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Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2025, 14:31

General

  • Target

    2025-01-28_8cd4a310e3c4f2ce52250eca4f2c630f_ismagent_ryuk_sliver.exe

  • Size

    2.9MB

  • MD5

    8cd4a310e3c4f2ce52250eca4f2c630f

  • SHA1

    2af4e53f40b5b28613d35c82b9768bc78d2fad56

  • SHA256

    aa89ac89659bffee9a9e8125f67df0c41ded196e282bcd9aa40bb703637a2527

  • SHA512

    3dcae80f39b429085d4b44aad6b3108e665a6d25e74694ef6730d171866abff60c55e7b4cb31f9520f8d825b041ddc7648aeac2977027bf4d4eb482567ef10d8

  • SSDEEP

    49152:kZFIlmhRYg1OziGQGRCv6da/KMvxZdAMBwQoxXXujOl4MPMFvfldPSFrXxn3l:jl7i86hR+fWMeP43l

Malware Config

Extracted

Family

meshagent

Version

2

Botnet

050 Lisboa - Zonesoft

C2

http://fs1.suporte.com.pt:8943/agent.ashx

Attributes
  • mesh_id

    0x313CE7C3BD97BA4DE25768478CFB01C142A538B329BAAB8F6B3AB4F4FFEEC83BF0EBE45A831A8A61950A237224143E83

  • server_id

    0481CF775C2137A6BF13FF516D4E688220F467FB031867C5FBA7771274EA8996A04DF952EDD29FAA3F8190D6B3985533

  • wss

    wss://fs1.suporte.com.pt:8943/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\2025-01-28_8cd4a310e3c4f2ce52250eca4f2c630f_ismagent_ryuk_sliver.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-28_8cd4a310e3c4f2ce52250eca4f2c630f_ismagent_ryuk_sliver.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:404
    • C:\Windows\system32\wbem\wmic.exe
      wmic os get oslanguage /FORMAT:LIST
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4868
    • C:\Users\Admin\AppData\Local\Temp\2025-01-28_8cd4a310e3c4f2ce52250eca4f2c630f_ismagent_ryuk_sliver.exe
      "C:\Users\Admin\AppData\Local\Temp\2025-01-28_8cd4a310e3c4f2ce52250eca4f2c630f_ismagent_ryuk_sliver.exe" -fullinstall
      2⤵
      • Sets service image path in registry
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2388
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        /C "Get-Module -ListAvailable -Name netsecurity"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1244
      • 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:2856
      • 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:632
      • 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:4372
      • 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:372
  • C:\Program Files\Mesh Agent\MeshAgent.exe
    "C:\Program Files\Mesh Agent\MeshAgent.exe" --installedByUser="S-1-5-21-4050598569-1597076380-177084960-1000"
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies data under HKEY_USERS
    PID:1400

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Program Files\Mesh Agent\MeshAgent.exe

    Filesize

    2.9MB

    MD5

    8cd4a310e3c4f2ce52250eca4f2c630f

    SHA1

    2af4e53f40b5b28613d35c82b9768bc78d2fad56

    SHA256

    aa89ac89659bffee9a9e8125f67df0c41ded196e282bcd9aa40bb703637a2527

    SHA512

    3dcae80f39b429085d4b44aad6b3108e665a6d25e74694ef6730d171866abff60c55e7b4cb31f9520f8d825b041ddc7648aeac2977027bf4d4eb482567ef10d8

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

    Filesize

    3KB

    MD5

    b5f63423f55e96fabcd1b186b27ce0c4

    SHA1

    581b488265a2f159836409853f4b97eb5941bd48

    SHA256

    451cd58d101dc6219943589eedc0789ff95f35be417f63555ebde5d354e7c11a

    SHA512

    f1e9873c6c88964035589f1dbfa28bff55315a66d471e69332f96c837855252187b719d5660baee2d5e3bb5d86b8c42e54826546b6e0d949010a6c7d2facadeb

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    64B

    MD5

    d8b9a260789a22d72263ef3bb119108c

    SHA1

    376a9bd48726f422679f2cd65003442c0b6f6dd5

    SHA256

    d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

    SHA512

    550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    1KB

    MD5

    fc08d9efbf45b4045fdf2cfc507ddceb

    SHA1

    7a1095765f0b9ed6a04afeb084f4e78cc25aed5c

    SHA256

    b11437cfbe0773154d082440842d8754f31a0ff920b86a1c518cefbe9e0bc92e

    SHA512

    2f765d087a043d05720445383409bbab5f2a17f46c10257589a94a8dfa22e5888692879d25df2e78192e6a226ad3c44921689104a3e40f2a45ffe2cc0ba10571

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    1KB

    MD5

    b5461b7b030e3c0cf534f13f48b084b4

    SHA1

    7cc7e457fd46e10aec50338fc7e5f33371fa9012

    SHA256

    051a97309a5c4eff97dd12f1ca48bbea912eb1a24b0067dfb102119226de25de

    SHA512

    bcc06c0e0631437d672b18fdd22ff077585fdc78f057a9aa83d7870a6b889fc774d7f1590ef57235763fbbc41b7dd48346d860c752eaa79800d6a53af8317b23

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    1KB

    MD5

    c5d6221bf33616310d317216ac1ba3c9

    SHA1

    6e1cff1bcd242d2d6e05a8a1f8feca65deca8e25

    SHA256

    f4f1e46227ba9a115b4801843152916ea1e42807296c9debf587e20cfbe16e66

    SHA512

    782bfc457319b2c10f4730dc756b83a9f537d80a4dc95d30f4bd9c0b7394b3a6a63a3162b74bf4927989febf70fbfc349e44bb2170db75f6d74e5291ca1118d6

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l0ne2fmr.rzm.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1244-2-0x0000021374C10000-0x0000021374C32000-memory.dmp

    Filesize

    136KB

  • memory/1244-21-0x00000213771C0000-0x00000213771CE000-memory.dmp

    Filesize

    56KB

  • memory/1244-22-0x0000021377330000-0x000002137734A000-memory.dmp

    Filesize

    104KB