Analysis
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max time kernel
93s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
22-01-2025 20:28
Behavioral task
behavioral1
Sample
2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe
Resource
win10v2004-20241007-en
General
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Target
2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe
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Size
82KB
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MD5
12448b9b16e1c3a907f669ff5906046d
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SHA1
264a5f682001eae793103023f35b0a865b48d25b
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SHA256
d68ec0df2b057387bbd78a51054f7c06bdf029337bf9d66c1d411ba0243b2ae5
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SHA512
58870722418a14fbc86062979b8b93fc9aa31848b03217fc7534b6bd9d03383de5ad338cd75376f8bbee378f38d5e473364429cf8bc631a5125e5e65314b7be3
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SSDEEP
1536:yoF+QbXFzvL4ZwxY/ic0ty2XGf0s7pBZWNFMSZs1:yiFF7Loxt0tyAGf0sN5S2
Malware Config
Extracted
C:\Users\Admin\Favorites\24FE-Readme.txt
netwalker
Signatures
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Detected Netwalker Ransomware 64 IoCs
Detected unpacked Netwalker executable.
resource yara_rule behavioral2/memory/5032-0-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-2-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-3-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-4-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-26-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-36-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-65-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-64-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-63-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-62-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/1220-476-0x0000000000130000-0x0000000000149000-memory.dmp netwalker_ransomware behavioral2/memory/5032-61-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-60-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-59-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-58-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-57-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-56-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-55-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-54-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-53-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-52-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-51-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-50-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-49-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-48-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-47-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-46-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-45-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-44-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-43-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-42-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-41-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-40-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-39-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-35-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-34-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-32-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-31-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-30-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-38-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-28-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-25-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-24-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-23-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-22-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-21-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-20-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-19-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-18-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-17-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-16-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-15-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-14-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-13-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-12-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-11-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-10-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-9-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-8-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-7-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-6-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-27-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-5-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware behavioral2/memory/5032-1836-0x0000000001280000-0x0000000001299000-memory.dmp netwalker_ransomware -
Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
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Netwalker family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (183) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Deletes itself 1 IoCs
pid Process 5032 explorer.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\24fefb11 = "C:\\Program Files (x86)\\24fefb11\\24fefb11.exe" explorer.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1876 set thread context of 5032 1876 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 83 -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files (x86)\24fefb11\24fefb11.exe explorer.exe File opened for modification C:\Program Files (x86)\24fefb11\24fefb11.exe explorer.exe -
System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language explorer.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language notepad.exe -
Interacts with shadow copies 3 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 3092 vssadmin.exe 3968 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 5032 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe 1220 explorer.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 1876 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 5032 explorer.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1220 explorer.exe Token: SeBackupPrivilege 2752 vssvc.exe Token: SeRestorePrivilege 2752 vssvc.exe Token: SeAuditPrivilege 2752 vssvc.exe -
Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 1876 wrote to memory of 5032 1876 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 83 PID 1876 wrote to memory of 5032 1876 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 83 PID 1876 wrote to memory of 5032 1876 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 83 PID 5032 wrote to memory of 1220 5032 explorer.exe 84 PID 5032 wrote to memory of 1220 5032 explorer.exe 84 PID 5032 wrote to memory of 1220 5032 explorer.exe 84 PID 1220 wrote to memory of 3092 1220 explorer.exe 85 PID 1220 wrote to memory of 3092 1220 explorer.exe 85 PID 5032 wrote to memory of 3224 5032 explorer.exe 102 PID 5032 wrote to memory of 3224 5032 explorer.exe 102 PID 5032 wrote to memory of 3224 5032 explorer.exe 102 PID 5032 wrote to memory of 3968 5032 explorer.exe 103 PID 5032 wrote to memory of 3968 5032 explorer.exe 103 -
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe"C:\Users\Admin\AppData\Local\Temp\2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1876 -
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 WriteProcessMemory
PID:5032 -
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
PID:1220 -
C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:3092
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C:\Windows\SysWOW64\notepad.exeC:\Windows\system32\notepad.exe C:\Users\Admin\Desktop\24FE-Readme.txt3⤵
- System Location Discovery: System Language Discovery
PID:3224
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C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:3968
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2752
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD511da42e76b4facd63cd2c1247533a0a6
SHA13b75b7bfa10845b8fea36ad17312f33de5251eb4
SHA256c7835f383b1d647d1fb2e028bc10277f4af16fcdd336413a6d8ff96f89348049
SHA5121156047f7707b65bd484ac56a0ec7fd43e34ccfd0ab5164be190baa30afe4306ad56209ac3e7526adb0e5af4786cf91ace13e8ee4dce9a52a9292e77d4708564