Analysis
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max time kernel
117s -
max time network
118s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
01-10-2024 06:04
Static task
static1
Behavioral task
behavioral1
Sample
Fatura 001.xlsx
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Fatura 001.xlsx
Resource
win10v2004-20240802-en
General
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Target
Fatura 001.xlsx
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Size
1.9MB
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MD5
9273a696f6ef57cdda7670f5b8742a1a
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SHA1
68b3f8d1448d31d42f0efdb59313ee031bba0c7c
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SHA256
df4c4ff517e33b8a2cec86619652fa6cdb4ed7acd120a7e8866b673cb554b974
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SHA512
407ed0402d1940b5d7dfceb0bf45bf05814f54b091b1cfbc918bdf715b91a97e949bbad176bef553820a40885e9382633d5853ce2e31f130d74b3d6f470b2110
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SSDEEP
49152:c2Hqv0ubGHrUFG9Etdc+BEJiAOtSigHUZRsT:H3+GHrUA9Enc+CpUZRsT
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.solucionesmexico.mx - Port:
587 - Username:
[email protected] - Password:
Qdk,[nKrmI0j - Email To:
[email protected]
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Blocklisted process makes network request 2 IoCs
flow pid Process 5 2316 EQNEDT32.EXE 7 2316 EQNEDT32.EXE -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
pid Process 2868 winterz.exe -
Loads dropped DLL 1 IoCs
pid Process 2316 EQNEDT32.EXE -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
AutoIT Executable 1 IoCs
AutoIT scripts compiled to PE executables.
resource yara_rule behavioral1/files/0x0008000000015ff5-16.dat autoit_exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2868 set thread context of 2660 2868 winterz.exe 33 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 RegSvcs.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language EXCEL.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language EQNEDT32.EXE Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language winterz.exe -
Enumerates system info in registry 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE -
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
pid Process 2316 EQNEDT32.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3064 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2660 RegSvcs.exe 2660 RegSvcs.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 2868 winterz.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2660 RegSvcs.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
pid Process 3064 EXCEL.EXE 3064 EXCEL.EXE 3064 EXCEL.EXE -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 2316 wrote to memory of 2868 2316 EQNEDT32.EXE 32 PID 2316 wrote to memory of 2868 2316 EQNEDT32.EXE 32 PID 2316 wrote to memory of 2868 2316 EQNEDT32.EXE 32 PID 2316 wrote to memory of 2868 2316 EQNEDT32.EXE 32 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 PID 2868 wrote to memory of 2660 2868 winterz.exe 33 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Fatura 001.xlsx"1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:3064
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C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2316 -
C:\Users\Admin\AppData\Local\Temp\winterz.exeC:\Users\Admin\AppData\Local\Temp\winterz.exe2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2868 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exeC:\Users\Admin\AppData\Local\Temp\winterz.exe3⤵
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2660
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.1MB
MD50fcfeefef9e389286b0ef7e97e1e7f28
SHA185986dadc140d6d719b844e6f38d775dfad211d5
SHA256c186def00d97aabdf95cf1bbd2605ef8ffc8a05e13fff501b0117ae7395d4487
SHA512e64a173aef6f91d03ba26762ee176b32e50e9344d1cf473dbdd22949c067a0e4b9354f7ecfc742afa6fc53ed67809e1dd7b599f8fbe596dc797d616063e7ed19