Analysis

  • max time kernel
    16s
  • max time network
    17s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-11-2024 17:54

General

  • Target

    EXMservice.exe

  • Size

    12.0MB

  • MD5

    aab9c36b98e2aeff996b3b38db070527

  • SHA1

    4c2910e1e9b643f16269a2e59e3ada80fa70e5fa

  • SHA256

    c148cc14f15b71a2d3f5e6bce6b706744f6b373a7e6c090c14f46f81d2d6e82f

  • SHA512

    0db75756a041a7cda6b384718581aaf11e6873614465dd56e81f17ad171cffe380e288a3c2ee540222190392904921f26df8a1d66d4108051c60fc8e5b2df779

  • SSDEEP

    6144:tgIFnaVf5qSsmMLN6+kjn7nPZDt7FY7n16EUkKUBnf6R3Xnd:4fA5y7PhNi71PfKUV6R3X

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    USB.exe

  • pastebin_url

    https://pastebin.com/raw/ZnhxAV6a

  • telegram

    https://api.telegram.org/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888

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/bot7538644364:AAHEMV7mmxz6PSRgzo0ORf3_n0BaazmrAqk/sendMessage?chat_id=7541917888

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#.

  • Asyncrat family
  • Detect Xworm Payload 2 IoCs
  • StormKitty

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

  • StormKitty payload 2 IoCs
  • Stormkitty family
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Async RAT payload 1 IoCs
  • 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 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Drops desktop.ini file(s) 7 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • 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 SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI 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: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 59 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of FindShellTrayWindow 39 IoCs
  • Suspicious use of SendNotifyMessage 38 IoCs
  • Suspicious use of SetWindowsHookEx 1 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:4696
    • C:\Users\Admin\msedge.exe
      "C:\Users\Admin\msedge.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2608
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "msedge" /tr "C:\Users\Admin\AppData\Local\msedge.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3788
    • C:\Users\Admin\svchost.exe
      "C:\Users\Admin\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1888
      • 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:3208
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3616
        • 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:2564
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3020
      • 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:244
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:2124
        • 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:1980
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\861cbad1abe83401510809554dc4d600\Admin@ZTSLLRFH_en-US\System\Process.txt

    Filesize

    4KB

    MD5

    58942ac5e9325d3fc0d4e62b4e906978

    SHA1

    d4f2eaa3f324c43da6496ec2186c03e0843fa733

    SHA256

    c77efa8a217ea9d3af1afc5a06ab7f6ef9a390127ca4a6998b5bab0c809283b8

    SHA512

    b6abce0128fe9feb3ec60c5373e3e0774c54a670f6b02206c47fe3c93a85403fec52f4d7399834663a81e0d2ff6ae9c3a6cbdffa109a8d136630c250c1f3a0b1

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedge.lnk

    Filesize

    961B

    MD5

    10ea7d80cca17c7fac2c12e8a4bee45d

    SHA1

    32a25b0fc574f5cfe2980a964a6ab6e3c94bf8be

    SHA256

    086c1c5a20e08ef7d74cc9f81d9b39db3f3b54cf3a44972f76a7045ec9e129e6

    SHA512

    dc46925e70638cad1e40b1956e2ba8bf834040f7bc252785b760bd2ffd9d80348a01e8a255fd198c0717b3886c92800e140d83d5a963fc80ea350ba3fc9bf8e2

  • C:\Users\Admin\msedge.exe

    Filesize

    146KB

    MD5

    f1c2525da4f545e783535c2875962c13

    SHA1

    92bf515741775fac22690efc0e400f6997eba735

    SHA256

    9e6985fdb3bfa539f3d6d6fca9aaf18356c28a00604c4f961562c34fa9f11d0f

    SHA512

    56308ac106caa84798925661406a25047df8d90e4b65b587b261010293587938fa922fbb2cfdedfe71139e16bfcf38e54bb31cbcc00cd244db15d756459b6133

  • C:\Users\Admin\svchost.exe

    Filesize

    226KB

    MD5

    1bea6c3f126cf5446f134d0926705cee

    SHA1

    02c49933d0c2cc068402a93578d4768745490d58

    SHA256

    1d69b5b87c4cd1251c5c94461a455659febb683eab0ebd97dd30da2319ffc638

    SHA512

    eb9f423f6adb5e686a53f5f197e6b08455f8048d965a9ec850838fdf4724ef87f68945c435ace5a48a9a7226006a348e97586335d0246ea0dc898a412dea5df3

  • memory/1828-72-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-71-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-74-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-73-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-67-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-66-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-65-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-77-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-76-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1828-75-0x00000200C62C0000-0x00000200C62C1000-memory.dmp

    Filesize

    4KB

  • memory/1888-63-0x00000000750CE000-0x00000000750CF000-memory.dmp

    Filesize

    4KB

  • memory/1888-64-0x0000000000280000-0x00000000002BE000-memory.dmp

    Filesize

    248KB

  • memory/1888-78-0x0000000005190000-0x00000000051F6000-memory.dmp

    Filesize

    408KB

  • memory/1888-183-0x00000000750CE000-0x00000000750CF000-memory.dmp

    Filesize

    4KB

  • memory/1888-249-0x0000000005CE0000-0x0000000005D72000-memory.dmp

    Filesize

    584KB

  • memory/1888-250-0x0000000006330000-0x00000000068D4000-memory.dmp

    Filesize

    5.6MB

  • memory/1888-254-0x0000000005DF0000-0x0000000005DFA000-memory.dmp

    Filesize

    40KB

  • memory/2608-62-0x00007FFE59590000-0x00007FFE5A051000-memory.dmp

    Filesize

    10.8MB

  • memory/2608-175-0x00007FFE59590000-0x00007FFE5A051000-memory.dmp

    Filesize

    10.8MB

  • memory/2608-57-0x0000000000730000-0x000000000075A000-memory.dmp

    Filesize

    168KB

  • memory/2608-184-0x000000001B2C0000-0x000000001B2D0000-memory.dmp

    Filesize

    64KB

  • memory/4696-0-0x00007FFE59593000-0x00007FFE59595000-memory.dmp

    Filesize

    8KB

  • memory/4696-1-0x0000000000CE0000-0x0000000000D46000-memory.dmp

    Filesize

    408KB