Overview

overview

10

Static

static

enc.exe

windows7_x64

9

enc.exe

windows10-2004_x64

10

Resubmissions

29/06/2022, 11:24

220629-nh7seahbap 10

29/06/2022, 10:55

220629-m1cvbaghfq 10

Analysis

  • max time kernel
    141s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    29/06/2022, 10:55

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General

  • Target

    enc.exe

  • Size

    7.7MB

  • MD5

    a7ab0969bf6641cd0c7228ae95f6d217

  • SHA1

    002971b6d178698bf7930b5b89c201750d80a07e

  • SHA256

    117fc30c25b1f28cd923b530ab9f91a0a818925b0b89b8bc9a7f820a9e630464

  • SHA512

    7e1cce428e3b80b60635c354801af6e86354c9437ba7a661ca6a922c17057a16439a97d1ea11873eb359c05018df9eb6040b72fa97b30cf4d04cae56bf052b8a

Score
10/10
persistenceransomware

Malware Config

Extracted

Path

C:\\OnHnnBvUej-RECOVER-README.txt

Ransom Note
-- Agenda Your network/system was encrypted. Encrypted files have new extension. -- Compromising and sensitive data We have downloaded compromising and sensitive data from you system/network If you refuse to communicate with us and we do not come to an agreementyour data will be published. Data includes: - Employees personal dataCVsDLSSN. - Complete network map including credentials for local and remote services. - Financial information including clients databillsbudgetsannual reportsbank statements. - Complete datagrams/schemas/drawings for manufacturing in solidworks format - And more... -- Warning 1) If you modify files - our decrypt software won't able to recover data 2) If you use third party software - you can damage/modify files (see item 1) 3) You need cipher key / our decrypt software to restore you files. 4) The police or authorities will not be able to help you get the cipher key. We encourage you to consider your decisions. -- Recovery 1) Download tor browser: https://www.torproject.org/download/ 2) Go to domain 3) Enter credentials -- Credentials Extension: OnHnnBvUej Domain: login: bd61eb78-64a3-4ee0-9a8e-543b8bc12b5e password: 14158620-fb98-4889-87cb-f5251368fc21%!(EXTRA string=same as login)

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Executes dropped EXE 3 IoCs
  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 64 IoCs

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

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

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

  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1724
    • C:\Users\Public\enc.exe
      "C:\Users\Public\enc.exe"
      2⤵
      • Executes dropped EXE
      • Modifies extensions of user files
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4340
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4008
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2224
    • C:\Users\Public\enc.exe
      "C:\Users\Public\enc.exe"
      2⤵
      • Executes dropped EXE
      • Modifies data under HKEY_USERS
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5056
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4888
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3476
  • C:\Users\Admin\AppData\Local\Temp\enc.exe
    "C:\Users\Admin\AppData\Local\Temp\enc.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2764
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2324
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2924
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4996
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    PID:2076
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s LanmanServer
    1⤵
    • Enumerates connected drives
    • Suspicious use of AdjustPrivilegeToken
    PID:1636

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Public\enc.exe
    Filesize

    7.7MB

    MD5

    a7ab0969bf6641cd0c7228ae95f6d217

    SHA1

    002971b6d178698bf7930b5b89c201750d80a07e

    SHA256

    117fc30c25b1f28cd923b530ab9f91a0a818925b0b89b8bc9a7f820a9e630464

    SHA512

    7e1cce428e3b80b60635c354801af6e86354c9437ba7a661ca6a922c17057a16439a97d1ea11873eb359c05018df9eb6040b72fa97b30cf4d04cae56bf052b8a

    Download Submit

  • C:\Users\Public\enc.exe
    Filesize

    7.7MB

    MD5

    a7ab0969bf6641cd0c7228ae95f6d217

    SHA1

    002971b6d178698bf7930b5b89c201750d80a07e

    SHA256

    117fc30c25b1f28cd923b530ab9f91a0a818925b0b89b8bc9a7f820a9e630464

    SHA512

    7e1cce428e3b80b60635c354801af6e86354c9437ba7a661ca6a922c17057a16439a97d1ea11873eb359c05018df9eb6040b72fa97b30cf4d04cae56bf052b8a

    Download Submit

  • C:\Users\Public\enc.exe
    Filesize

    7.7MB

    MD5

    a7ab0969bf6641cd0c7228ae95f6d217

    SHA1

    002971b6d178698bf7930b5b89c201750d80a07e

    SHA256

    117fc30c25b1f28cd923b530ab9f91a0a818925b0b89b8bc9a7f820a9e630464

    SHA512

    7e1cce428e3b80b60635c354801af6e86354c9437ba7a661ca6a922c17057a16439a97d1ea11873eb359c05018df9eb6040b72fa97b30cf4d04cae56bf052b8a

    Download Submit

  • C:\Users\Public\pwndll.dll
    Filesize

    91KB

    MD5

    e966c38c5b1a05d0bd86eb0edc1d3b84

    SHA1

    f10443e13b82c93f203c0428a357205aa55f2dee

    SHA256

    28aeb2d6576b2437ecab535c0a1bf41713ee9864611965bf1d498a87cbdd2fab

    SHA512

    6c80ec34f0d581e0924cb58f22e5bc70e36fcc6119db779744fad007bd943d95e5f646f06244e9a5aa40685649b7730e46dded68c0732e81559dded33a4dbe7b

    Download Submit

  • C:\Users\Public\pwndll.dll
    Filesize

    91KB

    MD5

    e966c38c5b1a05d0bd86eb0edc1d3b84

    SHA1

    f10443e13b82c93f203c0428a357205aa55f2dee

    SHA256

    28aeb2d6576b2437ecab535c0a1bf41713ee9864611965bf1d498a87cbdd2fab

    SHA512

    6c80ec34f0d581e0924cb58f22e5bc70e36fcc6119db779744fad007bd943d95e5f646f06244e9a5aa40685649b7730e46dded68c0732e81559dded33a4dbe7b

    Download Submit