Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 5 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 46 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 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 28 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⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4908
    • C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe
      "C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdate.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1892
      • 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:3672
    • 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:2868
      • 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:4504
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2664
        • 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:3948
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2740
      • 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:1272
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3268
        • 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:2848
  • C:\ProgramData\MicrosoftEdgeUpdate.exe
    C:\ProgramData\MicrosoftEdgeUpdate.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4512
  • C:\ProgramData\MicrosoftEdgeUpdate.exe
    C:\ProgramData\MicrosoftEdgeUpdate.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1828
  • C:\ProgramData\MicrosoftEdgeUpdate.exe
    C:\ProgramData\MicrosoftEdgeUpdate.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\48fc5197e2f4f4ede7a9e52c81d7baf7\Admin@KZYBFHMK_en-US\Browsers\Firefox\Bookmarks.txt

    Filesize

    105B

    MD5

    2e9d094dda5cdc3ce6519f75943a4ff4

    SHA1

    5d989b4ac8b699781681fe75ed9ef98191a5096c

    SHA256

    c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

    SHA512

    d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

  • C:\Users\Admin\AppData\Local\48fc5197e2f4f4ede7a9e52c81d7baf7\Admin@KZYBFHMK_en-US\System\Process.txt

    Filesize

    4KB

    MD5

    ebd891c4e78bba5cf03eb891cd7f0aac

    SHA1

    f2ee29fabd35c2adb8c4f7f813aa6ca286a47a7c

    SHA256

    9e44b1416f012751503183b4241c3c1d52bd38bf212543cd732e05c1c8946cd8

    SHA512

    d8a78520097d018b9f7562f91396e49e80ae9d4bf19109d8088b19b03ae4e3a659fe2992bc957a67e6033f59d9a1373f1cc07660af9cd5c40ba0094ec12f79e3

  • C:\Users\Admin\AppData\Local\48fc5197e2f4f4ede7a9e52c81d7baf7\msgid.dat

    Filesize

    5B

    MD5

    6da62b74e73f5aa77a83289bda6770b2

    SHA1

    3e0d31cc0b03d2cd2820fec495321044f1af07d5

    SHA256

    c3f699d4a1feb55ab7bbb3a59a0cea97d5c50a736a6175b25edca2d6cfc84ba5

    SHA512

    0a5a23ec1095a6a1cfc16b5b5d44b101544c3479b48b9a5f4dac5b585dc86880414fa287f2b4f3a67ac6741e1e64ced955008d0159ad2f293d6e2f22a2192d6a

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

    Filesize

    86KB

    MD5

    51cdbf80fae38e82aa1c6ac3c86081a8

    SHA1

    b4a00a40555f6d7655a80ef0aaab920c35994743

    SHA256

    70e63eb524c1d6dbe4f4fa276d3f4d2756108cb5a4f4ebb9a6264fcbd5d4a73b

    SHA512

    aa69c54770a36eba26b1408aaf0338975b4bd1b3dd118de71d81882671c86fc6b0c80567c67ffb6cd3c1a3f98ac02fe6ac5d9495a03531bcff1ecc61574c85e1

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MicrosoftEdgeUpdate.exe.log

    Filesize

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

    Filesize

    225KB

    MD5

    8008775094d446eaed43a423cd8a26f9

    SHA1

    4b8ef16e4a70fed23dc20cc5e27566df1e06af04

    SHA256

    48a06f8dbe0c56894b38bb3489c8ed5243d246328c512ee265bc31de441b5e1f

    SHA512

    6d9f2dca0d9032702971b339b7df65efab1c95d76e89044cf36ed43ef3116d21d1203d1561bd5fb4bd838d4df3dfbd240e2c89b715400f7a89037a3757326792

  • memory/1892-26-0x00007FFD85C80000-0x00007FFD86741000-memory.dmp

    Filesize

    10.8MB

  • memory/1892-118-0x00007FFD85C80000-0x00007FFD86741000-memory.dmp

    Filesize

    10.8MB

  • memory/1892-21-0x00000000004F0000-0x000000000050C000-memory.dmp

    Filesize

    112KB

  • memory/1892-34-0x000000001B2A0000-0x000000001B2B0000-memory.dmp

    Filesize

    64KB

  • memory/1892-190-0x000000001B2A0000-0x000000001B2B0000-memory.dmp

    Filesize

    64KB

  • memory/2868-189-0x00000000062D0000-0x00000000062DA000-memory.dmp

    Filesize

    40KB

  • memory/2868-139-0x00000000752CE000-0x00000000752CF000-memory.dmp

    Filesize

    4KB

  • memory/2868-184-0x00000000062E0000-0x0000000006372000-memory.dmp

    Filesize

    584KB

  • memory/2868-185-0x0000000006930000-0x0000000006ED4000-memory.dmp

    Filesize

    5.6MB

  • memory/2868-28-0x0000000000810000-0x000000000084E000-memory.dmp

    Filesize

    248KB

  • memory/2868-27-0x00000000752CE000-0x00000000752CF000-memory.dmp

    Filesize

    4KB

  • memory/2868-29-0x0000000005710000-0x0000000005776000-memory.dmp

    Filesize

    408KB

  • memory/2868-196-0x0000000006900000-0x0000000006912000-memory.dmp

    Filesize

    72KB

  • memory/4908-0-0x00007FFD85C83000-0x00007FFD85C85000-memory.dmp

    Filesize

    8KB

  • memory/4908-1-0x0000000000E70000-0x0000000000ED2000-memory.dmp

    Filesize

    392KB