Resubmissions

22-09-2021 03:40

210922-d8nr4sbad5 10

20-09-2021 08:58

210920-kxhv2sdec5 10

08-08-2021 11:12

210808-6klsp4qpxn 10

Analysis

  • max time kernel
    120s
  • max time network
    189s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    08-08-2021 11:12

General

  • Target

    eufive_20210808-125605.exe

  • Size

    325KB

  • MD5

    94b43aaf8dd6506835fd99917a412b9f

  • SHA1

    17eb10f6f986eff21f49586b06e844784ab66dab

  • SHA256

    53b9a0465f0f42c412ba90058ed129e7e6c4c97f724f537a7e03c9931c8bbc60

  • SHA512

    614cd22f7ac4afa103a8995dbb30ae83f48156ba7759ab402e9929dcc7033c793b1aac6108ca8a29973ed552507f7e98a884000392c46137c9fdf183ade96797

Malware Config

Signatures

  • Generic Chinese Botnet

    A botnet originating from China which is currently unnamed publicly.

  • Chinese Botnet Payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 49 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eufive_20210808-125605.exe
    "C:\Users\Admin\AppData\Local\Temp\eufive_20210808-125605.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    PID:1032
  • C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe
    "C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe"
    1⤵
    • Executes dropped EXE
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe
      "C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe" Win7
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Modifies data under HKEY_USERS
      • Suspicious use of SetWindowsHookEx
      PID:340

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe

    MD5

    94b43aaf8dd6506835fd99917a412b9f

    SHA1

    17eb10f6f986eff21f49586b06e844784ab66dab

    SHA256

    53b9a0465f0f42c412ba90058ed129e7e6c4c97f724f537a7e03c9931c8bbc60

    SHA512

    614cd22f7ac4afa103a8995dbb30ae83f48156ba7759ab402e9929dcc7033c793b1aac6108ca8a29973ed552507f7e98a884000392c46137c9fdf183ade96797

  • C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe

    MD5

    94b43aaf8dd6506835fd99917a412b9f

    SHA1

    17eb10f6f986eff21f49586b06e844784ab66dab

    SHA256

    53b9a0465f0f42c412ba90058ed129e7e6c4c97f724f537a7e03c9931c8bbc60

    SHA512

    614cd22f7ac4afa103a8995dbb30ae83f48156ba7759ab402e9929dcc7033c793b1aac6108ca8a29973ed552507f7e98a884000392c46137c9fdf183ade96797

  • C:\Program Files (x86)\Microsoft Egkgcm\Wakkeos.exe

    MD5

    94b43aaf8dd6506835fd99917a412b9f

    SHA1

    17eb10f6f986eff21f49586b06e844784ab66dab

    SHA256

    53b9a0465f0f42c412ba90058ed129e7e6c4c97f724f537a7e03c9931c8bbc60

    SHA512

    614cd22f7ac4afa103a8995dbb30ae83f48156ba7759ab402e9929dcc7033c793b1aac6108ca8a29973ed552507f7e98a884000392c46137c9fdf183ade96797

  • memory/340-71-0x0000000000000000-mapping.dmp

  • memory/340-76-0x0000000000400000-0x0000000002C87000-memory.dmp

    Filesize

    40.5MB

  • memory/1032-60-0x0000000000310000-0x00000000003CC000-memory.dmp

    Filesize

    752KB

  • memory/1032-61-0x0000000000400000-0x0000000002C87000-memory.dmp

    Filesize

    40.5MB

  • memory/1032-62-0x0000000075591000-0x0000000075593000-memory.dmp

    Filesize

    8KB

  • memory/1032-63-0x0000000010000000-0x0000000010018000-memory.dmp

    Filesize

    96KB

  • memory/1832-66-0x0000000000400000-0x0000000002C87000-memory.dmp

    Filesize

    40.5MB