Analysis
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max time kernel
94s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
08-01-2025 23:50
Behavioral task
behavioral1
Sample
JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe
Resource
win10v2004-20241007-en
General
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Target
JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe
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Size
350KB
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MD5
b37307f153f10f0299c68e21cda50830
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SHA1
1475e31efca6cbaccbc4c942a88c500e0b22ccb0
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SHA256
9557bc3e8544245727beca4004e71d616515ce39dc8b6cc27c3332614e9aa27a
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SHA512
995bdd5eccc5801cd58284d385e1fd74f3fb2db9e884617d129ec4e77df75a504b0e7edf586b86bc3f979da7f8243d7c06752b993521245e373e7c9b6f87baca
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SSDEEP
6144:sZl2fltfzOHfEu6YdtLnIbtLV0433k85AKYzAeCnvW1BzdCC0Af3a1:sm/2JndtOtZLkqUzAeCvW1+dM3a1
Malware Config
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Agenttesla family
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AgentTesla payload 15 IoCs
resource yara_rule behavioral2/memory/412-60-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-66-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-75-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-83-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-81-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-80-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-78-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-74-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-72-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-70-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-69-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-68-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-67-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-65-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla behavioral2/memory/412-64-0x0000000000400000-0x000000000044E000-memory.dmp family_agenttesla -
Executes dropped EXE 2 IoCs
pid Process 764 kR8aM0MJZ5fj8ja.exe 4676 CTS.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
Adds Run key to start application 2 TTPs 3 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MyApp = "C:\\Users\\Admin\\AppData\\Roaming\\MyApp\\MyApp.exe" RegAsm.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 38 checkip.amazonaws.com -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 764 set thread context of 412 764 kR8aM0MJZ5fj8ja.exe 86 -
resource yara_rule behavioral2/memory/3160-0-0x00000000006C0000-0x00000000006D9000-memory.dmp upx behavioral2/files/0x000c000000023b4e-4.dat upx behavioral2/memory/764-5-0x0000000000A50000-0x0000000000AB1000-memory.dmp upx behavioral2/files/0x000c000000023b9a-7.dat upx behavioral2/memory/4676-9-0x00000000001B0000-0x00000000001C9000-memory.dmp upx behavioral2/memory/3160-8-0x00000000006C0000-0x00000000006D9000-memory.dmp upx behavioral2/files/0x000e000000023a12-13.dat upx behavioral2/memory/764-38-0x0000000000A50000-0x0000000000AB1000-memory.dmp upx behavioral2/memory/4676-51-0x00000000001B0000-0x00000000001C9000-memory.dmp upx behavioral2/memory/764-62-0x0000000000A50000-0x0000000000AB1000-memory.dmp upx -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe File created C:\Windows\CTS.exe CTS.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 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language CTS.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language kR8aM0MJZ5fj8ja.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language RegAsm.exe -
Suspicious behavior: EnumeratesProcesses 10 IoCs
pid Process 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 764 kR8aM0MJZ5fj8ja.exe 412 RegAsm.exe 412 RegAsm.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 764 kR8aM0MJZ5fj8ja.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe Token: SeDebugPrivilege 4676 CTS.exe Token: SeDebugPrivilege 412 RegAsm.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 412 RegAsm.exe -
Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 3160 wrote to memory of 764 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 83 PID 3160 wrote to memory of 764 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 83 PID 3160 wrote to memory of 764 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 83 PID 3160 wrote to memory of 4676 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 84 PID 3160 wrote to memory of 4676 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 84 PID 3160 wrote to memory of 4676 3160 JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe 84 PID 764 wrote to memory of 412 764 kR8aM0MJZ5fj8ja.exe 86 PID 764 wrote to memory of 412 764 kR8aM0MJZ5fj8ja.exe 86 PID 764 wrote to memory of 412 764 kR8aM0MJZ5fj8ja.exe 86 PID 764 wrote to memory of 412 764 kR8aM0MJZ5fj8ja.exe 86 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_b37307f153f10f0299c68e21cda50830.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3160 -
C:\Users\Admin\AppData\Local\Temp\kR8aM0MJZ5fj8ja.exeC:\Users\Admin\AppData\Local\Temp\kR8aM0MJZ5fj8ja.exe2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:764 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exeC:\Users\Admin\AppData\Local\Temp\kR8aM0MJZ5fj8ja.exe3⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:412
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C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4676
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
404KB
MD5109df0f55366f8547704613ff992c4bd
SHA1bd8ff519c7aeb16f747269fb04c19326329434bb
SHA25676f99d8456dc0e2f60e429203d1d26dca41049cb26265a8e29c88fa92e0df588
SHA5127e96b69d5a34fca9a167ef8a6c49aafe1556ade5b0420e9ec76c6309402c54c2c7b1dc24a0da7a138be7691c95437851e003f5a4575a0b7b5cbc4c8bfbe22127
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Filesize
267KB
MD5c9f00fe1929c71a9de2e73434b288eee
SHA12e1932cbe3cacfbd27ec01c089ad0b4e8268d8a7
SHA256478f1269193cc62ff2180c53eecc56e287417539287520e03b362773b58c78be
SHA512f9ce552a3ccd219692ef38c71f9a2959ffa08e9dc14ca0ec69c354a24fe855515c0525ca8e6e2c9cad48e4967774178c5cee7dc88fb577dc4dec0bc4616c8600
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Filesize
82KB
MD5546ffd2b72777e6a9e350780b79f99d4
SHA1a620be74a2f432656e38e51cd02fbdc3e3b312c2
SHA256c651b378896fad56ddeb1fec2c578a822bbb13269ec881f9420bbf47c9fbfbb5
SHA51257d49f830f9774ef0a4b6d026211360ea4ebcc6b236b72107401284559c7c589733bccc8af10c5a0cee5b97880d24a4e9954beb81887b1b124f8a42cca456fac