Extracted

• • Target

    40d10714cfb75e2f22c44fd44e85d1d0N

  • Size

    7.1MB

  • MD5

    40d10714cfb75e2f22c44fd44e85d1d0

  • SHA1

    79e291688ecb088468e0162b0685956be1206fbd

  • SHA256

    1d35504c81463a2597916e4ea5448d45caee98ccc8557e256bcc05a567584b37

  • SHA512

    98095c75bc12cc6a0f353f7d40155a44222dab25569ee736ab232f7c985ebfbf4ffb9fab80dd27e2c581729f571029ed6eaea61d5bac32ac1ac3566e7faf2e4b

  • SSDEEP

    196608:ZJM3nfEyJ8X2RmnK0v0Ahh0yfcjkbMebHjgTF8R:Z2f6X2RFWhSyQe3sFS

  Score

  10^/10

  servhelperbackdoordefense_evasiondiscoveryexecutionexploitlateral_movementpersistencetrojanupx

  • 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.

  • Remote Service Session Hijacking: RDP Hijacking

    Adversaries may hijack a legitimate user's remote desktop session to move laterally within an environment.

    lateral_movement

  • Blocklisted process makes network request

  • Indicator Removal: Network Share Connection Removal

    Adversaries may remove share connections that are no longer useful in order to clean up traces of their operation.

    defense_evasion

  • Modifies RDP port number used by Windows

  • Possible privilege escalation attempt

    exploit

  • Server Software Component: Terminal Services DLL

    persistence

  • Checks computer location settings

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

  • Deletes itself

  • Executes dropped EXE

  • Loads dropped DLL

  • Modifies file permissions

    discovery

  • UPX packed file

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

    upx

  • Indicator Removal: File Deletion

    Adversaries may delete files left behind by the actions of their intrusion activity.

    defense_evasion

  • Legitimate hosting services abused for malware hosting/C2

  • Drops file in System32 directory

  • Suspicious use of SetThreadContext

  behavioral1behavioral2