Analysis
- max time kernel
146s - max time network
143s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
09/12/2024, 07:30
General
- Target Request for Quotation New collaboration.exe
- Size 710KB
- Sample241209-jbt6hsvrem
- SHA256 cb076958b9db298f34a9eeaafc4796f6d902b19b1696b76179db10612d371608
Malware Config
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Disables Task Manager via registry modification
- Loads dropped DLL 2 IoCs
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Looks up external IP address via web service 1 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).
- 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.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Request for Quotation New collaboration.exe"C:\Users\Admin\AppData\Local\Temp\Request for Quotation New collaboration.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Request for Quotation New collaboration.exe"C:\Users\Admin\AppData\Local\Temp\Request for Quotation New collaboration.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
memory/3544-15-0x00000000032D0000-0x000000000659D000-memory.dmp
memory/3544-16-0x0000000077C81000-0x0000000077DA1000-memory.dmp
memory/3544-17-0x0000000010004000-0x0000000010005000-memory.dmp
memory/3544-18-0x00000000032D0000-0x000000000659D000-memory.dmp
memory/5080-31-0x00000000004B0000-0x0000000001704000-memory.dmp
memory/5080-32-0x00000000004B0000-0x00000000004CE000-memory.dmp
memory/5080-33-0x0000000037890000-0x0000000037E34000-memory.dmp
memory/5080-34-0x00000000376A0000-0x000000003773C000-memory.dmp
memory/5080-36-0x0000000038080000-0x0000000038112000-memory.dmp
memory/5080-37-0x0000000038120000-0x0000000038170000-memory.dmp
memory/5080-38-0x00000000382B0000-0x0000000038472000-memory.dmp
memory/5080-39-0x0000000038540000-0x000000003854A000-memory.dmp