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Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    05/02/2025, 07:58

General

  • Target

    am.exe

  • Size

    93KB

  • MD5

    59b40a406af1b307f204b246371db9bf

  • SHA1

    8448937d6dcd4868082a2e09fd6ff582d9c73c70

  • SHA256

    5f1eaaa7781758b4830a2c576234d1687f95c1b058b48d833a4d71f2fa970d6b

  • SHA512

    1c392cda14f386a45b20f08f2f5ec3a6fcfd06f649cfe21c1f3f9ce6a31e4485cb5598c41c2b4cbcf312bc67ca0db41e1dc887caeeabd325f6259ee85cf49fec

  • SSDEEP

    768:WY3TmdD9O/pBcxYsbae6GIXb9pDX2KC98PL0OXLeuXxrjEtCdnl2pi1Rz4Rk3Y7E:hm3Ox6baIa9R/j00ljEwzGi1dDuD6gS

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

bavilla

C2

hakim32.ddns.net:2000

192.168.1.15:5552

Mutex

522259726718d1753f479b9af3c0b6f5

Attributes
  • reg_key

    522259726718d1753f479b9af3c0b6f5

  • splitter

    |'|'|

Signatures

  • Njrat family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 3 IoCs
  • Drops startup file 4 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 11 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 9 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\am.exe
    "C:\Users\Admin\AppData\Local\Temp\am.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2448
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2200
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:1624
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2888
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2868
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /sc minute /mo 1 /tn StUpdate /tr C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2720
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {E15B7B95-5E08-4E33-94CA-C00EC1364F5A} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Users\Admin\AppData\Local\Temp\StUpdate.exe
      C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1816
    • C:\Users\Admin\AppData\Local\Temp\StUpdate.exe
      C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2924
    • C:\Users\Admin\AppData\Local\Temp\StUpdate.exe
      C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1876

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\app

    Filesize

    4B

    MD5

    c6bdbc9d86009ccf7e8de878c9603213

    SHA1

    2a4b8716f978f2d107bcd8294b486a5ee45afe6e

    SHA256

    36a067fdfcee95eb270f0b72e3b9e40d52c907d749fb9a8490d82f8ee56b29eb

    SHA512

    c42a52cd8837e2533b3d5ec97639f0c94287e3d7a6c73635c21df50eba8483b60df15bf262a308836875cd9afed504e7f98a2f6b254e4181fe548b1853d42256

  • \Users\Admin\AppData\Local\Temp\server.exe

    Filesize

    93KB

    MD5

    59b40a406af1b307f204b246371db9bf

    SHA1

    8448937d6dcd4868082a2e09fd6ff582d9c73c70

    SHA256

    5f1eaaa7781758b4830a2c576234d1687f95c1b058b48d833a4d71f2fa970d6b

    SHA512

    1c392cda14f386a45b20f08f2f5ec3a6fcfd06f649cfe21c1f3f9ce6a31e4485cb5598c41c2b4cbcf312bc67ca0db41e1dc887caeeabd325f6259ee85cf49fec

  • memory/2200-15-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB

  • memory/2200-16-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB

  • memory/2200-25-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB

  • memory/2448-0-0x0000000073F11000-0x0000000073F12000-memory.dmp

    Filesize

    4KB

  • memory/2448-1-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB

  • memory/2448-2-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB

  • memory/2448-14-0x0000000073F10000-0x00000000744BB000-memory.dmp

    Filesize

    5.7MB