Overview

overview

10

Static

static

10

2023-12-24...op.exe

windows7-x64

10

2023-12-24...op.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    13s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-12-2023 17:59

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General

  • Target

    2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe

  • Size

    42KB

  • MD5

    c3eb80e8aa150aa10b82a5975c17a116

  • SHA1

    3d8e7c04891606b47c27e8225c27f385de3100e5

  • SHA256

    92cc252d8eebc2d64aaf63f383eb549e46d115409ec2d537a3ff935b3f1ff40b

  • SHA512

    b676cfef912f24aa2e96ca2bc0b73e808702450f1d4439498f0ccd53248f4b6d88fa753d09e155da5d08bf3d77d794c36a16678774402f327263a3175c5e520d

  • SSDEEP

    768:5O1oR/fVS1RzK4wbs+D/SIJX+ZZ1SQQwZuIOPzDX5aBd69O59GKbup7IU5F:5FS1FKnDtkuImX4jHGKbj8

Score
10/10
ransomware

Malware Config

Extracted

Path

C:\Program Files\7-Zip\+README-WARNING+.txt

Ransom Note
::: Greetings ChocVM ::: Little FAQ: .1. Q: Whats Happen? A: Your files have been encrypted. The file structure was not damaged, we did everything possible so that this could not happen. .2. Q: How to recover files? A: If you wish to decrypt your files you will need to pay us. .3. Q: What about guarantees? A: Its just a business. We absolutely do not care about you and your deals, except getting benefits. If we do not do our work and liabilities - nobody will cooperate with us. Its not in our interests. To check the ability of returning files, you can send to us any 2 files with SIMPLE extensions(jpg,xls,doc, etc... not databases!) and low sizes(max 1 mb), we will decrypt them and send back to you. That is our guarantee. .4. Q: How to contact with you? A: You can write us to our mailboxes: [email protected] or [email protected] .5. Q: How will the decryption process proceed after payment? A: After payment we will send to you our scanner-decoder program and detailed instructions for use. With this program you will be able to decrypt all your encrypted files. .6. Q: If I don�t want to pay bad people like you? A: If you will not cooperate with our service - for us, its does not matter. But you will lose your time and data, cause only we have the private key. In practice - time is much more valuable than money. :::BEWARE::: DON'T try to change encrypted files by yourself! If you will try to use any third party software for restoring your data or antivirus solutions - please make a backup for all encrypted files! Any changes in encrypted files may entail damage of the private key and, as result, the loss all data.

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Renames multiple (1361) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 3 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

    ransomware
  • Modifies data under HKEY_USERS 64 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe
    "C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3448
    • C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe
      "C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe" n3448
      2⤵
        PID:1700
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:764
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ping 1.1.1.1 -n 5 & fsutil file setZeroData offset=0 length=131072 "C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe" & del /q /f "C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe"
        2⤵
          PID:2600
          • C:\Windows\SysWOW64\fsutil.exe
            fsutil file setZeroData offset=0 length=131072 "C:\Users\Admin\AppData\Local\Temp\2023-12-24_c3eb80e8aa150aa10b82a5975c17a116_makop.exe"
            3⤵
              PID:4476
        • C:\Windows\system32\vssvc.exe
          C:\Windows\system32\vssvc.exe
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:224
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          1⤵
          • Interacts with shadow copies
          PID:2036
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          1⤵
          • Deletes backup catalog
          PID:4600
        • C:\Windows\system32\wbengine.exe
          "C:\Windows\system32\wbengine.exe"
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2712
        • C:\Windows\System32\vds.exe
          C:\Windows\System32\vds.exe
          1⤵
          • Checks SCSI registry key(s)
          PID:2968
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1072
        • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
          "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
          1⤵
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          • Suspicious use of SetWindowsHookEx
          PID:1324
        • C:\Windows\System32\vdsldr.exe
          C:\Windows\System32\vdsldr.exe -Embedding
          1⤵
            PID:2888
          • C:\Windows\SysWOW64\PING.EXE
            ping 1.1.1.1 -n 5
            1⤵
            • Runs ping.exe
            PID:1868

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\7-Zip\+README-WARNING+.txt
            Filesize

            1KB

            MD5

            19a625ff7fbf27805327d707e9bb5521

            SHA1

            f5d343259742dffbeb11c7df95217cd12213d537

            SHA256

            0c8362e1cedf4779f508902f6826fdb86fd0560afb91d788079e1652830adc58

            SHA512

            d9eca003da692c475063f80640fbb12df8c17f5fa033bc381de6d4801b8e26c8f8a19d2554ff19e7a76b1b26bb776f8988bc1e4af7df18bd0965249f7c9cb967

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