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Analysis
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max time kernel
132s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
01/02/2024, 01:45
Static task
static1
Behavioral task
behavioral1
Sample
859ab25dd3293afd3340bcf184ffde56.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
859ab25dd3293afd3340bcf184ffde56.exe
Resource
win10v2004-20231222-en
General
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Target
859ab25dd3293afd3340bcf184ffde56.exe
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Size
1.3MB
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MD5
859ab25dd3293afd3340bcf184ffde56
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SHA1
bafb31af0c29dbfd048e99220c59e7d133c45aec
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SHA256
c9f4f657e5c919e79eb5eaae5b0ac38683497288f7671f843d5097bf8fe96bf4
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SHA512
882324787b8662f66de3d06ff5fbc53f216ef89dc81c4b0e9006fe0107050cc11b599fa4db1d45a4072741cb3032bc33e982166e32f7ce6a189afbac5340adaa
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SSDEEP
24576:NU6nWI0raIi1Vfch/9K/4PMavESaoWV/Nm/y12NhmSO:NUTIKaV1Vfm82MavzVyYY
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.carryfastagencies.com - Port:
587 - Username:
[email protected] - Password:
jim$7257
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla payload 2 IoCs
resource yara_rule behavioral2/memory/2456-17-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral2/memory/2456-21-0x0000000005080000-0x0000000005090000-memory.dmp family_agenttesla -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\system32\drivers\etc\hosts 859ab25dd3293afd3340bcf184ffde56.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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 859ab25dd3293afd3340bcf184ffde56.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 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 859ab25dd3293afd3340bcf184ffde56.exe Key opened \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 859ab25dd3293afd3340bcf184ffde56.exe Key opened \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 859ab25dd3293afd3340bcf184ffde56.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kprUEGC = "C:\\Users\\Admin\\AppData\\Roaming\\kprUEGC\\kprUEGC.exe" 859ab25dd3293afd3340bcf184ffde56.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 5036 set thread context of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1980 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 5036 859ab25dd3293afd3340bcf184ffde56.exe 5036 859ab25dd3293afd3340bcf184ffde56.exe 2456 859ab25dd3293afd3340bcf184ffde56.exe 2456 859ab25dd3293afd3340bcf184ffde56.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 5036 859ab25dd3293afd3340bcf184ffde56.exe Token: SeDebugPrivilege 2456 859ab25dd3293afd3340bcf184ffde56.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2456 859ab25dd3293afd3340bcf184ffde56.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 5036 wrote to memory of 1980 5036 859ab25dd3293afd3340bcf184ffde56.exe 97 PID 5036 wrote to memory of 1980 5036 859ab25dd3293afd3340bcf184ffde56.exe 97 PID 5036 wrote to memory of 1980 5036 859ab25dd3293afd3340bcf184ffde56.exe 97 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 PID 5036 wrote to memory of 2456 5036 859ab25dd3293afd3340bcf184ffde56.exe 99 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 859ab25dd3293afd3340bcf184ffde56.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 859ab25dd3293afd3340bcf184ffde56.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\859ab25dd3293afd3340bcf184ffde56.exe"C:\Users\Admin\AppData\Local\Temp\859ab25dd3293afd3340bcf184ffde56.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5036 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JkzrgbeDyboeo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFA3E.tmp"2⤵
- Creates scheduled task(s)
PID:1980
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C:\Users\Admin\AppData\Local\Temp\859ab25dd3293afd3340bcf184ffde56.exe"C:\Users\Admin\AppData\Local\Temp\859ab25dd3293afd3340bcf184ffde56.exe"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:2456
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