Analysis
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max time kernel
120s -
max time network
111s -
platform
windows10-1703_x64 -
resource
win10-20231129-en -
resource tags
arch:x64arch:x86image:win10-20231129-enlocale:en-usos:windows10-1703-x64system -
submitted
13/12/2023, 23:38
Behavioral task
behavioral1
Sample
b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe
Resource
win10-20231129-en
General
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Target
b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe
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Size
1.6MB
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MD5
720b055fb9de507cf81c7f98a1e54ebd
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SHA1
aa689e3bfd6f6c5cc3f98c6da53e8ec181d39e10
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SHA256
b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899
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SHA512
29febba7a189b5a0ba986178b378621828a68721b57fa34dc1ef32b9c1ca5f8dbc09c25f86090e03794a9aea24fc76f31a4460def21bed3a09bab1ca5015b5b7
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SSDEEP
49152:80ceOGgUYYEmluRKYoFh4kGWusbQnIyDi1E1uonTKi/OjCCNG:1XOGgUYC4RKXFhrusbaDkE1u
Malware Config
Signatures
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Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FANBooster131.lnk b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
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-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Windows\CurrentVersion\Run\MaxLoonaFest131 = "C:\\Users\\Admin\\AppData\\Local\\MaxLoonaFest131\\MaxLoonaFest131.exe" b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 4 ipinfo.io 5 ipinfo.io -
Drops file in System32 directory 4 IoCs
description ioc Process File opened for modification C:\Windows\System32\GroupPolicy b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe File opened for modification C:\Windows\SysWOW64\GroupPolicy\gpt.ini b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe File created C:\Windows\System32\GroupPolicy\Machine\Registry.pol b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe File opened for modification C:\Windows\System32\GroupPolicy\GPT.INI b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 5072 4596 WerFault.exe 73 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2712 schtasks.exe 4912 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 4596 wrote to memory of 2712 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 74 PID 4596 wrote to memory of 2712 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 74 PID 4596 wrote to memory of 2712 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 74 PID 4596 wrote to memory of 4912 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 79 PID 4596 wrote to memory of 4912 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 79 PID 4596 wrote to memory of 4912 4596 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe 79 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe"C:\Users\Admin\AppData\Local\Temp\b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899.exe"1⤵
- Drops startup file
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Drops file in System32 directory
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:4596 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe" /tn "OfficeTrackerNMP131 HR" /sc HOURLY /rl HIGHEST2⤵
- Creates scheduled task(s)
PID:2712
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /RU "Admin" /tr "C:\ProgramData\OfficeTrackerNMP131\OfficeTrackerNMP131.exe" /tn "OfficeTrackerNMP131 LG" /sc ONLOGON /rl HIGHEST2⤵
- Creates scheduled task(s)
PID:4912
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4596 -s 16402⤵
- Program crash
PID:5072
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum1⤵PID:3028
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\??\c:\windows\system32\svchost.exec:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc1⤵PID:4732
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.6MB
MD5720b055fb9de507cf81c7f98a1e54ebd
SHA1aa689e3bfd6f6c5cc3f98c6da53e8ec181d39e10
SHA256b5d3f136f09a235c58e4571cd85f8a455ae710620f2c8816590e31c9de723899
SHA51229febba7a189b5a0ba986178b378621828a68721b57fa34dc1ef32b9c1ca5f8dbc09c25f86090e03794a9aea24fc76f31a4460def21bed3a09bab1ca5015b5b7
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Filesize
3KB
MD5b0354819209b19e042ff88d081abdea7
SHA111ce46bff10a64e393ccdaf2b69c3984d3886972
SHA25694d36f99f0436b36f1932edd4270ef8274123a272fd9b5b37e61e36cdc7e8572
SHA512bd26d02326480a2f2a9e8749367f5c49225c427147e62e8a4e1a17746c09edf4129b596023a72f32b5050a7596dd86560bb1b28141572cf43aaf5936b5698014
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Filesize
92KB
MD58e8e7137325b5aa4e1206f338a7ccde7
SHA123a2d46d2812f664d8fff942d493e85afe5f6a27
SHA256bbbd94e3e65b0cf446d3f651f1a557e479c2adc8c0c955a18addd89fcd7ffe25
SHA5121512bc6ad27b5b794d44b2599ace04a325b32726a1c96e2f8a6f75d55c494e65a4cdd1ea241027d693cd54dc049ad4a23b2147bb1a49450b7949cc71dba06233