Overview

overview

10

Static

static

10

tmp/42b650...er.exe

windows7_x64

10

tmp/42b650...er.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    126s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    15-12-2021 23:04

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General

  • Target

    tmp/42b65022-e76e-41d7-94f1-6dd7b719243c_server.exe

  • Size

    22KB

  • MD5

    c53d13780336aefe9b4318b19eba09a0

  • SHA1

    90682596f5da8e19c88f77d74a569d8da8521cfa

  • SHA256

    8774a2f15efbfc88e6a7c1831074909d1fbddbe895f2d900b111ccce16178c03

  • SHA512

    9a7249c1d5e33add5b0d84dee20e5641789d202f774e77e3a902271550e88f35f2a7d0f70a151a46908d87d91e19641296e6e4ec94d5ba52aec65ef73a3c4c83

Score
10/10
njrattestevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

test

C2

127.0.0.1:1443

Mutex

74cc423dce7f45f8f93124254b62aa00

Attributes
  • reg_key

    74cc423dce7f45f8f93124254b62aa00

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

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

  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp\42b65022-e76e-41d7-94f1-6dd7b719243c_server.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp\42b65022-e76e-41d7-94f1-6dd7b719243c_server.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Users\Admin\AppData\Local\Temp\worm.exe
      "C:\Users\Admin\AppData\Local\Temp\worm.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4320
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\worm.exe" "worm.exe" ENABLE
        3⤵
          PID:1644

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\worm.exe
      MD5

      c53d13780336aefe9b4318b19eba09a0

      SHA1

      90682596f5da8e19c88f77d74a569d8da8521cfa

      SHA256

      8774a2f15efbfc88e6a7c1831074909d1fbddbe895f2d900b111ccce16178c03

      SHA512

      9a7249c1d5e33add5b0d84dee20e5641789d202f774e77e3a902271550e88f35f2a7d0f70a151a46908d87d91e19641296e6e4ec94d5ba52aec65ef73a3c4c83

      Download Submit
    • C:\Users\Admin\AppData\Local\Temp\worm.exe
      MD5

      c53d13780336aefe9b4318b19eba09a0

      SHA1

      90682596f5da8e19c88f77d74a569d8da8521cfa

      SHA256

      8774a2f15efbfc88e6a7c1831074909d1fbddbe895f2d900b111ccce16178c03

      SHA512

      9a7249c1d5e33add5b0d84dee20e5641789d202f774e77e3a902271550e88f35f2a7d0f70a151a46908d87d91e19641296e6e4ec94d5ba52aec65ef73a3c4c83

      Download Submit
    • memory/1644-120-0x0000000000000000-mapping.dmp
      Download
    • memory/2140-115-0x0000000002280000-0x0000000002281000-memory.dmp
      Filesize

      4KB

      Download
    • memory/4320-116-0x0000000000000000-mapping.dmp
      Download
    • memory/4320-119-0x0000000002560000-0x0000000002561000-memory.dmp
      Filesize

      4KB

      Download