Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
23/01/2025, 03:29
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\Downloads\E883-Readme.txt
netwalker
Signatures
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Detected Netwalker Ransomware 64 IoCs
Detected unpacked Netwalker executable.
resource yara_rule behavioral2/memory/3068-0-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-2-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-3-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-7-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-6-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-5-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-24-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-28-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-43-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-66-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-65-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-64-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-63-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-62-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-60-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-59-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-58-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-57-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-53-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-52-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-51-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-49-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-48-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-46-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-45-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-42-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/400-41-0x00000000003B0000-0x00000000003C9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-39-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-38-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-37-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-36-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-35-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-34-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-33-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-32-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-61-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-56-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-55-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-54-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-50-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-47-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-44-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-27-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-26-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-25-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-23-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-22-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-21-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-20-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-17-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-14-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-13-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-12-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-19-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-18-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-16-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-15-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-11-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-10-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-9-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-8-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-4-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/3068-1769-0x00000000001C0000-0x00000000001D9000-memory.dmp netwalker_ransomware behavioral2/memory/400-1770-0x00000000003B0000-0x00000000003C9000-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 (160) 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 3068 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\e883daf0 = "C:\\Program Files (x86)\\e883daf0\\e883daf0.exe" explorer.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3168 set thread context of 3068 3168 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 82 -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files (x86)\e883daf0\e883daf0.exe explorer.exe File opened for modification C:\Program Files (x86)\e883daf0\e883daf0.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 2888 vssadmin.exe 4428 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 3068 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe 400 explorer.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 3168 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 3068 explorer.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 400 explorer.exe Token: SeBackupPrivilege 7084 vssvc.exe Token: SeRestorePrivilege 7084 vssvc.exe Token: SeAuditPrivilege 7084 vssvc.exe -
Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 3168 wrote to memory of 3068 3168 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 82 PID 3168 wrote to memory of 3068 3168 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 82 PID 3168 wrote to memory of 3068 3168 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 82 PID 3068 wrote to memory of 400 3068 explorer.exe 83 PID 3068 wrote to memory of 400 3068 explorer.exe 83 PID 3068 wrote to memory of 400 3068 explorer.exe 83 PID 400 wrote to memory of 2888 400 explorer.exe 84 PID 400 wrote to memory of 2888 400 explorer.exe 84 PID 3068 wrote to memory of 6052 3068 explorer.exe 95 PID 3068 wrote to memory of 6052 3068 explorer.exe 95 PID 3068 wrote to memory of 6052 3068 explorer.exe 95 PID 3068 wrote to memory of 4428 3068 explorer.exe 96 PID 3068 wrote to memory of 4428 3068 explorer.exe 96 -
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:3168 -
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:3068 -
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:400 -
C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2888
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C:\Windows\SysWOW64\notepad.exeC:\Windows\system32\notepad.exe C:\Users\Admin\Desktop\E883-Readme.txt3⤵
- System Location Discovery: System Language Discovery
PID:6052
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C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:4428
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:7084
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD5d38c2725d0e290f29a6dc194080d7a0d
SHA1340a49f4e2e53c2c90542f565a4864adce242ce7
SHA256c8585fc87223fddd2a1a95d359d90b8e93dc53bb2dfae7072fb3938a2489d347
SHA512f05994fa548baab8c1516fc727b6ad6a0d6d9a1e76d200f8c2e4a9cf63bf2d71bd4906215b93f1a1156ab78352a3b9bdeb1160e4d17eec32d73b18664b364284