Analysis

  • max time kernel
    137s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/12/2024, 02:21

General

  • Target
    2024-12-03_0aa9dc10bf05ec4c4d4b9baa5cbb6f1f_ismagent_ryuk_sliver.exe
  • Size 2.9MB
  • Sample241203-cs4mysvnbz
  • SHA256 cfc9778f772c8c8daa33a520e3adbfa7fad6b33ee0d5dd104f5580eaf52eed82
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • meshagent

Version
  • 2

Botnet
  • test

C2
  • http://heimdall.hostedhero.com:443/agent.ashx

Attributes
  • mesh_id

    0x4E4070D78AFFA88AFDD57BD66456CDBE2034549498474E2723BF29A67E0608F067A66207C3C42FCD04E348988CD8E892

  • server_id

    316B450D4320A8D7AF354D9F06DF347C98693E4AA9014FC7CFEF9940F3F338B0853FADD2076DF2D06D5810331C87BF50

  • wss

    wss://heimdall.hostedhero.com:443/agent.ashx

Signatures

  • Detects MeshAgent payload 1 IoCs
  • MeshAgent

    MeshAgent is an open source remote access trojan written in C++.

  • Meshagent family
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-12-03_0aa9dc10bf05ec4c4d4b9baa5cbb6f1f_ismagent_ryuk_sliver.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-03_0aa9dc10bf05ec4c4d4b9baa5cbb6f1f_ismagent_ryuk_sliver.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3028
    • C:\Windows\system32\wbem\wmic.exe
      wmic os get oslanguage /FORMAT:LIST
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1652
    • C:\Users\Admin\AppData\Local\Temp\2024-12-03_0aa9dc10bf05ec4c4d4b9baa5cbb6f1f_ismagent_ryuk_sliver.exe
      "C:\Users\Admin\AppData\Local\Temp\2024-12-03_0aa9dc10bf05ec4c4d4b9baa5cbb6f1f_ismagent_ryuk_sliver.exe" -fullinstall
      2⤵
      • Sets service image path in registry
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1928
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "Get-Module -ListAvailable -Name netsecurity"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3328
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "New-NetFirewallRule -Action Allow -Description \"Mesh Central Agent Management Traffic\" -Direction Inbound -DisplayName \"Mesh Agent Management Traffic (TCP-1)\" -DynamicTarget Any -EdgeTraversalPolicy Allow -Enabled True -InterfaceType Any -LocalPort 16990 -Profile \"Public, Private, Domain\" -Program \"C:\Program Files\Mesh Agent\MeshAgent.exe\" -Protocol TCP"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4552
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "New-NetFirewallRule -Action Allow -Description \"Mesh Central Agent Management Traffic\" -Direction Inbound -DisplayName \"Mesh Agent Management Traffic (TCP-2)\" -DynamicTarget Any -EdgeTraversalPolicy Allow -Enabled True -InterfaceType Any -LocalPort 16991 -Profile \"Public, Private, Domain\" -Program \"C:\Program Files\Mesh Agent\MeshAgent.exe\" -Protocol TCP"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1708
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "New-NetFirewallRule -Action Allow -Description \"Mesh Central Agent Peer-to-Peer Traffic\" -Direction Inbound -DisplayName \"Mesh Agent Peer-to-Peer Traffic (UDP-1)\" -DynamicTarget Any -EdgeTraversalPolicy Allow -Enabled True -InterfaceType Any -LocalPort 16990 -Profile \"Public, Private, Domain\" -Program \"C:\Program Files\Mesh Agent\MeshAgent.exe\" -Protocol UDP"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4620
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "New-NetFirewallRule -Action Allow -Description \"Mesh Central Agent Peer-to-Peer Traffic\" -Direction Inbound -DisplayName \"Mesh Agent Peer-to-Peer Traffic (UDP-2)\" -DynamicTarget Any -EdgeTraversalPolicy Allow -Enabled True -InterfaceType Any -LocalPort 16991 -Profile \"Public, Private, Domain\" -Program \"C:\Program Files\Mesh Agent\MeshAgent.exe\" -Protocol UDP"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:744
  • C:\Program Files\Mesh Agent\MeshAgent.exe
    "C:\Program Files\Mesh Agent\MeshAgent.exe" --installedByUser="S-1-5-21-3756129449-3121373848-4276368241-1000"
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies data under HKEY_USERS
    PID:4044

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        MeshAgent.exe

        • Path C:\Program Files\Mesh Agent\MeshAgent.exe
        • Size 2.9MB
        • SHA256 cfc9778f772c8c8daa33a520e3adbfa7fad6b33ee0d5dd104f5580eaf52eed82
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 3KB
        • SHA256 451cd58d101dc6219943589eedc0789ff95f35be417f63555ebde5d354e7c11a
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 64B
        • SHA256 6dbd177f5aa34f836bf52885c04a3a93771384ebad954911be812c039290bcad
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 b11437cfbe0773154d082440842d8754f31a0ff920b86a1c518cefbe9e0bc92e
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 1a7c732a8de0ff074315b342a3f2937039b493ecbf287773905aa7fb1d80798e
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 c08e83ffcff75d0e851db0959e4c0be99ff92703a7cf79a797114e2a4505f1a6
        • MD5 SHA1 SHA512

        __PSScriptPolicyTest_lewlvqqu.fbg.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lewlvqqu.fbg.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        memory/3328-5-0x0000029362170000-0x0000029362192000-memory.dmp

        memory/3328-21-0x00000293622E0000-0x00000293622EE000-memory.dmp

        memory/3328-22-0x000002937CB80000-0x000002937CB9A000-memory.dmp