General

  • Target

    ks4.021.3.10.391en_25092.exe

  • Size

    2.6MB

  • Sample

    230322-sy37dahf44

  • MD5

    c981d0b88d6105d07a0b7e8c18c26816

  • SHA1

    44675421dcd4f1c84d59482878fed08ab35cb637

  • SHA256

    1ef55e3f98c99fd6583a6b4080ecf0bc71de7c2889c910ec73c9df9f3e282b32

  • SHA512

    870ae87c2ebc825ad7ea28d8c279f706e614cbdfde4b5b9b63d742a5377474109e89910feda8140027fa2c81b666d47cee8e3e9d7944992eeaffe465cfca1f47

  • SSDEEP

    49152:V47Nlau3ZrJvDrO61pLTv1qfeosvBF2D7AZyzpLcsHOR+9rp+Hgd0OAoq89E783y:VeNlau39JO61x8f2SnC89l+i0OPrp

Malware Config

Extracted

Family

njrat

Version

0.7.3

Botnet

resilencoa 2023

C2

verderesilencia.duckdns.org:2010

Mutex

te culio

Attributes
  • reg_key

    te culio

  • splitter

    2023

Targets

    • Target

      ks4.021.3.10.391en_25092.exe

    • Size

      2.6MB

    • MD5

      c981d0b88d6105d07a0b7e8c18c26816

    • SHA1

      44675421dcd4f1c84d59482878fed08ab35cb637

    • SHA256

      1ef55e3f98c99fd6583a6b4080ecf0bc71de7c2889c910ec73c9df9f3e282b32

    • SHA512

      870ae87c2ebc825ad7ea28d8c279f706e614cbdfde4b5b9b63d742a5377474109e89910feda8140027fa2c81b666d47cee8e3e9d7944992eeaffe465cfca1f47

    • SSDEEP

      49152:V47Nlau3ZrJvDrO61pLTv1qfeosvBF2D7AZyzpLcsHOR+9rp+Hgd0OAoq89E783y:VeNlau39JO61x8f2SnC89l+i0OPrp

    • njRAT/Bladabindi

      Widely used RAT written in .NET.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • 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 Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Bootkit

1
T1067

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Discovery

Security Software Discovery

1
T1063

Query Registry

5
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

2
T1120

Tasks