Analysis

  • max time kernel
    154s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    24-09-2021 06:04

General

  • Target

    461f9398938a1c24fc0cfc2b350b8f2f707f228f3970181940a028663acb8da2.exe

  • Size

    3.0MB

  • MD5

    8a060daac1e73524a227875e5da6eb3d

  • SHA1

    9cd8730422dc2553e028828feb370341da702061

  • SHA256

    461f9398938a1c24fc0cfc2b350b8f2f707f228f3970181940a028663acb8da2

  • SHA512

    9fee328d96c2c2df6bd9a37c835dd7272215f0952479d56f09d0371375bc758388c96a598319e6e11a3673e270738794177ef0ca9b8b817274b3d5d65eab0d87

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

lightcf.ddns.net:1177

Mutex

f20acdfb6b0a6c02ffcee135dec9d57c

Attributes
  • reg_key

    f20acdfb6b0a6c02ffcee135dec9d57c

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Executes dropped EXE 2 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 4 IoCs
  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\461f9398938a1c24fc0cfc2b350b8f2f707f228f3970181940a028663acb8da2.exe
    "C:\Users\Admin\AppData\Local\Temp\461f9398938a1c24fc0cfc2b350b8f2f707f228f3970181940a028663acb8da2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3688
    • C:\Users\Admin\AppData\Local\Temp\Server.exe
      C:\Users\Admin\AppData\Local\Temp/Server.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2196
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE
        3⤵
          PID:4412
      • C:\Users\Admin\AppData\Local\Temp\jf_crazycf_1_4.exe
        C:\Users\Admin\AppData\Local\Temp/jf_crazycf_1_4.exe
        2⤵
        • Executes dropped EXE
        • Checks BIOS information in registry
        • Checks computer location settings
        • Identifies Wine through registry keys
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1868
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:4508
    • C:\Windows\system32\browser_broker.exe
      C:\Windows\system32\browser_broker.exe -Embedding
      1⤵
      • Modifies Internet Explorer settings
      PID:3140
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1316
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:1716
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:3836
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Drops file in Windows directory
      • Modifies registry class
      PID:4220
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      PID:4812

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Virtualization/Sandbox Evasion

    2
    T1497

    Modify Registry

    2
    T1112

    Discovery

    Query Registry

    4
    T1012

    Virtualization/Sandbox Evasion

    2
    T1497

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Packages\microsoft.microsoftedge_8wekyb3d8bbwe\AC\#!001\Microsoft\Windows\3720402701\2274612954.pri
      MD5

      0db264b38ac3c5f6c140ba120a7fe72f

      SHA1

      51aa2330c597e84ed3b0d64bf6b73bf6b15f9d74

      SHA256

      2f6955b0f5277a7904c59e461bfa6b06c54fece0d7c11f27408fa7a281a4556d

      SHA512

      3534c243516cef5cee0540d5efd5cde1f378e127e6013b5e309a2e0be8393417bfe458706564b4b955f92132a51e2772c67f9fd90441476cc3512a5d9f910d84

    • C:\Users\Admin\AppData\Local\Temp\Server.exe
      MD5

      a0d11518eee518a2d24ba47c2b6e8770

      SHA1

      ab07ca56c9304ecb7fc81f7f8a366c71a0d47293

      SHA256

      a53ae4524bcf01097019dce7a4b31c970d9734da90bf6c7de65420b30e9c849c

      SHA512

      d30d8a66e294df7da207c1fc8970b56900e62d8592254a5f3e7a06c62054f78008b8d20e6944abd219f4a97b44f66172eab92f99b2228502157728431f5cdcf4

    • C:\Users\Admin\AppData\Local\Temp\Server.exe
      MD5

      a0d11518eee518a2d24ba47c2b6e8770

      SHA1

      ab07ca56c9304ecb7fc81f7f8a366c71a0d47293

      SHA256

      a53ae4524bcf01097019dce7a4b31c970d9734da90bf6c7de65420b30e9c849c

      SHA512

      d30d8a66e294df7da207c1fc8970b56900e62d8592254a5f3e7a06c62054f78008b8d20e6944abd219f4a97b44f66172eab92f99b2228502157728431f5cdcf4

