Analysis
- max time kernel
149s - max time network
120s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
06/10/2026, 09:36
Static task
static1
Behavioral task
behavioral1
Sample
jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe
Resource
win10v2004-20260911-en
General
- Target jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe
- Size 403KB
- Sample261006-lk3kcsvgka
- SHA256 54ba3bf68c49926c8890aec36971bbb44945079024ab0fdd07f46b052eb25703
- MD5 1147b3df094e154c587c61e5e0b6a028
- SHA1 8bc4e9ded33ded47fb8e5db1167f0e2f778b866a
- SHA512 fcb083ed2c94941e2d6411510e711c59d4a2d72d83ca640611c9e21c31008a9d2cbf53b9719fdadb021bd147d264eec89f963e2d8fce79e863986d0b9574ab5c
- SSDEEP 12288:gqmpplpGoGL3etQoMiXM8gxf/Sj4yYA4FTP6w:y563ey8gZqj4yYAiiw
- TLSH T12A94235F1F2B0592C29ACCFACB126BA06F1095F29469AFBD7030DA9CD520EF1DF64419
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Detects ProRat payload 17 IoCs
resource yara_rule behavioral2/memory/1996-40-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/4584-42-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-44-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-45-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-47-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-49-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-51-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-53-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-55-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-58-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-60-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-62-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-64-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-66-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-68-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-70-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat behavioral2/memory/1296-72-0x0000000000400000-0x00000000005FC000-memory.dmp family_prorat - Modifies WinLogon for persistence 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe" lncom.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe C:\\Windows\\system32\\fservice.exe" services.exe - Adds policy Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe" lncom.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run services.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DirectX For Microsoft® Windows = "C:\\Windows\\system32\\fservice.exe" services.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run lncom.exe - Boot or Logon Autostart Execution: Active Setup 2 TTPs 5 IoCs
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\ lncom.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe" lncom.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\ services.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y}\StubPath = "C:\\Windows\\system\\sservice.exe" services.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{5Y99AE78-58TT-11dW-BE53-Y67078979Y} lncom.exe - A potential corporate email address has been identified in the URL 1 IoCs
description flow ioc pid Process Email address 11 [email protected] 1296 services.exe -
resource yara_rule behavioral2/files/0x001000000001c42a-23.dat aspack_v212_v242 - Executes dropped EXE 3 IoCs
pid Process 4584 lncom.exe 1996 fservice.exe 1296 services.exe - Loads dropped DLL 5 IoCs
pid Process 1296 services.exe 1296 services.exe 1296 services.exe 1996 fservice.exe 4584 lncom.exe - Modifies WinLogon 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\ lncom.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\ services.exe - Drops file in System32 directory 10 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\fservice.exe lncom.exe File created C:\Windows\SysWOW64\fservice.exe fservice.exe File opened for modification C:\Windows\SysWOW64\fservice.exe fservice.exe File created C:\Windows\SysWOW64\winkey.dll services.exe File created C:\Windows\SysWOW64\lncom.exe.bat lncom.exe File created C:\Windows\SysWOW64\lncom.exe jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe File created C:\Windows\SysWOW64\lncom_.jpg jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe File created C:\Windows\SysWOW64\fservice.exe lncom.exe File created C:\Windows\SysWOW64\reginv.dll services.exe File created C:\Windows\SysWOW64\fservice.exe services.exe -
resource yara_rule behavioral2/files/0x001d00000000696b-4.dat upx behavioral2/memory/4584-15-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1996-40-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/4584-42-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-44-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-45-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-47-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-49-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-51-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-53-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-55-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-58-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-60-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-62-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-64-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-66-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-68-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-70-0x0000000000400000-0x00000000005FC000-memory.dmp upx behavioral2/memory/1296-72-0x0000000000400000-0x00000000005FC000-memory.dmp upx - Drops file in Windows directory 7 IoCs
description ioc Process File created C:\Windows\system\sservice.exe lncom.exe File opened for modification C:\Windows\system\sservice.exe lncom.exe File created C:\Windows\services.exe fservice.exe File opened for modification C:\Windows\services.exe fservice.exe File created C:\Windows\system\sservice.exe fservice.exe File opened for modification C:\Windows\system\sservice.exe fservice.exe File created C:\Windows\system\sservice.exe services.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 2 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
