Overview

overview

10

Static

static

4d4cb53955...5b.exe

windows7_x64

10

4d4cb53955...5b.exe

windows10_x64

10

Sharing

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General

  • Target
    4d4cb53955f998f339000039ebd0685b.exe
  • Size 6.0MB
  • Sample210523-tv8zybweee
  • SHA256 39f4d59b94d2b39408e4dc962fbf2e65a79b234b46a42c6b05856e60acf7f95b
  • MD5 SHA1 SHA512
Score
10/10
servhelperbackdoordiscoveryexploitpersistencetrojanupx

Malware Config

Extracted

Language

  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    https://raw.githubusercontent.com/sqlitey/sqlite/master/speed.ps1

Targets

    • Target
      4d4cb53955f998f339000039ebd0685b.exe
    • Size 6.0MB
    • SHA256 39f4d59b94d2b39408e4dc962fbf2e65a79b234b46a42c6b05856e60acf7f95b
    • MD5 SHA1 SHA512
    Score
    10/10
    servhelperbackdoordiscoveryexploitpersistencetrojanupx

    • ServHelper

      ServHelper is a backdoor written in Delphi and is associated with the hacking group TA505.

      trojanbackdoorservhelper

    • Grants admin privileges

      Uses net.exe to modify the user's privileges.

    • Blocklisted process makes network request

    • Modifies RDP port number used by Windows

    • Possible privilege escalation attempt

      exploit

    • Sets DLL path for service in the registry

      persistence

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks