Overview

overview

10

Static

static

10

1660-55-0x...ry.exe

windows7_x64

10

1660-55-0x...ry.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    01-07-2022 22:35

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General

  • Target

    1660-55-0x0000000000380000-0x0000000000392000-memory.exe

  • Size

    72KB

  • MD5

    9200c5f208c0740d4dcf96b1674d383e

  • SHA1

    e26e185b70b71f2b320ba466f1e0a775d961ef61

  • SHA256

    bed77ad87299dad74adb4da37fb2b8f6e082ce15aa5eab42e560453060c3375b

  • SHA512

    276d12bbf5847ea59766ca1a92a856e441cb7e7dcd0eeaa4ec2db5f596daaf9e1d89d6047a7dafcc7aa4efa48bc05af4ae1aba4b7f024ec8732d3a650029a396

Score
10/10
asyncratdefaultratsuricata

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

milla.publicvm.com:6606

milla.publicvm.com:7707

milla.publicvm.com:8808
Mutex

ncwfisdaribhhybik

Attributes
  • delay

    10

  • install

    true

  • install_file

    syastem.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

    suricata: ET MALWARE Generic AsyncRAT Style SSL Cert

    suricata
  • suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    suricata
  • Async RAT payload 3 IoCs
    rat
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • 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 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1660-55-0x0000000000380000-0x0000000000392000-memory.exe
    "C:\Users\Admin\AppData\Local\Temp\1660-55-0x0000000000380000-0x0000000000392000-memory.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn 1660-55-0x0000000000380000-0x0000000000392000-memory /tr '"C:\Users\Admin\AppData\Roaming\syastem.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3188
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /ru system /rl highest /tn 1660-55-0x0000000000380000-0x0000000000392000-memory /tr '"C:\Users\Admin\AppData\Roaming\syastem.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4896
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85EE.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3832
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:548
      • C:\Users\Admin\AppData\Roaming\syastem.exe
        "C:\Users\Admin\AppData\Roaming\syastem.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:5044

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

1
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\tmp85EE.tmp.bat
    Filesize

    151B

    MD5

    7667fb0cfb2c0815adfd39a8fdcbfec3

    SHA1

    b127057c4cac6d8285b69e3f82b42a516bc86bb5

    SHA256

    0d2f3991e9fa9fdce0f19d8ff92927703e83b198a498ae03ce26f231d4bddff2

    SHA512

    061dc0fe3b82582510252f9a2c91c85fb164ff3e94395193af481cfca0c739558fae8e823e979f882ea6af348f4108082821d83f0b1bb07c58a208663392e0f7

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

    72KB

    MD5

    9200c5f208c0740d4dcf96b1674d383e

    SHA1

    e26e185b70b71f2b320ba466f1e0a775d961ef61

    SHA256

    bed77ad87299dad74adb4da37fb2b8f6e082ce15aa5eab42e560453060c3375b

    SHA512

    276d12bbf5847ea59766ca1a92a856e441cb7e7dcd0eeaa4ec2db5f596daaf9e1d89d6047a7dafcc7aa4efa48bc05af4ae1aba4b7f024ec8732d3a650029a396

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

    72KB

    MD5

    9200c5f208c0740d4dcf96b1674d383e

    SHA1

    e26e185b70b71f2b320ba466f1e0a775d961ef61

    SHA256

    bed77ad87299dad74adb4da37fb2b8f6e082ce15aa5eab42e560453060c3375b

    SHA512

    276d12bbf5847ea59766ca1a92a856e441cb7e7dcd0eeaa4ec2db5f596daaf9e1d89d6047a7dafcc7aa4efa48bc05af4ae1aba4b7f024ec8732d3a650029a396

    Download Submit
  • memory/548-138-0x0000000000000000-mapping.dmp
    Download
  • memory/1944-131-0x00007FFAB78F0000-0x00007FFAB83B1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/1944-132-0x00007FFAB78F0000-0x00007FFAB83B1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/1944-130-0x0000000000F60000-0x0000000000F72000-memory.dmp
    Filesize

    72KB

    Download
  • memory/1944-136-0x00007FFAB78F0000-0x00007FFAB83B1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/3188-133-0x0000000000000000-mapping.dmp
    Download
  • memory/3832-134-0x0000000000000000-mapping.dmp
    Download
  • memory/4896-135-0x0000000000000000-mapping.dmp
    Download
  • memory/5044-139-0x0000000000000000-mapping.dmp
    Download
  • memory/5044-142-0x00007FFAB78F0000-0x00007FFAB83B1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/5044-143-0x00007FFAB78F0000-0x00007FFAB83B1000-memory.dmp
    Filesize

    10.8MB

    Download