General

  • Target

    ysetup2.exe

  • Size

    2.3MB

  • Sample

    240522-lh7fjaaf86

  • MD5

    86aaea5576e97121dc4c45f2c6ccaa2b

  • SHA1

    bc7b3c16b32ff92caae2a43b362a32cde8d9f9b9

  • SHA256

    aea0a61644dba55ed505373afebb4e2e5c077c66ec744e7827b4887babcbfc6d

  • SHA512

    7d00e93e5df0ac06718567dcd7e39bf59ae3937f828a0348eb24626b14e66f11b26a6da5ea8afbb644d2b1585076a0608295c9995f22107fc622f7519a26eb5c

  • SSDEEP

    24576:2qCdMP5SdezpyFNrhSCPuoX0k6O2BusxExVJherLg31+mYGnKBF6JETXHOaDU:2P6hSrcCPT0JrLg31+mYGnKDVTXG

Malware Config

Targets

    • Target

      ysetup2.exe

    • Size

      2.3MB

    • MD5

      86aaea5576e97121dc4c45f2c6ccaa2b

    • SHA1

      bc7b3c16b32ff92caae2a43b362a32cde8d9f9b9

    • SHA256

      aea0a61644dba55ed505373afebb4e2e5c077c66ec744e7827b4887babcbfc6d

    • SHA512

      7d00e93e5df0ac06718567dcd7e39bf59ae3937f828a0348eb24626b14e66f11b26a6da5ea8afbb644d2b1585076a0608295c9995f22107fc622f7519a26eb5c

    • SSDEEP

      24576:2qCdMP5SdezpyFNrhSCPuoX0k6O2BusxExVJherLg31+mYGnKBF6JETXHOaDU:2P6hSrcCPT0JrLg31+mYGnKDVTXG

    • 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 BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • 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

    • 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.

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks