Analysis

  • max time kernel
    151s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    26-11-2020 08:33

General

  • Target

    HFHHzjDb.exe

  • Size

    23KB

  • MD5

    e46af2bdd1dce6e3057ed0620e9258e9

  • SHA1

    6da0c9a047e7525624d75eab49f2805fd8d1c9b5

  • SHA256

    20c49b95bdc74a3525446fdc3ccb4c8aa81146bb3455a567d547f3ad3150930a

  • SHA512

    6c77386418eecaf28869dbc4610cebdd6e9960c1064fd4bd272db63c1b31d3187e64dc763a1417f6cbc3eb6cf0c17b7db0440c12124a360466384790fdf346f4

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed by ayouboto

C2

frifra.myq-see.com:5552

Mutex

9f7aaf2b008e1c7912a43cef67198b0a

Attributes
  • reg_key

    9f7aaf2b008e1c7912a43cef67198b0a

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HFHHzjDb.exe
    "C:\Users\Admin\AppData\Local\Temp\HFHHzjDb.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:752
    • 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:1292
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
          PID:1576

    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\Temp\server.exe
      MD5

      e46af2bdd1dce6e3057ed0620e9258e9

      SHA1

      6da0c9a047e7525624d75eab49f2805fd8d1c9b5

      SHA256

      20c49b95bdc74a3525446fdc3ccb4c8aa81146bb3455a567d547f3ad3150930a

      SHA512

      6c77386418eecaf28869dbc4610cebdd6e9960c1064fd4bd272db63c1b31d3187e64dc763a1417f6cbc3eb6cf0c17b7db0440c12124a360466384790fdf346f4

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

      e46af2bdd1dce6e3057ed0620e9258e9

      SHA1

      6da0c9a047e7525624d75eab49f2805fd8d1c9b5

      SHA256

      20c49b95bdc74a3525446fdc3ccb4c8aa81146bb3455a567d547f3ad3150930a

      SHA512

      6c77386418eecaf28869dbc4610cebdd6e9960c1064fd4bd272db63c1b31d3187e64dc763a1417f6cbc3eb6cf0c17b7db0440c12124a360466384790fdf346f4

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

      e46af2bdd1dce6e3057ed0620e9258e9

      SHA1

      6da0c9a047e7525624d75eab49f2805fd8d1c9b5

      SHA256

      20c49b95bdc74a3525446fdc3ccb4c8aa81146bb3455a567d547f3ad3150930a

      SHA512

      6c77386418eecaf28869dbc4610cebdd6e9960c1064fd4bd272db63c1b31d3187e64dc763a1417f6cbc3eb6cf0c17b7db0440c12124a360466384790fdf346f4

    • memory/1292-1-0x0000000000000000-mapping.dmp
    • memory/1576-4-0x0000000000000000-mapping.dmp