Overview

overview

10

Static

static

10

OTCV4.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    34s
  • max time network
    37s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-05-2023 17:18

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General

  • Target

    OTCV4.exe

  • Size

    37KB

  • MD5

    7a0a0912ad87e27c72755a763ba619bc

  • SHA1

    586d0e9b757935b10c599fca4da6a2d5f0b1d931

  • SHA256

    8f4d3537fb26ef5dd6866f116a5790b2b86d9057a9102cbe7910f14999e0987a

  • SHA512

    20c51eeb7081c7981f695a698d5cc64bc63e63b40a3f4c5e538c3f9d0c992c489cf8389c8f63107ec6c27b426ab8344022def79e3954b16c7e6b990a61b10900

  • SSDEEP

    384:cNOKMizd5jnBhFbJ8ycPhzvzCwSYdOrAF+rMRTyN/0L+EcoinblneHQM3epzXKG0:KOg5lLJfcPhzWVYIrM+rMRa8NuUGJat

Score
10/10
njratsvchostevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

svchost

C2

summer-semester.at.ply.gg:13213

Mutex

b6942de4fd3f9edee3dcb471233c170b

Attributes
  • reg_key

    b6942de4fd3f9edee3dcb471233c170b

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • 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
  • Executes dropped EXE 1 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).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\OTCV4.exe
    "C:\Users\Admin\AppData\Local\Temp\OTCV4.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4104
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3832
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:2660

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

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svchost.exe
    Filesize

    37KB

    MD5

    7a0a0912ad87e27c72755a763ba619bc

    SHA1

    586d0e9b757935b10c599fca4da6a2d5f0b1d931

    SHA256

    8f4d3537fb26ef5dd6866f116a5790b2b86d9057a9102cbe7910f14999e0987a

    SHA512

    20c51eeb7081c7981f695a698d5cc64bc63e63b40a3f4c5e538c3f9d0c992c489cf8389c8f63107ec6c27b426ab8344022def79e3954b16c7e6b990a61b10900

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

    37KB

    MD5

    7a0a0912ad87e27c72755a763ba619bc

    SHA1

    586d0e9b757935b10c599fca4da6a2d5f0b1d931

    SHA256

    8f4d3537fb26ef5dd6866f116a5790b2b86d9057a9102cbe7910f14999e0987a

    SHA512

    20c51eeb7081c7981f695a698d5cc64bc63e63b40a3f4c5e538c3f9d0c992c489cf8389c8f63107ec6c27b426ab8344022def79e3954b16c7e6b990a61b10900

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

    37KB

    MD5

    7a0a0912ad87e27c72755a763ba619bc

    SHA1

    586d0e9b757935b10c599fca4da6a2d5f0b1d931

    SHA256

    8f4d3537fb26ef5dd6866f116a5790b2b86d9057a9102cbe7910f14999e0987a

    SHA512

    20c51eeb7081c7981f695a698d5cc64bc63e63b40a3f4c5e538c3f9d0c992c489cf8389c8f63107ec6c27b426ab8344022def79e3954b16c7e6b990a61b10900

    Download Submit
  • memory/4104-133-0x00000000018A0000-0x00000000018B0000-memory.dmp
    Filesize

    64KB

    Download