Analysis

  • max time kernel
    187s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    24-11-2022 10:08

General

  • Target

    b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a.exe

  • Size

    43KB

  • MD5

    75afc3968269546056e089311e6a6e25

  • SHA1

    17df0b061d5c744de710300ae8c2e7fbbca89d7e

  • SHA256

    b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a

  • SHA512

    2907f103fd0cfc0ef0d1476ea636dc0056ebe02f1af38e1ebd23cadab1d7776e438281ab1da23a4bfc869ca3c743c01833b50c9b2aca16b27086503c903e5133

  • SSDEEP

    768:5S3DZ8y9MHnS6SgfSre9WTZ2S15M1N6HUjHPSqvtK1YrMr1PTENpaXsHCCjPkaE6:m6WEpo81W1bEjHCCrk

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • 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 behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a.exe
    "C:\Users\Admin\AppData\Local\Temp\b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Users\Admin\AppData\Local\Temp\thebest.exe
      "C:\Users\Admin\AppData\Local\Temp\thebest.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1012
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\thebest.exe" "thebest.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:584

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\thebest.exe
    Filesize

    43KB

    MD5

    75afc3968269546056e089311e6a6e25

    SHA1

    17df0b061d5c744de710300ae8c2e7fbbca89d7e

    SHA256

    b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a

    SHA512

    2907f103fd0cfc0ef0d1476ea636dc0056ebe02f1af38e1ebd23cadab1d7776e438281ab1da23a4bfc869ca3c743c01833b50c9b2aca16b27086503c903e5133

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

    43KB

    MD5

    75afc3968269546056e089311e6a6e25

    SHA1

    17df0b061d5c744de710300ae8c2e7fbbca89d7e

    SHA256

    b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a

    SHA512

    2907f103fd0cfc0ef0d1476ea636dc0056ebe02f1af38e1ebd23cadab1d7776e438281ab1da23a4bfc869ca3c743c01833b50c9b2aca16b27086503c903e5133

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

    43KB

    MD5

    75afc3968269546056e089311e6a6e25

    SHA1

    17df0b061d5c744de710300ae8c2e7fbbca89d7e

    SHA256

    b08aa1d63497dc690d0cd2baab0770457f6e28267a454a4fb860540979d6158a

    SHA512

    2907f103fd0cfc0ef0d1476ea636dc0056ebe02f1af38e1ebd23cadab1d7776e438281ab1da23a4bfc869ca3c743c01833b50c9b2aca16b27086503c903e5133

  • memory/584-60-0x0000000000000000-mapping.dmp
  • memory/1012-56-0x0000000000000000-mapping.dmp
  • memory/1012-62-0x0000000074A60000-0x000000007500B000-memory.dmp
    Filesize

    5.7MB

  • memory/1012-64-0x0000000074A60000-0x000000007500B000-memory.dmp
    Filesize

    5.7MB

  • memory/2012-54-0x00000000767F1000-0x00000000767F3000-memory.dmp
    Filesize

    8KB

  • memory/2012-61-0x0000000074A60000-0x000000007500B000-memory.dmp
    Filesize

    5.7MB