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Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20230621-en
  • resource tags

    arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
  • submitted
    30/06/2023, 10:56

General

  • Target

    dobro.exe

  • Size

    151KB

  • MD5

    a443234e456bbc4a78605ab336e7d7f6

  • SHA1

    3ce499b7866a684755ae6b38980438719bff784b

  • SHA256

    723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

  • SHA512

    4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

  • SSDEEP

    3072:klgjq8s+yJueAjVd1nut+uV2mTVDjFwkWl176jZ1hCagdgvPW:WgjqARVdRQ/vqkg1gEagdgH

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed_CrosSs

C2

5.101.21.20:1555

Mutex

4742a84879c01b0661392ad95615a345

Attributes
  • reg_key

    4742a84879c01b0661392ad95615a345

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dobro.exe
    "C:\Users\Admin\AppData\Local\Temp\dobro.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1956
    • C:\Users\Admin\AppData\Local\Temp\spoolsv.exe
      "C:\Users\Admin\AppData\Local\Temp\spoolsv.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1704
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\spoolsv.exe" "spoolsv.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:568
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM explorer.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:672

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\spoolsv.exe

    Filesize

    151KB

    MD5

    a443234e456bbc4a78605ab336e7d7f6

    SHA1

    3ce499b7866a684755ae6b38980438719bff784b

    SHA256

    723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

    SHA512

    4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

  • C:\Users\Admin\AppData\Local\Temp\spoolsv.exe

    Filesize

    151KB

    MD5

    a443234e456bbc4a78605ab336e7d7f6

    SHA1

    3ce499b7866a684755ae6b38980438719bff784b

    SHA256

    723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

    SHA512

    4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

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

    Filesize

    151KB

    MD5

    a443234e456bbc4a78605ab336e7d7f6

    SHA1

    3ce499b7866a684755ae6b38980438719bff784b

    SHA256

    723d4e16788b240cd61087fe9b70d3f6e60117d0b7af0e242457a77541e277ce

    SHA512

    4fdfb874d9db98058709ce72bb7ca8b9dad2307f168ee2aae225ecc26fec33f5c41ceaa67d61ad6617181ccb85a237283e75cb6f43a74051155ec8c0d7fdbcd1

  • memory/1704-62-0x00000000001B0000-0x00000000001F0000-memory.dmp

    Filesize

    256KB

  • memory/1956-54-0x0000000000990000-0x00000000009D0000-memory.dmp

    Filesize

    256KB