Analysis

  • max time kernel
    151s
  • max time network
    108s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    30-09-2021 12:35

General

  • Target

    3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe

  • Size

    136KB

  • MD5

    359a08045b66fe5f71fde43f9a6db01b

  • SHA1

    4580e9f5becff35c4c4e773931d18f2df166d9fc

  • SHA256

    3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67

  • SHA512

    81b120f81da9b442cb008093b54893d44dad911caffc1008c7de792e1420e1bedc15deb616f745e807410f47db3c049a316a77ffe42bef6959359f39af841683

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

127.0.0.1:5552

Mutex

279f6960ed84a752570aca7fb2dc1552

Attributes
  • reg_key

    279f6960ed84a752570aca7fb2dc1552

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 2 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe
    "C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe
      "C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe"
      2⤵
        PID:580
      • C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe
        "C:\Users\Admin\AppData\Local\Temp\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:8
        • C:\Users\Admin\AppData\Local\Temp\server.exe
          "C:\Users\Admin\AppData\Local\Temp\server.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1440
          • C:\Users\Admin\AppData\Local\Temp\server.exe
            "C:\Users\Admin\AppData\Local\Temp\server.exe"
            4⤵
            • Executes dropped EXE
            • Adds Run key to start application
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2088
            • C:\Windows\SysWOW64\netsh.exe
              netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
              5⤵
                PID:4092

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67.exe.log
        MD5

        339dbc49ea5c332f15f4ead32d70d878

        SHA1

        40f169d604bf2a4e4eb2f432e3ebe0156ae8a777

        SHA256

        4f51a0b25879f156888beec5c7a451bd6471b915c022ccd1d4caecf410784fd3

        SHA512

        8739751b450dd669b599d50b54b04a3c835760f9456c2ac683be5331993f04bd9528a603f8cecfdfe18a1d1ddacd9b15bad84259b4ae42f77918df66eb5b5354

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\server.exe.log
        MD5

        339dbc49ea5c332f15f4ead32d70d878

        SHA1

        40f169d604bf2a4e4eb2f432e3ebe0156ae8a777

        SHA256

        4f51a0b25879f156888beec5c7a451bd6471b915c022ccd1d4caecf410784fd3

        SHA512

        8739751b450dd669b599d50b54b04a3c835760f9456c2ac683be5331993f04bd9528a603f8cecfdfe18a1d1ddacd9b15bad84259b4ae42f77918df66eb5b5354

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

        359a08045b66fe5f71fde43f9a6db01b

        SHA1

        4580e9f5becff35c4c4e773931d18f2df166d9fc

        SHA256

        3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67

        SHA512

        81b120f81da9b442cb008093b54893d44dad911caffc1008c7de792e1420e1bedc15deb616f745e807410f47db3c049a316a77ffe42bef6959359f39af841683

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

        359a08045b66fe5f71fde43f9a6db01b

        SHA1

        4580e9f5becff35c4c4e773931d18f2df166d9fc

        SHA256

        3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67

        SHA512

        81b120f81da9b442cb008093b54893d44dad911caffc1008c7de792e1420e1bedc15deb616f745e807410f47db3c049a316a77ffe42bef6959359f39af841683

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

        359a08045b66fe5f71fde43f9a6db01b

        SHA1

        4580e9f5becff35c4c4e773931d18f2df166d9fc

        SHA256

        3de70e8b308469f55fafddb2e107d3ae908005e1445eb5d1b09a7ff690f62c67

        SHA512

        81b120f81da9b442cb008093b54893d44dad911caffc1008c7de792e1420e1bedc15deb616f745e807410f47db3c049a316a77ffe42bef6959359f39af841683

      • memory/8-117-0x0000000002AA0000-0x0000000002AA1000-memory.dmp
        Filesize

        4KB

      • memory/8-116-0x000000000040747E-mapping.dmp
      • memory/8-115-0x0000000000400000-0x000000000040C000-memory.dmp
        Filesize

        48KB

      • memory/1096-114-0x0000000001140000-0x0000000001141000-memory.dmp
        Filesize

        4KB

      • memory/1440-118-0x0000000000000000-mapping.dmp
      • memory/1440-126-0x00000000033D0000-0x00000000033D1000-memory.dmp
        Filesize

        4KB

      • memory/2088-123-0x000000000040747E-mapping.dmp
      • memory/2088-127-0x0000000003020000-0x0000000003021000-memory.dmp
        Filesize

        4KB

      • memory/4092-128-0x0000000000000000-mapping.dmp