Analysis
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max time kernel
150s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
07-01-2025 22:46
Behavioral task
behavioral1
Sample
3f390f2a4f32d4ec988f79a6a4a3b97b.exe
Resource
win7-20240903-en
windows7-x64
16 signatures
150 seconds
Behavioral task
behavioral2
Sample
3f390f2a4f32d4ec988f79a6a4a3b97b.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
14 signatures
150 seconds
General
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Target
3f390f2a4f32d4ec988f79a6a4a3b97b.exe
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Size
37KB
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MD5
3f390f2a4f32d4ec988f79a6a4a3b97b
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SHA1
e84304e45ae03bb421ea0f07e0e94fce052357ae
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SHA256
12b8b546038907862b15e79f5cb0fcc2c49fb9240323dd27b48d87309952c134
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SHA512
cba6ec596e23d4c957e2ab0591fc7d80add224a8717b7ea09a3bb7086d75d5622f2948c57d177d885c545d4a7140529e1c02f1b58d545d34a2e8bb6d3dd1b9bf
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SSDEEP
768:dgMcNwKslUV0bworAa8MzrM+rMRa8NuNrt:G/ylU6PAajM+gRJNa
Malware Config
Extracted
Family
njrat
Version
im523
Botnet
svchost
C2
finzydev.click:1609
Mutex
2bce908736ddb1f07610025aba2cbb94
Attributes
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reg_key
2bce908736ddb1f07610025aba2cbb94
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splitter
|'|'|
Signatures
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Njrat family
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Modifies Windows Firewall 2 TTPs 1 IoCs
pid Process 2600 netsh.exe -
Drops startup file 2 IoCs
description ioc Process File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2bce908736ddb1f07610025aba2cbb94.exe svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\2bce908736ddb1f07610025aba2cbb94.exe svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2688 svchost.exe -
Loads dropped DLL 1 IoCs
pid Process 2260 3f390f2a4f32d4ec988f79a6a4a3b97b.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\2bce908736ddb1f07610025aba2cbb94 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\" .." svchost.exe Set value (str) \REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\2bce908736ddb1f07610025aba2cbb94 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe\" .." svchost.exe -
Drops autorun.inf file 1 TTPs 5 IoCs
Malware can abuse Windows Autorun to spread further via attached volumes.
description ioc Process File created C:\autorun.inf svchost.exe File opened for modification C:\autorun.inf svchost.exe File created D:\autorun.inf svchost.exe File created F:\autorun.inf svchost.exe File opened for modification F:\autorun.inf svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs
Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.
description ioc Process Key opened \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh netsh.exe Key queried \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh netsh.exe Key value enumerated \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh netsh.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 taskkill.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 3f390f2a4f32d4ec988f79a6a4a3b97b.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language svchost.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe -
Kills process with taskkill 1 IoCs
pid Process 2732 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2688 svchost.exe -
Suspicious use of AdjustPrivilegeToken 36 IoCs
description pid Process Token: SeDebugPrivilege 2688 svchost.exe Token: SeDebugPrivilege 2732 taskkill.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe Token: 33 2688 svchost.exe Token: SeIncBasePriorityPrivilege 2688 svchost.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 2260 wrote to memory of 2688 2260 3f390f2a4f32d4ec988f79a6a4a3b97b.exe 31 PID 2260 wrote to memory of 2688 2260 3f390f2a4f32d4ec988f79a6a4a3b97b.exe 31 PID 2260 wrote to memory of 2688 2260 3f390f2a4f32d4ec988f79a6a4a3b97b.exe 31 PID 2260 wrote to memory of 2688 2260 3f390f2a4f32d4ec988f79a6a4a3b97b.exe 31 PID 2688 wrote to memory of 2600 2688 svchost.exe 32 PID 2688 wrote to memory of 2600 2688 svchost.exe 32 PID 2688 wrote to memory of 2600 2688 svchost.exe 32 PID 2688 wrote to memory of 2600 2688 svchost.exe 32 PID 2688 wrote to memory of 2732 2688 svchost.exe 34 PID 2688 wrote to memory of 2732 2688 svchost.exe 34 PID 2688 wrote to memory of 2732 2688 svchost.exe 34 PID 2688 wrote to memory of 2732 2688 svchost.exe 34
Processes
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C:\Users\Admin\AppData\Local\Temp\3f390f2a4f32d4ec988f79a6a4a3b97b.exe"C:\Users\Admin\AppData\Local\Temp\3f390f2a4f32d4ec988f79a6a4a3b97b.exe"1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2260 -
C:\Users\Admin\AppData\Local\Temp\svchost.exe"C:\Users\Admin\AppData\Local\Temp\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Drops autorun.inf file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2688 -
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\svchost.exe" "svchost.exe" ENABLE3⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:2600
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C:\Windows\SysWOW64\taskkill.exetaskkill /F /IM Exsample.exe3⤵
- System Location Discovery: System Language Discovery
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2732
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
1Replay Monitor
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Downloads
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Filesize
37KB
MD53f390f2a4f32d4ec988f79a6a4a3b97b
SHA1e84304e45ae03bb421ea0f07e0e94fce052357ae
SHA25612b8b546038907862b15e79f5cb0fcc2c49fb9240323dd27b48d87309952c134
SHA512cba6ec596e23d4c957e2ab0591fc7d80add224a8717b7ea09a3bb7086d75d5622f2948c57d177d885c545d4a7140529e1c02f1b58d545d34a2e8bb6d3dd1b9bf