Overview

overview

10

Static

static

10

chocolate_nowin.exe

windows7-x64

10

chocolate_nowin.exe

windows10-1703-x64

10

chocolate_nowin.exe

windows10-2004-x64

10

chocolate_nowin.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    1796s
  • max time network
    1548s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-12-2023 02:35

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General

  • Target

    chocolate_nowin.exe

  • Size

    42KB

  • MD5

    c3eb80e8aa150aa10b82a5975c17a116

  • SHA1

    3d8e7c04891606b47c27e8225c27f385de3100e5

  • SHA256

    92cc252d8eebc2d64aaf63f383eb549e46d115409ec2d537a3ff935b3f1ff40b

  • SHA512

    b676cfef912f24aa2e96ca2bc0b73e808702450f1d4439498f0ccd53248f4b6d88fa753d09e155da5d08bf3d77d794c36a16678774402f327263a3175c5e520d

  • SSDEEP

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

Score
10/10
ransomwarespywarestealer

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 (11238) 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
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 3 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • 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.

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • 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 35 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 17 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\chocolate_nowin.exe
    "C:\Users\Admin\AppData\Local\Temp\chocolate_nowin.exe"
    1⤵
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4444
    • C:\Users\Admin\AppData\Local\Temp\chocolate_nowin.exe
      "C:\Users\Admin\AppData\Local\Temp\chocolate_nowin.exe" n4444
      2⤵
        PID:3988
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4692
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:4140
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:1472
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1808
      • 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\chocolate_nowin.exe" & del /q /f "C:\Users\Admin\AppData\Local\Temp\chocolate_nowin.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3876
        • C:\Windows\SysWOW64\PING.EXE
          ping 1.1.1.1 -n 5
          3⤵
          • Runs ping.exe
          PID:4608
        • C:\Windows\SysWOW64\fsutil.exe
          fsutil file setZeroData offset=0 length=131072 "C:\Users\Admin\AppData\Local\Temp\chocolate_nowin.exe"
          3⤵
            PID:536
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1880
      • C:\Windows\system32\wbengine.exe
        "C:\Windows\system32\wbengine.exe"
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:224
      • C:\Windows\System32\vdsldr.exe
        C:\Windows\System32\vdsldr.exe -Embedding
        1⤵
          PID:4752
        • C:\Windows\System32\vds.exe
          C:\Windows\System32\vds.exe
          1⤵
          • Checks SCSI registry key(s)
          PID:3004
        • 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
          • Checks processor information in registry
          • Enumerates system info in registry
          • Modifies data under HKEY_USERS
          • Suspicious use of SetWindowsHookEx
          PID:3668

        Network

        MITRE ATT&CK Enterprise v15

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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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