Resubmissions

27-04-2021 15:25

210427-nlva9ev87e 8

27-04-2021 14:03

210427-vj2ehadz4s 8

Analysis

  • max time kernel
    95s
  • max time network
    132s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-04-2021 14:03

General

  • Target

    92190c9789485a0d96bced7040080f0ae35c02898c3d31a65d50ecd659b80f09.bin.exe

  • Size

    61KB

  • MD5

    077fccc46159f8ccd79fcd50787db1c9

  • SHA1

    288635e27276ba6da3291d0982a8f0f23ae0065e

  • SHA256

    92190c9789485a0d96bced7040080f0ae35c02898c3d31a65d50ecd659b80f09

  • SHA512

    6028a1b66ea3e6baae6c11005596c6a6fff982d132ad23c502bf57c5d0995829f983963ba451142f2780214da6c8588e8f83b2972d289367300094fee9cebe74

Malware Config

Signatures

  • Modifies extensions of user files 10 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\92190c9789485a0d96bced7040080f0ae35c02898c3d31a65d50ecd659b80f09.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\92190c9789485a0d96bced7040080f0ae35c02898c3d31a65d50ecd659b80f09.bin.exe"
    1⤵
    • Modifies extensions of user files
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:792
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1956
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2012

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Impact

Defacement

1
T1491

Replay Monitor

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Downloads

  • memory/792-60-0x0000000000900000-0x0000000000901000-memory.dmp
    Filesize

    4KB

  • memory/792-62-0x0000000075041000-0x0000000075043000-memory.dmp
    Filesize

    8KB

  • memory/792-65-0x00000000003D0000-0x00000000003D1000-memory.dmp
    Filesize

    4KB

  • memory/792-66-0x00000000003D5000-0x00000000003E6000-memory.dmp
    Filesize

    68KB

  • memory/1956-63-0x0000000000000000-mapping.dmp
  • memory/2012-64-0x0000000000000000-mapping.dmp