Overview

overview

10

Static

static

10

a2b83ca280...3c.exe

windows7-x64

10

a2b83ca280...3c.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    146s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2024 02:47

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General

  • Target

    a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe

  • Size

    45KB

  • MD5

    66e220b33b24bec99a124bf81f5cbee1

  • SHA1

    147c16eb7bdf357f5061d2acb28736c5d49a0bdb

  • SHA256

    a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

  • SHA512

    30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

  • SSDEEP

    768:5uiGNTdFHLBWUZiGrmo2qrrKjGKG6PIyzjbFgX3iFV7wtzuQ66cB2bkBDZyu:5uiGNTdBR2mKYDy3bCXSX7wtzuQMySd7

Score
10/10
asyncratdiscoveryrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/bHKKgu6n

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • 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
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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
    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\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe
    "C:\Users\Admin\AppData\Local\Temp\a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3940
    • C:\Windows\SysWOW64\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⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3900
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4140
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC043.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4872
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1012
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:5076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpC043.tmp.bat
    Filesize

    151B

    MD5

    07a81fc96bf6c31237fb08423a05e8e6

    SHA1

    d9e746f20266795fef0c3a03378f787a187554bc

    SHA256

    a261db0c2cd4cf919a7ae707bd33fbc4e230ca2342f713e41318feadce60443b

    SHA512

    03201be633b4b3da164b6d610434f67159954b5adf69c9fdb2ab38c2da4540ea10bcc6a040f52cea5f9123c9e55fb4f9743fbd283f26682c236ba431913e04c9

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

    45KB

    MD5

    66e220b33b24bec99a124bf81f5cbee1

    SHA1

    147c16eb7bdf357f5061d2acb28736c5d49a0bdb

    SHA256

    a2b83ca2802947ffbb1b191ee1b8326d4dcbac5f4d99bbb25ba816717b50fa3c

    SHA512

    30d753a3fe53a4db078d6479ad16f72de80a17835c30f6269edb184f40542826e4da302be370754adeb51c47e242e1f02583a327f7b7493c6c2aa8e7069eb1c3

    Download Submit

  • memory/3940-0-0x00000000749CE000-0x00000000749CF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3940-1-0x0000000000280000-0x0000000000292000-memory.dmp

    Filesize

    72KB

    Download

  • memory/3940-2-0x00000000749C0000-0x0000000075170000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/3940-3-0x0000000004C60000-0x0000000004CFC000-memory.dmp

    Filesize

    624KB

    Download

  • memory/3940-9-0x00000000749C0000-0x0000000075170000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/5076-13-0x0000000074920000-0x00000000750D0000-memory.dmp

    Filesize

    7.7MB

    Download

  • memory/5076-14-0x0000000074920000-0x00000000750D0000-memory.dmp

    Filesize

    7.7MB

    Download