000024FF1CD1000-memory.dmp
    Filesize

    4KB

    Download
  • memory/4632-157-0x0000000004E40000-0x0000000004E50000-memory.dmp
    Filesize

    64KB

    Download
  • memory/4632-158-0x0000000004E40000-0x0000000004E50000-memory.dmp
    Filesize

    64KB

    Download