Analysis
- max time kernel
146s - max time network
141s - platform
windows7_x64 - resource
win7-20230703-en - resource tags
- submitted
10/07/2023, 12:23
General
- Target Transferencia.exe
- Size 368KB
- Sample230710-pkg57sbb2w
- SHA256 c36591c7c0ef136b66dcf2955035ffc43ccd7fa6d6ce8c65f747dbe0aff7814e
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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Drops file in System32 directory 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 21 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Transferencia.exe"C:\Users\Admin\AppData\Local\Temp\Transferencia.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Transferencia.exe"C:\Users\Admin\AppData\Local\Temp\Transferencia.exe"2⤵
- Checks QEMU agent file
- Checks computer location settings
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
memory/584-63-0x0000000002E70000-0x00000000040CA000-memory.dmp
memory/584-64-0x0000000002E70000-0x00000000040CA000-memory.dmp
memory/2036-65-0x0000000000400000-0x0000000001462000-memory.dmp
memory/2036-66-0x0000000001470000-0x00000000026CA000-memory.dmp
memory/2036-67-0x0000000000400000-0x0000000001462000-memory.dmp
memory/2036-88-0x0000000000400000-0x0000000001462000-memory.dmp
memory/2036-89-0x0000000001470000-0x00000000026CA000-memory.dmp
memory/2036-90-0x0000000001470000-0x00000000026CA000-memory.dmp
memory/2036-91-0x0000000000400000-0x0000000001462000-memory.dmp
memory/2036-93-0x0000000032A80000-0x0000000032D83000-memory.dmp