Overview

overview

10

Static

static

10

539a1c84e8...6b.exe

windows7-x64

10

539a1c84e8...6b.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    206s
  • max time network
    200s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2022 01:01

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General

  • Target

    539a1c84e8f25f54c520bbf48b4aab6b.exe

  • Size

    159KB

  • MD5

    539a1c84e8f25f54c520bbf48b4aab6b

  • SHA1

    45872ded1cda755c5221958332e9863680b992e2

  • SHA256

    79c358be65277404a46eab5f2eaa0d2938a70ba55a2396c4957bddf7699b441f

  • SHA512

    98fd44c98796321528cddece682fc78fdd91b650da6fca6c4e976db4fecc7b775015868eb549c5d626a359e293930a55511026db2bed7a884b02279575eb0720

  • SSDEEP

    3072:HcXCfxe+yJJFy5K7u77HeoT1V0Qh634VHyaJl1lH5:8XCloqKO1hJl1lH5

Score
10/10
njrathackedevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

181.214.130.17:50100

Mutex

0c829ad93254e4900c3b4ce264339d97

Attributes
  • reg_key

    0c829ad93254e4900c3b4ce264339d97

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs 3 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 13 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\539a1c84e8f25f54c520bbf48b4aab6b.exe
    "C:\Users\Admin\AppData\Local\Temp\539a1c84e8f25f54c520bbf48b4aab6b.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Windows\iikofront.exe
      "C:\Windows\iikofront.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Drops autorun.inf file
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3208
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\iikofront.exe" "iikofront.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:4228

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Replication Through Removable Media

1
T1091

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

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Windows\iikofront.exe
    Filesize

    159KB

    MD5

    539a1c84e8f25f54c520bbf48b4aab6b

    SHA1

    45872ded1cda755c5221958332e9863680b992e2

    SHA256

    79c358be65277404a46eab5f2eaa0d2938a70ba55a2396c4957bddf7699b441f

    SHA512

    98fd44c98796321528cddece682fc78fdd91b650da6fca6c4e976db4fecc7b775015868eb549c5d626a359e293930a55511026db2bed7a884b02279575eb0720

    Download Submit
  • C:\Windows\iikofront.exe
    Filesize

    159KB

    MD5

    539a1c84e8f25f54c520bbf48b4aab6b

    SHA1

    45872ded1cda755c5221958332e9863680b992e2

    SHA256

    79c358be65277404a46eab5f2eaa0d2938a70ba55a2396c4957bddf7699b441f

    SHA512

    98fd44c98796321528cddece682fc78fdd91b650da6fca6c4e976db4fecc7b775015868eb549c5d626a359e293930a55511026db2bed7a884b02279575eb0720

    Download Submit
  • memory/1852-132-0x0000000074E50000-0x0000000075401000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1852-133-0x0000000074E50000-0x0000000075401000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1852-137-0x0000000074E50000-0x0000000075401000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3208-134-0x0000000000000000-mapping.dmp
    Download
  • memory/3208-138-0x0000000074E50000-0x0000000075401000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3208-139-0x0000000074E50000-0x0000000075401000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4228-140-0x0000000000000000-mapping.dmp
    Download