Analysis
- max time kernel
143s - max time network
140s - platform
windows7_x64 - resource
win7-20230220-en - resource tags
- submitted
05/04/2023, 10:23
General
- Target 936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467.exe
- Size 617KB
- Sample230405-meszeadb22
- SHA256 936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467.exe"C:\Users\Admin\AppData\Local\Temp\936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467.exe"C:\Users\Admin\AppData\Local\Temp\936aa1ea53a82d1bf91ce740167b88e7fd5c84499840de3c1a9ee00c56df3467.exe"2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/1364-81-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1364-71-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1364-73-0x0000000001470000-0x000000000439B000-memory.dmp
memory/1364-74-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1364-93-0x0000000001470000-0x000000000439B000-memory.dmp
memory/1364-99-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1364-100-0x0000000001470000-0x000000000439B000-memory.dmp
memory/1364-101-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1364-105-0x0000000001470000-0x000000000439B000-memory.dmp
memory/1364-106-0x0000000034720000-0x0000000034A23000-memory.dmp
memory/1364-107-0x0000000000400000-0x0000000001462000-memory.dmp
memory/1660-72-0x0000000005CA0000-0x0000000008BCB000-memory.dmp
memory/1660-70-0x0000000005CA0000-0x0000000008BCB000-memory.dmp