Analysis
- max time kernel
142s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
22/08/2023, 07:51
General
- Target Akbank Hesap Özetiniz_PDF.exe
- Size 352KB
- Sample230822-jpvzzaag86
- SHA256 236c73a241d229cc820b4fa2aa914403151deb84b90939ac4760460fc107dda4
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
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 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\Akbank Hesap Özetiniz_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Akbank Hesap Özetiniz_PDF.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Akbank Hesap Özetiniz_PDF.exe"2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2872 -s 25283⤵
- Program crash
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2872 -ip 28721⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/2872-172-0x0000000033E60000-0x0000000033E70000-memory.dmp
memory/2872-168-0x0000000000590000-0x000000000131D000-memory.dmp
memory/2872-179-0x00000000720F0000-0x00000000728A0000-memory.dmp
memory/2872-177-0x0000000000590000-0x000000000131D000-memory.dmp
memory/2872-175-0x0000000034350000-0x00000000343A0000-memory.dmp
memory/2872-150-0x0000000000590000-0x000000000131D000-memory.dmp
memory/2872-151-0x0000000077858000-0x0000000077859000-memory.dmp
memory/2872-152-0x0000000000590000-0x000000000131D000-memory.dmp
memory/2872-153-0x0000000077875000-0x0000000077876000-memory.dmp
memory/2872-163-0x00000000737B0000-0x0000000074A04000-memory.dmp
memory/2872-167-0x00000000737B0000-0x0000000074A04000-memory.dmp
memory/2872-174-0x00000000777D1000-0x00000000778F1000-memory.dmp
memory/2872-169-0x00000000720F0000-0x00000000728A0000-memory.dmp
memory/2872-170-0x00000000737B0000-0x00000000737F4000-memory.dmp
memory/2872-171-0x0000000034420000-0x00000000349C4000-memory.dmp
memory/2872-173-0x0000000033C40000-0x0000000033CA6000-memory.dmp
memory/4664-145-0x00000000028D0000-0x000000000365D000-memory.dmp
memory/4664-146-0x00000000028D0000-0x000000000365D000-memory.dmp
memory/4664-149-0x0000000010000000-0x0000000010006000-memory.dmp
memory/4664-148-0x00000000777D1000-0x00000000778F1000-memory.dmp
memory/4664-147-0x00000000777D1000-0x00000000778F1000-memory.dmp