Analysis

  • max time kernel
    152s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    30-10-2022 07:15

General

  • Target

    fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4.exe

  • Size

    131KB

  • MD5

    93c3392b91669a01cceb599296c3c2b0

  • SHA1

    fbe8bae801d725dc2d40ce680e14f5b34a5737be

  • SHA256

    fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4

  • SHA512

    ef4b685c6c75f4f68c49a5ee119576cdec7b4a5abba61d2bca333be18225ac08da6ca8edf91e1bd5fd0fbede4b10b688b53b98a5b26bed7639a71a0a1332a610

  • SSDEEP

    3072:O/fCCPsG9etK87u1JdYVU10PIutREBO9qYDHa4rCcBM2v:OjP2KEhUWPIuPEOAYD64xf

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

yahoo

C2

127.0.0.1:5552

Mutex

c20dc55207710c29d1db3ad3160138a1

Attributes
  • reg_key

    c20dc55207710c29d1db3ad3160138a1

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

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

  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4.exe
    "C:\Users\Admin\AppData\Local\Temp\fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1520
    • C:\Users\Admin\AppData\Local\Temp\yahoo.exe
      "C:\Users\Admin\AppData\Local\Temp\yahoo.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\yahoo.exe" "yahoo.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1924

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Modify Existing Service

1
T1031

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\yahoo.exe
    Filesize

    131KB

    MD5

    93c3392b91669a01cceb599296c3c2b0

    SHA1

    fbe8bae801d725dc2d40ce680e14f5b34a5737be

    SHA256

    fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4

    SHA512

    ef4b685c6c75f4f68c49a5ee119576cdec7b4a5abba61d2bca333be18225ac08da6ca8edf91e1bd5fd0fbede4b10b688b53b98a5b26bed7639a71a0a1332a610

  • C:\Users\Admin\AppData\Local\Temp\yahoo.exe
    Filesize

    131KB

    MD5

    93c3392b91669a01cceb599296c3c2b0

    SHA1

    fbe8bae801d725dc2d40ce680e14f5b34a5737be

    SHA256

    fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4

    SHA512

    ef4b685c6c75f4f68c49a5ee119576cdec7b4a5abba61d2bca333be18225ac08da6ca8edf91e1bd5fd0fbede4b10b688b53b98a5b26bed7639a71a0a1332a610

  • \Users\Admin\AppData\Local\Temp\yahoo.exe
    Filesize

    131KB

    MD5

    93c3392b91669a01cceb599296c3c2b0

    SHA1

    fbe8bae801d725dc2d40ce680e14f5b34a5737be

    SHA256

    fe416e3b6b814dc3a5dc24e6f29f7f6f3aa44654a69f40a3212c96826d182cd4

    SHA512

    ef4b685c6c75f4f68c49a5ee119576cdec7b4a5abba61d2bca333be18225ac08da6ca8edf91e1bd5fd0fbede4b10b688b53b98a5b26bed7639a71a0a1332a610

  • memory/1520-54-0x0000000000210000-0x0000000000236000-memory.dmp
    Filesize

    152KB

  • memory/1520-55-0x0000000000490000-0x00000000004A2000-memory.dmp
    Filesize

    72KB

  • memory/1520-56-0x0000000074D61000-0x0000000074D63000-memory.dmp
    Filesize

    8KB

  • memory/1520-57-0x0000000001D10000-0x0000000001D38000-memory.dmp
    Filesize

    160KB

  • memory/1520-58-0x0000000000580000-0x000000000058C000-memory.dmp
    Filesize

    48KB

  • memory/1724-60-0x0000000000000000-mapping.dmp
  • memory/1724-63-0x0000000000150000-0x0000000000176000-memory.dmp
    Filesize

    152KB

  • memory/1924-65-0x0000000000000000-mapping.dmp