Analysis

  • max time kernel
    125s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    18-05-2024 21:10

General

  • Target

    2024-05-18_82ba4743722a3621169dd7a3a67a3413_bkransomware.exe

  • Size

    524KB

  • MD5

    82ba4743722a3621169dd7a3a67a3413

  • SHA1

    3d5ccc769f9e2a9204fe9e5e349ad67f28613ec4

  • SHA256

    f5d566a3c303e7c21c4c3ce40591befc2695c32dd4b26e99dd4116ba66840677

  • SHA512

    d9ba7c82129ac5f448bbb154f323e4d34ea6fe4ac56352d08aa1b627cf1aaf552fd44eaded9a31d17e487a26002d29a84ad2a8db182cc54fc63f612af556c5c5

  • SSDEEP

    6144:IoyZmTAsfJFakxaLjcMkc0Cax1PXGp6bYA0w601+dNT9/0626ASkVOAFl6IZBBRR:IoyIJsMPrPWp6bYboEdNK6IZB1LT

Malware Config

Extracted

Family

sality

C2

http://89.119.67.154/testo5/

http://kukutrustnet777.info/home.gif

http://kukutrustnet888.info/home.gif

http://kukutrustnet987.info/home.gif

Signatures

  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Sality

    Sality is backdoor written in C++, first discovered in 2003.

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 6 IoCs
  • Detects executables packed with Sality Polymorphic Code Generator or Simple Poly Engine or Sality 31 IoCs
  • UPX dump on OEP (original entry point) 31 IoCs
  • UPX packed file 31 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Windows security modification 2 TTPs 7 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 21 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops autorun.inf file 1 TTPs 2 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 32 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
      PID:1128
    • C:\Windows\system32\Dwm.exe
      "C:\Windows\system32\Dwm.exe"
      1⤵
        PID:1172
      • C:\Windows\Explorer.EXE
        C:\Windows\Explorer.EXE
        1⤵
          PID:1204
          • C:\Users\Admin\AppData\Local\Temp\2024-05-18_82ba4743722a3621169dd7a3a67a3413_bkransomware.exe
            "C:\Users\Admin\AppData\Local\Temp\2024-05-18_82ba4743722a3621169dd7a3a67a3413_bkransomware.exe"
            2⤵
            • Modifies firewall policy service
            • UAC bypass
            • Windows security bypass
            • Windows security modification
            • Checks whether UAC is enabled
            • Enumerates connected drives
            • Drops autorun.inf file
            • Drops file in Program Files directory
            • Drops file in Windows directory
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            • System policy modification
            PID:3008
        • C:\Windows\system32\DllHost.exe
          C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
          1⤵
            PID:2248

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • F:\tbqwio.pif

            Filesize

            97KB

            MD5

            8c39f3df6dcf2f33071e7c846ef0ab63

            SHA1

            5e1828500db549b4c4d3e0900dd35b85e2ea068b

            SHA256

            b8371d1365c9478228bbaacf0023ff658e8231bd9bea17ffd483649c8aa8b77b

            SHA512

            78998c71ca01a633548b3b4f34f7dce1892e71bee882d69546c4a03b2d0883808a0fadf106ad1b8a64b8fecd92d359bc3d0dc5843777488570ecea66878ad520

          • memory/1128-17-0x00000000020F0000-0x00000000020F2000-memory.dmp

            Filesize

            8KB

          • memory/3008-36-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-98-0x00000000003E0000-0x00000000003E2000-memory.dmp

            Filesize

            8KB

          • memory/3008-7-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-6-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-32-0x00000000003E0000-0x00000000003E2000-memory.dmp

            Filesize

            8KB

          • memory/3008-29-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-31-0x00000000003E0000-0x00000000003E2000-memory.dmp

            Filesize

            8KB

          • memory/3008-11-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-0-0x0000000000400000-0x0000000000488000-memory.dmp

            Filesize

            544KB

          • memory/3008-8-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-26-0x00000000003F0000-0x00000000003F1000-memory.dmp

            Filesize

            4KB

          • memory/3008-25-0x00000000003E0000-0x00000000003E2000-memory.dmp

            Filesize

            8KB

          • memory/3008-4-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-15-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-16-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-33-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-34-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-35-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-30-0x00000000003F0000-0x00000000003F1000-memory.dmp

            Filesize

            4KB

          • memory/3008-5-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-52-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-40-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-41-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-44-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-45-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-39-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-54-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-56-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-60-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-64-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-66-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-67-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-69-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-71-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-74-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-75-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-37-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB

          • memory/3008-2-0x0000000001F00000-0x0000000002FBA000-memory.dmp

            Filesize

            16.7MB