General

  • Target

    uTorrent_zipsoft__13454__[29527].zip

  • Size

    366KB

  • Sample

    240509-qb9drsdh46

  • MD5

    b18cbeb1a704f3b9f2f774ed3e98ba06

  • SHA1

    853d96fcbfb8fcfffc0ca213e0fe09c6949e2bdc

  • SHA256

    8ba16cc70e9335f5cfa3189cf0dc6704ce88948729078730878ee17c185da134

  • SHA512

    dff57d1ea4cfadcfedcd72c1b91f3cef6d9c6864aa4f04ce4f22296f5c56543334d6f6105e3cd997703c5fb1491826892a223ee2869dfbfd45b446d29f05828f

  • SSDEEP

    6144:iKYmvIi1JgVqHceLfBajN3rqSKELt0O8T7p5BH4uusAFcH5LNYWdKVgbWZem744p:iKY6zY21JQbqVMBsp5BHQi5VVqP7V0C9

Malware Config

Targets

    • Target

      uTorrent_zipsoft__13454__[29527].exe

    • Size

      673KB

    • MD5

      f485331235333f85377f0a5da49f18db

    • SHA1

      44d80e2691b35705a20e3f8605a6b316a850ea48

    • SHA256

      5d0e089ecc3b9070368bd983cf7c56360b6d1f12bee8ea5a14df8b956fc31cf5

    • SHA512

      dfb3cf30bee7580a50097dcb2ead98a70c7ec60dd3ada52c6cae2f174f8e14b85693b9983d039557aca34a9b4136d755f8e198902965712d746c56d44cba2bf4

    • SSDEEP

      12288:9w8eE43nhb40+56Dbf4HIkwHj4qkTZXTBJhX:nJmBDr4Mj4q2X

    • Modifies boot configuration data using bcdedit

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Installed Components in the registry

    • Sets service image path in registry

    • Checks computer location settings

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

    • Executes dropped EXE

    • Identifies Wine through registry keys

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

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Registers COM server for autorun

    • UPX packed file

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

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks