Overview

overview

10

Static

static

Filmora-Wo...er.exe

windows7_x64

10

Filmora-Wo...er.exe

windows10_x64

10

Sharing

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General

  • Target

    Filmora-Wondershare-Installer.exe

  • Size

    9.2MB

  • Sample

    210720-cx1jbtl3zs

  • MD5

    5e12e56a643c71b913ea60f48f28726d

  • SHA1

    8fd9ef3e15b545335c9cf8a16e7d49bdedc7b6fd

  • SHA256

    79745c2263c8abe5b916e39e577652c029b5b586e7ccb39ee63ed0fc1568c39d

  • SHA512

    807888068394b8072d607a83b7a181f5018c21c1efd2b8ae433ac59dc28bfbec23e1b13d8b6a2447a3ff8bb9b7ecd71d4d7bff55903a2d23a60b817142c9bae3

Score
10/10
servhelperbackdoorbootkitdiscoveryexploitpersistencetrojanupx

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

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

Targets

    • Target

      Filmora-Wondershare-Installer.exe

    • Size

      9.2MB

    • MD5

      5e12e56a643c71b913ea60f48f28726d

    • SHA1

      8fd9ef3e15b545335c9cf8a16e7d49bdedc7b6fd

    • SHA256

      79745c2263c8abe5b916e39e577652c029b5b586e7ccb39ee63ed0fc1568c39d

    • SHA512

      807888068394b8072d607a83b7a181f5018c21c1efd2b8ae433ac59dc28bfbec23e1b13d8b6a2447a3ff8bb9b7ecd71d4d7bff55903a2d23a60b817142c9bae3

    Score
    10/10
    servhelperbackdoorbootkitdiscoveryexploitpersistencetrojanupx

    • 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

    • Downloads MZ/PE file

    • Executes dropped EXE

    • 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

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Account Manipulation

1
T1098

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

File Permissions Modification

1
T1222

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Remote Desktop Protocol

1
T1076

Collection

Exfiltration

Command and Control

Impact

Tasks