Analysis
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max time kernel
96s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-20250129-en -
resource tags
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submitted
31/01/2025, 01:58
General
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Target
Contract-pdf.exe
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Size
751KB
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MD5
455b5452ab7cc1d908fa70d7745a96fd
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SHA1
6fdbeda74a6d56453149e907b707cdd5ff7a193b
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SHA256
72433c6e5c9594689111646fbf25edacc240f028664b0216559aa5952ca3ec23
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SHA512
5e1687bd999369569202ac1b8255289cc75b0c0b2d0d54ab9c05676a7d37554bab09dbd38b4c45cd5d60cd56de9bcfc2efb7cf6d649679e938d7ddf0c3f436ad
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SSDEEP
12288:pX9/Od/QKZlFhOeTp/muQrOnpCirVUkstBLyywCwOD/Wh:pXRY/bHt/FQOncFHp
Malware Config
Signatures
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Guloader family
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Loads dropped DLL 2 IoCs
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Drops file in System32 directory 1 IoCs
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Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
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Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
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Drops file in Program Files directory 2 IoCs
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Drops file in Windows directory 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Suspicious behavior: EnumeratesProcesses 14 IoCs
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Suspicious behavior: MapViewOfSection 1 IoCs
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Suspicious use of WriteProcessMemory 4 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Contract-pdf.exe"C:\Users\Admin\AppData\Local\Temp\Contract-pdf.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Contract-pdf.exe"C:\Users\Admin\AppData\Local\Temp\Contract-pdf.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
12KB
MD54add245d4ba34b04f213409bfe504c07
SHA1ef756d6581d70e87d58cc4982e3f4d18e0ea5b09
SHA2569111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706
SHA5121bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d
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Filesize
18.3MB
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Filesize
18.3MB
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Filesize
12KB
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Filesize
18.3MB
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Filesize
81.1MB
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Filesize
4KB
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Filesize
4KB
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Filesize
18.3MB
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Filesize
18.3MB
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Filesize
12KB
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Filesize
81.1MB
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Filesize
18.3MB
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Filesize
18.3MB
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Filesize
1.1MB
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Filesize
12KB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
4KB