Analysis

  • max time kernel
    188s
  • max time network
    196s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 18:42

General

  • Target

    8533ef6f79e259e9e5fe7c28f1fcd372.exe

  • Size

    227KB

  • MD5

    8533ef6f79e259e9e5fe7c28f1fcd372

  • SHA1

    48c1f9b2a798a374b6e8c2e5fb655c19e5fa2ed3

  • SHA256

    bbc8cabc1ba4f81d1ee316d3869ed8e61c91840cb533abee708a3099ab196470

  • SHA512

    533facb9e64028915336f7a7035e726409279309b05d2cf1e6def878513a85f49a9119f09e53bcc8371ff5bc8f91474b67934773e3c6a7ad12c3778ffa3f2697

  • SSDEEP

    3072:HSuZ00DVrF1rVcCPP+Tl6Ws5cUYTMExjHSTdMTfNlx35eRPG+79IwGrpc:J/2TAcZyOjNlri7Ww

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

h43vipforyou.ddns.net:1177

Mutex

869b16e2825dce24066aba38ee1a9add

Attributes
  • reg_key

    869b16e2825dce24066aba38ee1a9add

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8533ef6f79e259e9e5fe7c28f1fcd372.exe
    "C:\Users\Admin\AppData\Local\Temp\8533ef6f79e259e9e5fe7c28f1fcd372.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1052
    • C:\ProgramData\rejdit_free_fire.exe
      "C:\ProgramData\rejdit_free_fire.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:996
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\ProgramData\rejdit_free_fire.exe" "rejdit_free_fire.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1496

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\rejdit_free_fire.exe
    Filesize

    227KB

    MD5

    8533ef6f79e259e9e5fe7c28f1fcd372

    SHA1

    48c1f9b2a798a374b6e8c2e5fb655c19e5fa2ed3

    SHA256

    bbc8cabc1ba4f81d1ee316d3869ed8e61c91840cb533abee708a3099ab196470

    SHA512

    533facb9e64028915336f7a7035e726409279309b05d2cf1e6def878513a85f49a9119f09e53bcc8371ff5bc8f91474b67934773e3c6a7ad12c3778ffa3f2697

  • C:\ProgramData\rejdit_free_fire.exe
    Filesize

    227KB

    MD5

    8533ef6f79e259e9e5fe7c28f1fcd372

    SHA1

    48c1f9b2a798a374b6e8c2e5fb655c19e5fa2ed3

    SHA256

    bbc8cabc1ba4f81d1ee316d3869ed8e61c91840cb533abee708a3099ab196470

    SHA512

    533facb9e64028915336f7a7035e726409279309b05d2cf1e6def878513a85f49a9119f09e53bcc8371ff5bc8f91474b67934773e3c6a7ad12c3778ffa3f2697

  • \ProgramData\rejdit_free_fire.exe
    Filesize

    227KB

    MD5

    8533ef6f79e259e9e5fe7c28f1fcd372

    SHA1

    48c1f9b2a798a374b6e8c2e5fb655c19e5fa2ed3

    SHA256

    bbc8cabc1ba4f81d1ee316d3869ed8e61c91840cb533abee708a3099ab196470

    SHA512

    533facb9e64028915336f7a7035e726409279309b05d2cf1e6def878513a85f49a9119f09e53bcc8371ff5bc8f91474b67934773e3c6a7ad12c3778ffa3f2697

  • memory/996-58-0x0000000000000000-mapping.dmp
  • memory/996-62-0x0000000074100000-0x00000000746AB000-memory.dmp
    Filesize

    5.7MB

  • memory/996-64-0x0000000074100000-0x00000000746AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1052-54-0x0000000075291000-0x0000000075293000-memory.dmp
    Filesize

    8KB

  • memory/1052-55-0x0000000074100000-0x00000000746AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1052-56-0x0000000074100000-0x00000000746AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1052-63-0x0000000074100000-0x00000000746AB000-memory.dmp
    Filesize

    5.7MB

  • memory/1496-65-0x0000000000000000-mapping.dmp