Analysis
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max time kernel
82s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
05-07-2022 13:04
Static task
static1
Behavioral task
behavioral1
Sample
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe
Resource
win10v2004-20220414-en
General
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Target
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe
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Size
304KB
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MD5
2f779b2196af55484be830b22eda9dca
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SHA1
a6e6a3d2b92abc988e82e254705c01d6357d1b4e
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SHA256
e7ee8ff4872d57b2fba736ee6556e3f92a3fc1c3c8738c50cc8b1e6acbb4379f
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SHA512
03c71e113a5ad18c877e2089cafc4541350372237bf022c5a4f0e9ac9e10122513c94c2097c09955d8cec9b1a75c04ee870c7b1f65dd2f7243a4ec4960fd0c36
Malware Config
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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suricata: ET MALWARE LokiBot Application/Credential Data Exfiltration Detected M1
suricata: ET MALWARE LokiBot Application/Credential Data Exfiltration Detected M1
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suricata: ET MALWARE LokiBot Application/Credential Data Exfiltration Detected M2
suricata: ET MALWARE LokiBot Application/Credential Data Exfiltration Detected M2
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suricata: ET MALWARE LokiBot Checkin
suricata: ET MALWARE LokiBot Checkin
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suricata: ET MALWARE LokiBot Request for C2 Commands Detected M1
suricata: ET MALWARE LokiBot Request for C2 Commands Detected M1
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suricata: ET MALWARE LokiBot Request for C2 Commands Detected M2
suricata: ET MALWARE LokiBot Request for C2 Commands Detected M2
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suricata: ET MALWARE LokiBot User-Agent (Charon/Inferno)
suricata: ET MALWARE LokiBot User-Agent (Charon/Inferno)
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Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exeSecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription ioc process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Loads dropped DLL 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exepid process 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
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
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.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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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exepid process 4320 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe 4320 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exeSecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exepid process 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe 4320 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription pid process target process PID 2172 set thread context of 4320 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Drops file in Windows directory 2 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription ioc process File opened for modification C:\Windows\Fonts\underbelysningers.Ame121 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe File opened for modification C:\Windows\resources\Medicament113\Referencevrkerne\trkkanalers\Nonmetamorphoses.Zed SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exepid process 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exepid process 4320 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription pid process Token: SeDebugPrivilege 4320 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription pid process target process PID 2172 wrote to memory of 4320 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe PID 2172 wrote to memory of 4320 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe PID 2172 wrote to memory of 4320 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe PID 2172 wrote to memory of 4320 2172 SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
outlook_office_path 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe -
outlook_win_path 1 IoCs
Processes:
SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.UDS.Trojan-Downloader.Win32.GuLoader.gen.7523.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\nssCFBC.tmp\System.dllFilesize
12KB
MD5cff85c549d536f651d4fb8387f1976f2
SHA1d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA2568dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
SHA512531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88
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memory/2172-142-0x0000000004940000-0x0000000004A40000-memory.dmpFilesize
1024KB
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memory/2172-137-0x0000000077470000-0x0000000077613000-memory.dmpFilesize
1.6MB
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memory/2172-133-0x00007FFA17D50000-0x00007FFA17F45000-memory.dmpFilesize
2.0MB
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memory/2172-134-0x0000000077470000-0x0000000077613000-memory.dmpFilesize
1.6MB
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memory/2172-143-0x0000000077470000-0x0000000077613000-memory.dmpFilesize
1.6MB
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memory/2172-131-0x0000000004940000-0x0000000004A40000-memory.dmpFilesize
1024KB
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memory/2172-132-0x0000000004940000-0x0000000004A40000-memory.dmpFilesize
1024KB
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memory/4320-139-0x0000000001660000-0x0000000001760000-memory.dmpFilesize
1024KB
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memory/4320-135-0x0000000000000000-mapping.dmp
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memory/4320-140-0x00007FFA17D50000-0x00007FFA17F45000-memory.dmpFilesize
2.0MB
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memory/4320-141-0x0000000077470000-0x0000000077613000-memory.dmpFilesize
1.6MB
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memory/4320-136-0x0000000000400000-0x0000000001654000-memory.dmpFilesize
18.3MB
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memory/4320-138-0x0000000001660000-0x0000000001760000-memory.dmpFilesize
1024KB
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memory/4320-144-0x00007FFA17D50000-0x00007FFA17F45000-memory.dmpFilesize
2.0MB
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memory/4320-145-0x0000000077470000-0x0000000077613000-memory.dmpFilesize
1.6MB
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memory/4320-146-0x0000000001660000-0x0000000001760000-memory.dmpFilesize
1024KB