Analysis

  • max time kernel
    26s
  • max time network
    24s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    18-08-2024 20:10

General

  • Target

    EXMservice.exe

  • Size

    12.0MB

  • MD5

    f189114f5f8504a1aeb97a90e71ea429

  • SHA1

    a2d029f042000b7e3ec175e1e365d9bf20396092

  • SHA256

    31709442f1ff903433dec01461829a0c05b62f0e7cab81f2efcd1a0b0845d748

  • SHA512

    5f939df2c5bc1f3c4f5b1fd835a7ab882d49fed5c5ebd7a41deba37b3f7ba423d194ccaad39aa3032d9454570d8863bdb93cca9c99ee12cf64dbc478b2dfcbbb

  • SSDEEP

    6144:pcBqNKm+UQqA9uAXTNpWKc9SNweSuRQjbvmpFETPMK3nYpbLYhZ+:pkCKm+UQqAP7WKc9SNavmpOTZ3WuM

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %ProgramData%

  • install_file

    MicrosoftEdgeUpdate.exe

  • pastebin_url

    https://pastebin.com/raw/ZnhxAV6a

  • telegram

    https://api.telegram.org/bot6701075763:AAGkvv2CpqBxGihH8FtOkSA7Uxy35GZpAFI/sendMessage?chat_id=5991331733

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

https://api.telegram.org/bot6701075763:AAGkvv2CpqBxGihH8FtOkSA7Uxy35GZpAFI/sendMessage?chat_id=5991331733

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Detect Xworm Payload 2 IoCs
  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Async RAT payload 1 IoCs
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 8 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 6 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 33 IoCs
  • Suspicious use of SendNotifyMessage 33 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\EXMservice.exe
    "C:\Users\Admin\AppData\Local\Temp\EXMservice.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe
      "C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2740
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "MicrosoftEdgeUpdate" /tr "C:\ProgramData\MicrosoftEdgeUpdate.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2596
    • C:\Users\Admin\AppData\Local\svchost.exe
      "C:\Users\Admin\AppData\Local\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • System Location Discovery: System Language Discovery
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Wi-Fi Discovery
        • Suspicious use of WriteProcessMemory
        PID:2472
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:1716
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Wi-Fi Discovery
          PID:2792
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2620
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2204
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2392
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show networks mode=bssid
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          PID:1952
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:2176

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\77d797937be170f4134f0be96dd6856c\msgid.dat

    Filesize

    1B

    MD5

    cfcd208495d565ef66e7dff9f98764da

    SHA1

    b6589fc6ab0dc82cf12099d1c2d40ab994e8410c

    SHA256

    5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9

    SHA512

    31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

  • C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe

    Filesize

    86KB

    MD5

    51cdbf80fae38e82aa1c6ac3c86081a8

    SHA1

    b4a00a40555f6d7655a80ef0aaab920c35994743

    SHA256

    70e63eb524c1d6dbe4f4fa276d3f4d2756108cb5a4f4ebb9a6264fcbd5d4a73b

    SHA512

    aa69c54770a36eba26b1408aaf0338975b4bd1b3dd118de71d81882671c86fc6b0c80567c67ffb6cd3c1a3f98ac02fe6ac5d9495a03531bcff1ecc61574c85e1

  • C:\Users\Admin\AppData\Local\svchost.exe

    Filesize

    225KB

    MD5

    8008775094d446eaed43a423cd8a26f9

    SHA1

    4b8ef16e4a70fed23dc20cc5e27566df1e06af04

    SHA256

    48a06f8dbe0c56894b38bb3489c8ed5243d246328c512ee265bc31de441b5e1f

    SHA512

    6d9f2dca0d9032702971b339b7df65efab1c95d76e89044cf36ed43ef3116d21d1203d1561bd5fb4bd838d4df3dfbd240e2c89b715400f7a89037a3757326792

  • memory/2176-99-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

  • memory/2176-100-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

  • memory/2416-0-0x000007FEF5823000-0x000007FEF5824000-memory.dmp

    Filesize

    4KB

  • memory/2416-1-0x0000000000800000-0x0000000000862000-memory.dmp

    Filesize

    392KB

  • memory/2660-14-0x0000000000B50000-0x0000000000B8E000-memory.dmp

    Filesize

    248KB

  • memory/2740-12-0x0000000000E30000-0x0000000000E4C000-memory.dmp

    Filesize

    112KB

  • memory/2740-15-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

    Filesize

    9.9MB

  • memory/2740-93-0x000007FEF5820000-0x000007FEF620C000-memory.dmp

    Filesize

    9.9MB