Extracted

Extracted

• • Target

    UDS-Virus.Win32.PolyRansom.a-a245bb21af350757ae0eebbd3e8a13332f48a02393cf508e2668835cc98e6dc6.exe

  • Size

    148KB

  • MD5

    d197fad90535fb974db139537a091a5b

  • SHA1

    5529175952d3fa0697124260e46ec1dbd0c63ae7

  • SHA256

    a245bb21af350757ae0eebbd3e8a13332f48a02393cf508e2668835cc98e6dc6

  • SHA512

    1d43209ee1d950a433b08a05a23c69f88b376db3f52f29c84301d5235febda52a37c690abec96c2dfd63d4917b731b5544a548ce1490d9cf36aba9a031bac35d

  • SSDEEP

    3072:Gs6dE9I6+dZXlX1sZhuJHxleadYgJcuFsdazXflJv:GYpC16C6adXcFcz

  Score

  10^/10

  badrabbittroldeshwannacrybootkitdiscoveryevasionpersistenceransomwarethemidatrojanupxworm

  • BadRabbit

    Ransomware family discovered in late 2017, mainly targeting Russia and Ukraine.

    ransomwarebadrabbit

  • Modifies WinLogon for persistence

    persistence

  • Troldesh, Shade, Encoder.858

    Troldesh is a ransomware spread by malspam.

    ransomwaretrojantroldesh

  • Wannacry

    WannaCry is a ransomware cryptoworm.

    ransomwarewormwannacry

  • Checks for common network interception software

    Looks in the registry for tools like Wireshark or Fiddler commonly used to analyze network activity.

    evasion

  • Deletes shadow copies

    Ransomware often targets backup files to inhibit system recovery.

    ransomware

  • Enumerates VirtualBox registry keys

    evasion

  • Disables RegEdit via registry modification

    evasion

  • Disables Task Manager via registry modification

    evasion

  • Downloads MZ/PE file

  • Executes dropped EXE

  • Modifies Windows Firewall

    evasion

  • Sets file execution options in registry

    persistence

  • Stops running service(s)

    evasion

  • 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.

  • Identifies Wine through registry keys

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion

  • Loads dropped DLL

  • Modifies file permissions

    discovery

  • Themida packer

    Detects Themida, an advanced Windows software protection system.

    themida

  • Adds Run key to start application

    persistence

  • Checks installed software on the system

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery

  • Enumerates connected drives

    Attempts to read the root path of hard drives other than the default C: drive.

  • Legitimate hosting services abused for malware hosting/C2

  • Modifies WinLogon

    persistence

  • Writes to the Master Boot Record (MBR)

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

    bootkitpersistence

  • Suspicious use of NtSetInformationThreadHideFromDebugger

  behavioral1behavioral2