Overview

overview

10

Static

static

3

fa81aab0bc...18.exe

windows7-x64

10

fa81aab0bc...18.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-04-2024 14:31

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General

  • Target

    fa81aab0bc348b79744852e65e2043df_JaffaCakes118.exe

  • Size

    1.1MB

  • MD5

    fa81aab0bc348b79744852e65e2043df

  • SHA1

    fa65b1b8b689a41822d84a588d17226ca233564c

  • SHA256

    1137a722df5bf7b96cdbf121282b328f429b895aa60f8a0caf120177303e1299

  • SHA512

    b01fd9cf2ae7964d4bead4197cf3bf8a77900ff7d2ce6fe9397a81e4a3988a88e9cc07fe121c696cc855a61944aac5e3b10289579307fd51006e324b2737b374

  • SSDEEP

    24576:NdeAPk5uFFgUBEGobZE1yeIeZPoVWwO2ha1:XeekuFFHEGobq1RJZPoVWdv

Score
10/10
asyncratdefaultevasionrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

51.143.89.185:8080

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    2e31a76-d46e-4625-bee5-4fb923fc49f5.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 2 IoCs
    rat
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion
  • 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
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fa81aab0bc348b79744852e65e2043df_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\fa81aab0bc348b79744852e65e2043df_JaffaCakes118.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks computer location settings
    • Identifies Wine through registry keys
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2568
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "2e31a76-d46e-4625-bee5-4fb923fc49f5" /tr '"C:\Users\Admin\AppData\Local\Temp\2e31a76-d46e-4625-bee5-4fb923fc49f5.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2016
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "2e31a76-d46e-4625-bee5-4fb923fc49f5" /tr '"C:\Users\Admin\AppData\Local\Temp\2e31a76-d46e-4625-bee5-4fb923fc49f5.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:3344

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Scheduled Task/Job

1
T1053

Privilege Escalation

Scheduled Task/Job

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • memory/2568-0-0x0000000000A70000-0x0000000000D00000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2568-2-0x0000000074850000-0x0000000075000000-memory.dmp
    Filesize

    7.7MB

    Download
  • memory/2568-1-0x0000000000A70000-0x0000000000D00000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2568-3-0x0000000000A70000-0x0000000000D00000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2568-4-0x0000000007390000-0x00000000073A0000-memory.dmp
    Filesize

    64KB

    Download
  • memory/2568-5-0x0000000007260000-0x00000000072FC000-memory.dmp
    Filesize

    624KB

    Download
  • memory/2568-8-0x0000000000A70000-0x0000000000D00000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2568-9-0x0000000074850000-0x0000000075000000-memory.dmp
    Filesize

    7.7MB

    Download
  • memory/2568-10-0x0000000007390000-0x00000000073A0000-memory.dmp
    Filesize

    64KB

    Download