Analysis
- max time kernel
30s - max time network
5s - platform
windows11-21h2_x64 - resource
win11-20251015-en - resource tags
- submitted
10/12/2025, 05:17
Errors
General
- Target 2025-12-10_d9abd9afa2135f84a362485743c61465_babuk_elex_mailto.exe
- Size 95KB
- Sample251210-fy3vdstrd1
- SHA256 ec338b1578293293bfb0d0eae474944b0b3d0327a9808a24cab1e7b55941ee07
Malware Config
Extracted
-
C:\Recovery\WindowsRE\B0A69-Readme.txt
-
netwalker
- Hi! Your files are encrypted. All encrypted files for this computer has extension: .b0a69 -- If for some reason you read this text before the encryption ended, this can be understood by the fact that the computer slows down, and your heart rate has increased due to the ability to turn it off, then we recommend that you move away from the computer and accept that you have been compromised, rebooting/shutdown will cause you to lose files without the possibility of recovery and even god will not be able to help you, it could be files on the network belonging to other users, sure you want to take that responsibility? -- Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help. The only way to get your files back is to cooperate with us and get the decrypter program. Do not try to recover your files without a decrypt program, you may damage them and then they will be impossible to recover. We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned. For us this is just business and to prove to you our seriousness, we will decrypt you some files for free, but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision. Contact us: [email protected] [email protected] Don't forget to include your code in the email: {code_1b1ea859_b0a69: 7+KQAHY/pEleB8QPizyujehqtrUONz0SAhhpu2LPDyYwzUjDjU D6Q2fLpV4a4QFi6lZkfDidCx5S5p2mn5F+tfWrHLjq9QYaWage G9LiCQZeMoWSio/U1tWNP7UeGMk5pnL271SI7kDbB0Q8AOHlca wK3yYhR3m54a7bHYQa1SfRblmYJkyI4683/+apV584MkIJGwj1 s8TdVG5pATBvsmbWqur78CVzI1UrK9XHZ/gDjm1Y9OZdbtmGlr S9spvJe54dcPLp9tFO0epvkM6C/nFFHDQ=}
Signatures
- Detected Netwalker Ransomware 64 IoCs
Detected unpacked Netwalker executable.
- Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
- Netwalker family
- Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
- Deletes itself 1 IoCs
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 2 IoCs
- Drops file in Program Files directory 13 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Interacts with shadow copies 3 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: MapViewOfSection 4 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\2025-12-10_d9abd9afa2135f84a362485743c61465_babuk_elex_mailto.exe"C:\Users\Admin\AppData\Local\Temp\2025-12-10_d9abd9afa2135f84a362485743c61465_babuk_elex_mailto.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"2⤵
- Deletes itself
- Adds Run key to start application
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
-
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-
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
-
C:\Program Files (x86)\b0a69071\b0a69071.exe"C:\Program Files (x86)\b0a69071\b0a69071.exe"1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
133.0.3065.69.manifest
b0a69071.exe
Manifest.xml
B0A69-Readme.txt
memory/2224-9-0x0000000000980000-0x000000000099B000-memory.dmp
memory/2444-2-0x00000000004F0000-0x000000000050B000-memory.dmp
memory/2444-3-0x00000000004F0000-0x000000000050B000-memory.dmp
memory/2832-57-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-49-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-14-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-19-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-24-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-42-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-79-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-78-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-77-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-76-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-75-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-73-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-72-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-71-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-70-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-69-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-68-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-67-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-66-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-65-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-64-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-63-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-62-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-61-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-60-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-59-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-58-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-13-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-56-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-54-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-15-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-53-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-40-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-52-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-48-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-47-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-46-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-44-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-43-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-41-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-50-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-38-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-37-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-36-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-35-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-33-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-32-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-31-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-30-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-29-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-74-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-28-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-51-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-26-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-45-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-23-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-22-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-21-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-20-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-27-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-18-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-17-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-0-0x00000000008C0000-0x00000000008DB000-memory.dmp
memory/2832-16-0x00000000008C0000-0x00000000008DB000-memory.dmp