Overview

overview

10

Static

static

10

dssddsdsdser.exe

windows7-x64

10

dssddsdsdser.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220721-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05-08-2022 07:31

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General

  • Target

    dssddsdsdser.exe

  • Size

    37KB

  • MD5

    9949e4b8b759ca8bc677f46cf19cf541

  • SHA1

    a74bc5fe4c4999a8e3c93e26f76403f601ad1116

  • SHA256

    f4d0a71613ef44605049f708e224f93b96846174565eeaf3c857f18af58f5f6a

  • SHA512

    85c7bbccd80a84a5c662774fe1ca14a5e1229eb51bec79696270108b222fafd99c6d596cca33985cf0c2e50f23c27940647ca2524c392fc9d8bbf783c5704c78

Score
10/10
njrathackedevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

susiahat24199a.ddns.net:5552

Mutex

b94fe95343d85bb18dd50d099af4eb73

Attributes
  • reg_key

    b94fe95343d85bb18dd50d099af4eb73

  • 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.

  • 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\dssddsdsdser.exe
    "C:\Users\Admin\AppData\Local\Temp\dssddsdsdser.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4412
    • C:\Users\Admin\server.exe
      "C:\Users\Admin\server.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:1880
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:808
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM System32.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3744

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\server.exe
    Filesize

    37KB

    MD5

    9949e4b8b759ca8bc677f46cf19cf541

    SHA1

    a74bc5fe4c4999a8e3c93e26f76403f601ad1116

    SHA256

    f4d0a71613ef44605049f708e224f93b96846174565eeaf3c857f18af58f5f6a

    SHA512

    85c7bbccd80a84a5c662774fe1ca14a5e1229eb51bec79696270108b222fafd99c6d596cca33985cf0c2e50f23c27940647ca2524c392fc9d8bbf783c5704c78

    Download Submit
  • C:\Users\Admin\server.exe
    Filesize

    37KB

    MD5

    9949e4b8b759ca8bc677f46cf19cf541

    SHA1

    a74bc5fe4c4999a8e3c93e26f76403f601ad1116

    SHA256

    f4d0a71613ef44605049f708e224f93b96846174565eeaf3c857f18af58f5f6a

    SHA512

    85c7bbccd80a84a5c662774fe1ca14a5e1229eb51bec79696270108b222fafd99c6d596cca33985cf0c2e50f23c27940647ca2524c392fc9d8bbf783c5704c78

    Download Submit
  • memory/808-136-0x0000000000000000-mapping.dmp
    Download
  • memory/1880-131-0x0000000000000000-mapping.dmp
    Download
  • memory/1880-135-0x0000000074AC0000-0x0000000075071000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/1880-138-0x0000000074AC0000-0x0000000075071000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/3744-137-0x0000000000000000-mapping.dmp
    Download
  • memory/4412-130-0x0000000074AC0000-0x0000000075071000-memory.dmp
    Filesize

    5.7MB

    Download
  • memory/4412-134-0x0000000074AC0000-0x0000000075071000-memory.dmp
    Filesize

    5.7MB

    Download