Overview

overview

10

Static

static

10

1b32ce4cb4...3c.exe

windows7_x64

10

1b32ce4cb4...3c.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    30-06-2022 20:49

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General

  • Target

    1b32ce4cb4efc534e6716d1d52d7673c.exe

  • Size

    52KB

  • MD5

    1b32ce4cb4efc534e6716d1d52d7673c

  • SHA1

    aaf37379f8a17661b197f0e2314ba7e29fcec069

  • SHA256

    046f0fdb5d6d0489e8a81c239f311c2a26e2ca18f5b58c4f4655e7ab1862e026

  • SHA512

    ccf0262da4e9242225ff943a3e145b65068589df863a89fa97581abeac04355e102187843f2d596b0f324ed795862000e9b6af841b194e7fd4ed72cfe164bf6b

Score
10/10
njratkirieshkaevasionpersistencesuricatatrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

Kirieshka

C2

4.tcp.eu.ngrok.io:17963

Mutex

7a59d0933f6f469cabe3a8b0b803e909

Attributes
  • reg_key

    7a59d0933f6f469cabe3a8b0b803e909

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b32ce4cb4efc534e6716d1d52d7673c.exe
    "C:\Users\Admin\AppData\Local\Temp\1b32ce4cb4efc534e6716d1d52d7673c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2408
    • C:\Users\Admin\AppData\Roaming\system32.exe
      "C:\Users\Admin\AppData\Roaming\system32.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Drops autorun.inf file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\system32.exe" "system32.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:3540
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Exsample.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2240

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:\Users\Admin\AppData\Roaming\system32.exe
    Filesize

    52KB

    MD5

    1b32ce4cb4efc534e6716d1d52d7673c

    SHA1

    aaf37379f8a17661b197f0e2314ba7e29fcec069

    SHA256

    046f0fdb5d6d0489e8a81c239f311c2a26e2ca18f5b58c4f4655e7ab1862e026

    SHA512

    ccf0262da4e9242225ff943a3e145b65068589df863a89fa97581abeac04355e102187843f2d596b0f324ed795862000e9b6af841b194e7fd4ed72cfe164bf6b

    Download Submit
  • C:\Users\Admin\AppData\Roaming\system32.exe
    Filesize

    52KB

    MD5

    1b32ce4cb4efc534e6716d1d52d7673c

    SHA1

    aaf37379f8a17661b197f0e2314ba7e29fcec069

    SHA256

    046f0fdb5d6d0489e8a81c239f311c2a26e2ca18f5b58c4f4655e7ab1862e026

    SHA512

    ccf0262da4e9242225ff943a3e145b65068589df863a89fa97581abeac04355e102187843f2d596b0f324ed795862000e9b6af841b194e7fd4ed72cfe164bf6b

    Download Submit
  • memory/2240-137-0x0000000000000000-mapping.dmp
    Download
  • memory/2408-130-0x00000000746F0000-0x0000000074CA1000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/2408-134-0x00000000746F0000-0x0000000074CA1000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3540-136-0x0000000000000000-mapping.dmp
    Download
  • memory/3720-131-0x0000000000000000-mapping.dmp
    Download
  • memory/3720-135-0x00000000746F0000-0x0000000074CA1000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3720-138-0x00000000746F0000-0x0000000074CA1000-memory.dmp
    Filesize

    5.7MB

    Download