Analysis
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max time kernel
145s -
max time network
147s -
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, 22:15
Behavioral task
behavioral1
Sample
38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe
Resource
win10-20231129-en
General
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Target
38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe
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Size
1.6MB
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MD5
e76510d9e8d607a7b5d3788bf40efcc2
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SHA1
e99fd54d9b68b69a7dabbd1bcbab286fbd32199e
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SHA256
38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8
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SHA512
33f1e3206996c621bf491348ac5251382254c4abe173667a547f4dc0757f1498f0ea637251a61b3998e73c62244c8f5e056a65fb9ef7039120aeafed37c42c98
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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 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe Key opened \REGISTRY\USER\S-1-5-21-3426238547-133202173-2522127025-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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" 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 3 ipinfo.io 4 ipinfo.io -
Drops file in System32 directory 4 IoCs
description ioc Process File opened for modification C:\Windows\System32\GroupPolicy 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe File opened for modification C:\Windows\SysWOW64\GroupPolicy\gpt.ini 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe File created C:\Windows\System32\GroupPolicy\Machine\Registry.pol 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe File opened for modification C:\Windows\System32\GroupPolicy\GPT.INI 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 4836 4048 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 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 2476 schtasks.exe 4700 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 4048 wrote to memory of 2476 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 74 PID 4048 wrote to memory of 2476 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 74 PID 4048 wrote to memory of 2476 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 74 PID 4048 wrote to memory of 4700 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 79 PID 4048 wrote to memory of 4700 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe 79 PID 4048 wrote to memory of 4700 4048 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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 38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.exe"C:\Users\Admin\AppData\Local\Temp\38ff52c88b59d6b8ab2777bb67a44bb35a72cd9b68aaac77b613a462ddf19eb8.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:4048 -
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:2476
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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:4700
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4048 -s 16202⤵
- Program crash
PID:4836
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum1⤵PID:2472
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\??\c:\windows\system32\svchost.exec:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc1⤵PID:4604
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.1MB
MD517a1ef6fb792b61e5fc080c748eec520
SHA16b8686eb204358a8d3419cfd63a1eafe88c619f1
SHA256ab367ba5b058797ef3b90bebe273aa298f9c0f9934848b40eb566fc003b2f95a
SHA512b2a282e313b80f8db8b748c457f51c115513c156c11f34e8c38cc413621ff89f6e15030ec4dd531ec1059d104cb8403ee245ef24cb6683152d83fa4fecab6d96
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Filesize
3KB
MD5e05aabe4efe7c2fd86896fb04e4f8610
SHA182d4d8ed4067033832df9f6b548363391eafbabe
SHA2569c2a35565e2abec181fb8255f8e1c56169574ff0a04514c4a052a2070a5e3087
SHA512b442b6cc1fa4786a3a607182b03d924b9a8358bfebde6faffe7166e328437dae1210721ad8df6ade275beb7edcb08e80b58f754715da3029900298bb0664bf96
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Filesize
92KB
MD58e8e7137325b5aa4e1206f338a7ccde7
SHA123a2d46d2812f664d8fff942d493e85afe5f6a27
SHA256bbbd94e3e65b0cf446d3f651f1a557e479c2adc8c0c955a18addd89fcd7ffe25
SHA5121512bc6ad27b5b794d44b2599ace04a325b32726a1c96e2f8a6f75d55c494e65a4cdd1ea241027d693cd54dc049ad4a23b2147bb1a49450b7949cc71dba06233