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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
17/01/2024, 07:16
Behavioral task
behavioral1
Sample
620dbff61df2d779fc715becb07ce666.exe
Resource
win7-20231215-en
General
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Target
620dbff61df2d779fc715becb07ce666.exe
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Size
212KB
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MD5
620dbff61df2d779fc715becb07ce666
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SHA1
b992233848abee3899700d70307c05871726aa82
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SHA256
b6cdd4dd284aadc427da38c28402e27c39f323fedf774eda4df3913dfe92ab88
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SHA512
f15e164cb6c18e2b13a1e69c84315447d4c29efc67a030f3b42939e7fef6c2ccf85a33fa97bfe3e3efb3f09452bb4fbbf62d30ff819f8f1aaf894b280f9a4e5c
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SSDEEP
3072:RJacj8v7wQ+ZGx7w8wjjP8I1IU8RjrzzvUWAOZjfKdLnYP:RJPgv7wJZ87wBjYI1IUwrIOZyYP
Malware Config
Extracted
njrat
0.6.4
Hacked
abdo95.ddns.net:1177
ed6e2bf930f6d35b3ac57c049d10ac2c
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reg_key
ed6e2bf930f6d35b3ac57c049d10ac2c
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splitter
|'|'|
Signatures
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Modifies Windows Firewall 1 TTPs 1 IoCs
pid Process 2768 netsh.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation test.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ed6e2bf930f6d35b3ac57c049d10ac2c.exe Explorer.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ed6e2bf930f6d35b3ac57c049d10ac2c.exe Explorer.exe -
Executes dropped EXE 2 IoCs
pid Process 4940 test.exe 1616 Explorer.exe -
resource yara_rule behavioral2/memory/4584-0-0x0000000000400000-0x0000000000498000-memory.dmp upx behavioral2/memory/4584-22-0x0000000000400000-0x0000000000498000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ed6e2bf930f6d35b3ac57c049d10ac2c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Explorer.exe\" .." Explorer.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ed6e2bf930f6d35b3ac57c049d10ac2c = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Explorer.exe\" .." Explorer.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 48 IoCs
pid Process 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe 1616 Explorer.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1616 Explorer.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4584 wrote to memory of 2936 4584 620dbff61df2d779fc715becb07ce666.exe 85 PID 4584 wrote to memory of 2936 4584 620dbff61df2d779fc715becb07ce666.exe 85 PID 4584 wrote to memory of 2936 4584 620dbff61df2d779fc715becb07ce666.exe 85 PID 2936 wrote to memory of 4940 2936 cmd.exe 86 PID 2936 wrote to memory of 4940 2936 cmd.exe 86 PID 2936 wrote to memory of 4940 2936 cmd.exe 86 PID 4940 wrote to memory of 1616 4940 test.exe 90 PID 4940 wrote to memory of 1616 4940 test.exe 90 PID 4940 wrote to memory of 1616 4940 test.exe 90 PID 1616 wrote to memory of 2768 1616 Explorer.exe 91 PID 1616 wrote to memory of 2768 1616 Explorer.exe 91 PID 1616 wrote to memory of 2768 1616 Explorer.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\620dbff61df2d779fc715becb07ce666.exe"C:\Users\Admin\AppData\Local\Temp\620dbff61df2d779fc715becb07ce666.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4584 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c test.exe2⤵
- Suspicious use of WriteProcessMemory
PID:2936 -
C:\Users\Admin\AppData\Local\Temp\test.exetest.exe3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4940 -
C:\Users\Admin\AppData\Local\Temp\Explorer.exe"C:\Users\Admin\AppData\Local\Temp\Explorer.exe"4⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1616 -
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Explorer.exe" "Explorer.exe" ENABLE5⤵
- Modifies Windows Firewall
PID:2768
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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
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
29KB
MD5fc42513e45503d510fb011bbb309e51e
SHA1e9741466f6e68dadb9e874f12d5b62fe14693741
SHA256766240fd9026a04e4a7f20240f699133eef24a969e242afdd471ad0a179cefe3
SHA5120f2a88f96a8a47abe062ccca986d2b3d98310374629c9067b19dbfeb73f23ba411b3ca5ae3877684770fb2d25947305b42c38a913a329e6220de6cd5d539a8ca