Analysis

  • max time kernel
    144s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    03-12-2020 16:53

General

  • Target

    winserv.exe

  • Size

    2.7MB

  • MD5

    cf2ab077a46219b6ce4a53517dd489ea

  • SHA1

    651b8d1377910e4728e85dcd231e269313ab9e1d

  • SHA256

    609b0a416f9b16a6df9b967dc32cd739402af31566e019a8fb8abdf3cb573e30

  • SHA512

    53fb1ac822467168ea8e7abdd72c78cdd90070b10773ce8c700c6784ab4cc3a03eb53887d158ce3a27779a5fbcf3300d2ccbedab79a34bfd42ddc91f68dbdad7

Score
10/10

Malware Config

Signatures

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\winserv.exe
    "C:\Users\Admin\AppData\Local\Temp\winserv.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2432
    • C:\Users\Admin\AppData\Local\Temp\winserv.exe
      C:\Users\Admin\AppData\Local\Temp\winserv.exe -second
      2⤵
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:3252
  • \??\c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s seclogon
    1⤵
    • Suspicious use of NtCreateUserProcessOtherParentProcess
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3612

Network

  • flag-unknown
    DNS
    rms-server.tektonit.ru
    Remote address:
    8.8.8.8:53
    Request
    rms-server.tektonit.ru
    IN A
    Response
    rms-server.tektonit.ru
    IN A
    185.175.44.167
  • 185.175.44.167:5655
    rms-server.tektonit.ru
    winserv.exe
    2.1kB
    1.3kB
    18
    20
  • 8.8.8.8:53
    rms-server.tektonit.ru
    dns
    68 B
    84 B
    1
    1

    DNS Request

    rms-server.tektonit.ru

    DNS Response

    185.175.44.167

MITRE ATT&CK Enterprise v6

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