pid Process 2036 cmd.exe 1540 cmd.exe - Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname services.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain services.exe - System Location Discovery: System Language Discovery 1 TTPs 10 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 services.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NET.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language net1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language fservice.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language NET.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language net1.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language lncom.exe - Runs net.exe
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe 1296 services.exe - Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1296 services.exe 1296 services.exe - Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 1844 wrote to memory of 4584 1844 jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe 90 PID 1844 wrote to memory of 2036 1844 jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe 91 PID 4584 wrote to memory of 1996 4584 lncom.exe 93 PID 1996 wrote to memory of 1296 1996 fservice.exe 94 PID 1296 wrote to memory of 3292 1296 services.exe 95 PID 1296 wrote to memory of 4004 1296 services.exe 96 PID 3292 wrote to memory of 2876 3292 NET.exe 99 PID 4004 wrote to memory of 6096 4004 NET.exe 100 PID 4584 wrote to memory of 1540 4584 lncom.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan-Dropper.Win32.Agent.bczn.exe"1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1844 -
C:\Windows\SysWOW64\lncom.exe"C:\Windows\system32\lncom.exe"2⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Boot or Logon Autostart Execution: Active Setup
- Executes dropped EXE
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4584 -
C:\Windows\SysWOW64\fservice.exeC:\Windows\system32\fservice.exe3⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1996 -
C:\Windows\services.exeC:\Windows\services.exe -XP4⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Boot or Logon Autostart Execution: Active Setup
- A potential corporate email address has been identified in the URL
- Executes dropped EXE
- Loads dropped DLL
- Modifies WinLogon
- Drops file in System32 directory
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1296 -
C:\Windows\SysWOW64\NET.exeNET STOP srservice5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3292 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 STOP srservice6⤵
- System Location Discovery: System Language Discovery
PID:2876
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C:\Windows\SysWOW64\NET.exeNET STOP navapsvc5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4004 -
C:\Windows\SysWOW64\net1.exeC:\Windows\system32\net1 STOP navapsvc6⤵
- System Location Discovery: System Language Discovery
PID:6096
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Windows\SysWOW64\lncom.exe.bat3⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
PID:1540
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE.bat2⤵
- Executes a command shell one-liner
- System Location Discovery: System Language Discovery
PID:2036
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵PID:3984
Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
4Active Setup
1Registry Run Keys / Startup Folder
1Winlogon Helper DLL
2Privilege Escalation
Boot or Logon Autostart Execution
4Active Setup
1Registry Run Keys / Startup Folder
1Winlogon Helper DLL
2Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\JAFFAC~1.EXE.bat
- Size 133B
- SHA256 cf0513e7b760b2838477996e6ae09781c98f32a2d4791471f6b82b1d77cd5ee4
- MD5 127346527a8f51194d7dbc218380f5eb
- SHA1 f9e10acb2252d09a4fd584b4a43f290964a0f9ae
- SHA512 51ed0ea6d24882dcd937dfee513bf92184ecea21920012c940c60a03db3b213ccb4218ac30f0360918f48b1fa739223357a3d4f8789cc394f0f4f829533b8651
- TLSH T15DC09B01C1DAD65F0984636706E5954CC0ACDD6D2E4F3F24DA65845C315245DF587B45
- MD5 SHA1 SHA512 TLSH
- Path C:\Windows\SysWOW64\lncom.exe
- Size 342KB
- SHA256 7e14e8676889e9246134fed41dd7e02a6a3bb279469b91dce7ec8038e535b02a
- MD5 ac89f205bb46d673c1bdf8ab5f262d96
- SHA1 991f4c6679c8679b762fe002695242589cb8d6b5
- SHA512 9d0fe91f76ba62fca93d8f7f8736327750465e8f7a7fa39cadf39b66a0cf2078c8c6f2ac32a452421f83141efa80d41c9979a525c358c2e18c77081bc79ae7f7
- SSDEEP 6144:DRqmpp+amNOGokzLyM9tsLAitQo6tzOKkzIt8gKyfjxfR9D2j4y4QM5uf:VqmpplpGoGL3etQoMiXM8gxf/Sj4yYAf
- TLSH T15674239F0B2F4493C29BDCFBC7027AA15F2459F2A06D5BF87030DE5E95248B99B90426
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\SysWOW64\lncom.exe.bat
- Size 99B
- SHA256 3a57d154715459926a51a9e3925687c0c78ec9c88bc39c303b5b93385d34d67e
- MD5 1f73e450d92934cd37c041eb3f1ff51f
- SHA1 f3e9dece5d6b7d7a0e4966c16ffe31437539d4a0
- SHA512 5f982d614e54870ae3ad212f049ca3685602812c1bb066a5f6155e694adb994d6d1608ca7a25bcab605812c6e7e6b22817aaf0dba9e906787add9b0a8e3f32a5
- TLSH T11FB002905434C0D5F450591C0B0D154FD75FE7E3640D393B15150185ECD10A55E566CC
- MD5 SHA1 SHA512 TLSH
- Path C:\Windows\SysWOW64\reginv.dll
- Size 36KB
- SHA256 c5b1d800c86d550c0b68c57c0d9911c1dd21df9e5e37e9e7bc032b5e66fdebe6
- MD5 562e0d01d6571fa2251a1e9f54c6cc69
- SHA1 83677ad3bc630aa6327253c7b3deffbd4a8ce905
- SHA512 166e132432eca24061f7e7d0c58c0b286e971ae2bc50f7c890b7707dd5dede19fcd83a5f79b6fd3f93dd691e07ad9bc1bd05fe82ccaade1610282188571585ea
- SSDEEP 384:nqqS78pWkPT5NGqu1mlWVtCj7y6bWHAtgNoUo3GFa:nqNmvT5JOCj7lWHAeiUo
- TLSH T1ADF26B217C8841F7D38E823171E6AF2B6AAF296118D54483D7319BF27C612E4BA1F347
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Windows\SysWOW64\winkey.dll
- Size 13KB
- SHA256 45d266269634ba2de70f179a26d7224111e677e66b38dff2802851b71ce4458f
- MD5 b4c72da9fd1a0dcb0698b7da97daa0cd
- SHA1 b25a79e8ea4c723c58caab83aed6ea48de7ed759
- SHA512 f5f184416c5381d275bc093c9275e9fdb35c58e2c401d188aef097950013de6e43269da5d4dd5e7baea34735bd7de664d15fe487b2292fd66926c9845b0cd066
- SSDEEP 384:NlYOgpRBTLCIlt5dtahAxvr6+S9Pfu7n5:NlZEXL3t5dtnx+deV
- TLSH T17B527DE6EE814CF3C0C825B251CB5A1F8B7A404149F386F39EE8C35F3849625E95EA41
- MD5 SHA1 SHA512 SSDEEP TLSH