Overview

overview

10

Static

static

SKM_C25820...57.exe

windows7_x64

10

SKM_C25820...57.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    22-12-2020 10:33

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General

  • Target

    SKM_C258201001130020005057.exe

  • Size

    757KB

  • MD5

    14592d68532406530e07a1027e89b14f

  • SHA1

    f58566c500070cd8878c45885bbb0ca5e36e79f1

  • SHA256

    383536471e06eef80e55ff074d896710948eb79d3f90b734b4d32e0876faa79c

  • SHA512

    bc2728c1f172576b3a17b751363c7f333914a39cbc274bbb8d62938791f7f522d3b341c433d444e1e385b126ec51b846f413d146dd46f157b2e08a8455a73bd4

Score
10/10
asyncratpersistencerat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

severdops.ddns.net:6204

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • aes_key

    9csne4PXNqdF9ZKg3xLERR6lPdrhEK0H

  • anti_detection

    false

  • autorun

    false

  • bdos

    false

  • delay

    Default

  • host

    severdops.ddns.net

  • hwid

    3

  • install_file

  • install_folder

    %AppData%

  • mutex

    AsyncMutex_6SI8OkPnk

  • pastebin_config

    null

  • port

    6204

  • version

    0.5.7B

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Async RAT payload 4 IoCs
    rat
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
    "C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
      "C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
      2⤵
        PID:1636
      • C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe
        "C:\Users\Admin\AppData\Local\Temp\SKM_C258201001130020005057.exe"
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1596

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    2
    T1112

    Credential Access

    Discovery

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • memory/1080-2-0x0000000074CF0000-0x00000000753DE000-memory.dmp
      Filesize

      6.9MB

      Download
    • memory/1080-3-0x00000000010B0000-0x00000000010B1000-memory.dmp
      Filesize

      4KB

      Download
    • memory/1080-5-0x00000000005F0000-0x000000000060D000-memory.dmp
      Filesize

      116KB

      Download
    • memory/1596-6-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

      Download
    • memory/1596-7-0x000000000040C71E-mapping.dmp
      Download
    • memory/1596-8-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

      Download
    • memory/1596-9-0x0000000000400000-0x0000000000412000-memory.dmp
      Filesize

      72KB

      Download
    • memory/1596-10-0x0000000074C70000-0x000000007535E000-memory.dmp
      Filesize

      6.9MB

      Download