    • C:\Users\Admin\AppData\Local\Temp\jf_crazycf_1_4.exe
      MD5

      46191543960191df082176d7ee9e1466

      SHA1

      3c40d877d92ee5b44f5ed1df2d383db19c929380

      SHA256

      7978aafb1f8aae0906ca62ff938226711e08dcccc8727f718e49d13aaf6ce220

      SHA512

      4d677f20f5da2f06d31afa71f47a8594508cef6ba7fb5ba8c80a59e33ba06bfc4e6a2a0a193840ee83919074bd2c54db23350de2ffef20114928be5d37cb2084

    • C:\Users\Admin\AppData\Local\Temp\jf_crazycf_1_4.exe
      MD5

      46191543960191df082176d7ee9e1466

      SHA1

      3c40d877d92ee5b44f5ed1df2d383db19c929380

      SHA256

      7978aafb1f8aae0906ca62ff938226711e08dcccc8727f718e49d13aaf6ce220

      SHA512

      4d677f20f5da2f06d31afa71f47a8594508cef6ba7fb5ba8c80a59e33ba06bfc4e6a2a0a193840ee83919074bd2c54db23350de2ffef20114928be5d37cb2084

    • memory/1868-129-0x0000000004970000-0x0000000004971000-memory.dmp
      Filesize

      4KB

    • memory/1868-133-0x00000000070C0000-0x0000000007145000-memory.dmp
      Filesize

      532KB

    • memory/1868-122-0x0000000007160000-0x00000000071E6000-memory.dmp
      Filesize

      536KB

    • memory/1868-124-0x0000000000400000-0x00000000008A6000-memory.dmp
      Filesize

      4.6MB

    • memory/1868-123-0x0000000077A00000-0x0000000077B8E000-memory.dmp
      Filesize

      1.6MB

    • memory/1868-125-0x00000000049D0000-0x00000000049D1000-memory.dmp
      Filesize

      4KB

    • memory/1868-126-0x00000000049A0000-0x00000000049A1000-memory.dmp
      Filesize

      4KB

    • memory/1868-127-0x00000000049B0000-0x00000000049B1000-memory.dmp
      Filesize

      4KB

    • memory/1868-128-0x00000000049C0000-0x00000000049C1000-memory.dmp
      Filesize

      4KB

    • memory/1868-118-0x0000000000000000-mapping.dmp
    • memory/1868-130-0x0000000004990000-0x0000000004991000-memory.dmp
      Filesize

      4KB

    • memory/1868-131-0x0000000004980000-0x0000000004981000-memory.dmp
      Filesize

      4KB

    • memory/1868-132-0x0000000007150000-0x0000000007151000-memory.dmp
      Filesize

      4KB

    • memory/1868-143-0x0000000007158000-0x000000000715A000-memory.dmp
      Filesize

      8KB

    • memory/1868-134-0x0000000007152000-0x0000000007153000-memory.dmp
      Filesize

      4KB

    • memory/1868-135-0x0000000007153000-0x0000000007154000-memory.dmp
      Filesize

      4KB

    • memory/1868-136-0x00000000071F0000-0x00000000071F1000-memory.dmp
      Filesize

      4KB

    • memory/1868-137-0x0000000007740000-0x0000000007741000-memory.dmp
      Filesize

      4KB

    • memory/1868-139-0x0000000004F90000-0x0000000004F91000-memory.dmp
      Filesize

      4KB

    • memory/1868-138-0x0000000007154000-0x0000000007156000-memory.dmp
      Filesize

      8KB

    • memory/1868-140-0x0000000007910000-0x0000000007911000-memory.dmp
      Filesize

      4KB

    • memory/1868-142-0x0000000008770000-0x00000000087CE000-memory.dmp
      Filesize

      376KB

    • memory/2196-121-0x0000000002C50000-0x0000000002C51000-memory.dmp
      Filesize

      4KB

    • memory/2196-115-0x0000000000000000-mapping.dmp
    • memory/4412-141-0x0000000000000000-mapping.dmp