Resubmissions

11-03-2023 21:36

230311-1gd5xsdb8x 7

11-03-2023 21:30

230311-1ct1ksdb6z 8

11-03-2023 21:18

230311-z5tpvabc85 8

General

  • Target

    Internet Download Manager 6.38.exe

  • Size

    13.1MB

  • Sample

    230311-1ct1ksdb6z

  • MD5

    3b92cc3d9e74a4c9ce8a4e0b52cfa5b6

  • SHA1

    3364f2b2a9685a3a52a30e455934cf392362f59e

  • SHA256

    435e71eca1998e991f6d99b4458fb253a84be79eaa50bab790342e3cfbf36097

  • SHA512

    b1e32e50009c801fc2c64ec6218323a7080ab507d8b8a7fe51bb6c0796ca9f9ef74f1870293693967fb2d4d6f71b011fedd3d4b85993af4a93e243364ee5db17

  • SSDEEP

    393216:lIB64fvSOb93lpgtmvtPODgYVa2njZZHygAK:064fKOh1pZvtPOEhSHyy

Malware Config

Targets

    • Target

      Internet Download Manager 6.38.exe

    • Size

      13.1MB

    • MD5

      3b92cc3d9e74a4c9ce8a4e0b52cfa5b6

    • SHA1

      3364f2b2a9685a3a52a30e455934cf392362f59e

    • SHA256

      435e71eca1998e991f6d99b4458fb253a84be79eaa50bab790342e3cfbf36097

    • SHA512

      b1e32e50009c801fc2c64ec6218323a7080ab507d8b8a7fe51bb6c0796ca9f9ef74f1870293693967fb2d4d6f71b011fedd3d4b85993af4a93e243364ee5db17

    • SSDEEP

      393216:lIB64fvSOb93lpgtmvtPODgYVa2njZZHygAK:064fKOh1pZvtPOEhSHyy

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • Adds Run key to start application

    • 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

    • Installs/modifies Browser Helper Object

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

    • Writes to the Master Boot Record (MBR)

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

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

2
T1060

Browser Extensions

1
T1176

Bootkit

1
T1067

Defense Evasion

Modify Registry

4
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Collection

Data from Local System

1
T1005

Tasks