Analysis
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max time kernel
120s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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\Public\Music\Sample Music\3468-Readme.txt
netwalker
Signatures
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Detected Netwalker Ransomware 64 IoCs
Detected unpacked Netwalker executable.
resource yara_rule behavioral1/memory/2620-0-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-3-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-2-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-4-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-28-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-27-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-26-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-25-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-24-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-23-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-22-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-21-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-20-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-19-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-18-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/1500-17-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-16-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-14-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-13-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-12-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-11-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-10-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-9-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-8-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-7-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-6-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-5-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-36-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-35-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-34-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-33-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-32-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-29-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-224-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-223-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-222-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-221-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-220-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-219-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-218-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-217-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-216-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-215-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-214-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-213-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-212-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-211-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-210-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-209-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-207-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-206-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-47-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-46-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-45-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-44-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-43-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-42-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-41-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-40-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-39-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-38-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-37-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/1500-1779-0x0000000000080000-0x0000000000099000-memory.dmp netwalker_ransomware behavioral1/memory/2620-1784-0x0000000000080000-0x0000000000099000-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 (188) 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 2620 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\3468b717 = "C:\\Program Files (x86)\\3468b717\\3468b717.exe" explorer.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2488 set thread context of 2620 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 31 PID 2620 set thread context of 1500 2620 explorer.exe 32 -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files (x86)\3468b717\3468b717.exe explorer.exe File opened for modification C:\Program Files (x86)\3468b717\3468b717.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 2848 vssadmin.exe 1512 vssadmin.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 2620 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe 1500 explorer.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 2620 explorer.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 1500 explorer.exe Token: SeBackupPrivilege 496 vssvc.exe Token: SeRestorePrivilege 496 vssvc.exe Token: SeAuditPrivilege 496 vssvc.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 2488 wrote to memory of 2620 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 31 PID 2488 wrote to memory of 2620 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 31 PID 2488 wrote to memory of 2620 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 31 PID 2488 wrote to memory of 2620 2488 2025-01-22_12448b9b16e1c3a907f669ff5906046d_babuk_mailto.exe 31 PID 2620 wrote to memory of 1500 2620 explorer.exe 32 PID 2620 wrote to memory of 1500 2620 explorer.exe 32 PID 2620 wrote to memory of 1500 2620 explorer.exe 32 PID 2620 wrote to memory of 1500 2620 explorer.exe 32 PID 1500 wrote to memory of 2848 1500 explorer.exe 33 PID 1500 wrote to memory of 2848 1500 explorer.exe 33 PID 1500 wrote to memory of 2848 1500 explorer.exe 33 PID 1500 wrote to memory of 2848 1500 explorer.exe 33 PID 2620 wrote to memory of 1960 2620 explorer.exe 38 PID 2620 wrote to memory of 1960 2620 explorer.exe 38 PID 2620 wrote to memory of 1960 2620 explorer.exe 38 PID 2620 wrote to memory of 1960 2620 explorer.exe 38 PID 2620 wrote to memory of 1512 2620 explorer.exe 39 PID 2620 wrote to memory of 1512 2620 explorer.exe 39 PID 2620 wrote to memory of 1512 2620 explorer.exe 39 PID 2620 wrote to memory of 1512 2620 explorer.exe 39 -
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:2488 -
C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"2⤵
- Deletes itself
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2620 -
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:1500 -
C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2848
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C:\Windows\SysWOW64\notepad.exeC:\Windows\system32\notepad.exe C:\Users\Admin\Desktop\3468-Readme.txt3⤵
- System Location Discovery: System Language Discovery
PID:1960
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C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:1512
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:496
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD5e67cca44fd2106a33750b17076f174b5
SHA1284d89efad3f1ca4291826fb811f87c29a0f4a6b
SHA2567f51571442f8f0521f5cf563a32c21b89fe1935f4a357038f56770e7bd2880c0
SHA512bb52ebe348978059b496523c5f59a6a0aeed58d8f23ffffad8eebfc8e24f4c7fa89e02df73019242bdf4b4142514c08edfcf18ab156742a1c2388cd8427b2428