Analysis
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max time kernel
120s -
max time network
110s -
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, 23:35
Behavioral task
behavioral1
Sample
d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe
Resource
win10-20231129-en
General
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Target
d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe
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Size
1.6MB
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MD5
b7f343ab07d73b9d3206829f49bc5942
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SHA1
0ccd7ef84c0f87fd80d76b8a969da3ed152b9bd6
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SHA256
d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a
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SHA512
810185825af3fadf3e9a00db88242436d54753371fcbf13936e2b1896748911eedd0b63a23a3ebaf56283625d9080708fefa81fec7a6ffec641546bf20ee95e9
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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 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.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-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe Key opened \REGISTRY\USER\S-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe Key opened \REGISTRY\USER\S-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Windows\CurrentVersion\Run\MaxLoonaFest131 = "C:\\Users\\Admin\\AppData\\Local\\MaxLoonaFest131\\MaxLoonaFest131.exe" d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.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 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 3 ipinfo.io -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\System32\GroupPolicy\Machine\Registry.pol d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe File opened for modification C:\Windows\System32\GroupPolicy\GPT.INI d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe File opened for modification C:\Windows\System32\GroupPolicy d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe File opened for modification C:\Windows\SysWOW64\GroupPolicy\gpt.ini d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.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 2408 400 WerFault.exe 72 -
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 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.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 4532 schtasks.exe 3140 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 400 wrote to memory of 4532 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 73 PID 400 wrote to memory of 4532 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 73 PID 400 wrote to memory of 4532 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 73 PID 400 wrote to memory of 3140 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 77 PID 400 wrote to memory of 3140 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 77 PID 400 wrote to memory of 3140 400 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe 77 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3171942101-2809460380-3727589934-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.exe"C:\Users\Admin\AppData\Local\Temp\d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a.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:400 -
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:4532
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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:3140
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 400 -s 16642⤵
- Program crash
PID:2408
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum1⤵PID:4180
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\??\c:\windows\system32\svchost.exec:\windows\system32\svchost.exe -k localsystemnetworkrestricted -s fhsvc1⤵PID:3780
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.6MB
MD5b7f343ab07d73b9d3206829f49bc5942
SHA10ccd7ef84c0f87fd80d76b8a969da3ed152b9bd6
SHA256d661b08dfac49bac58f07815ff8d3d680007f05cb3db878439c16ac9913abd9a
SHA512810185825af3fadf3e9a00db88242436d54753371fcbf13936e2b1896748911eedd0b63a23a3ebaf56283625d9080708fefa81fec7a6ffec641546bf20ee95e9
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Filesize
3KB
MD5c8469a6c19edb39b8746a1c6eccc3a3e
SHA1b7d52d3afef4affd2f2f7f6e11bc58ce476b95cb
SHA2561ca76ac99fb89401f7a4297da67bb2b311c7b03b6ca4eb4463136e6372077dfc
SHA51228f7070ee6e0408f46b53f9649c060c6e45359f4bfba6ab2cd356311e68438fe9d839eeca269c139915efa0b26cdf45ab9f222f1bec38edd5d9c363af8e23d60
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Filesize
92KB
MD5d540e45d4e0edb6aab5ed14cc52f1fa5
SHA10c9279b204416dfa86ee22993bd3325b5bc762b1
SHA256ddd7cbb13ec9dca8859d1a0f54d3f326c0097a8d2809636d96d2e4d9cfa86153
SHA5123dc3b50b4948f522f4746a0ef63cdc40995dad3a3ac901b277a37296a33eee2977121f7aa529d9ef7f0cb878c6e15fac6c5570f1e5f73e73b5379633bd0caf9f