Analysis
- max time kernel
143s - max time network
110s - platform
windows10-2004_x64 - resource
win10v2004-20230220-en - resource tags
- submitted
21/02/2023, 14:21
General
- Target TSL Company RFQ PDF.exe
- Size 287KB
- Sample230221-rn2p5aha3w
- SHA256 4716f5a7d91fdb1c91bd3c3aaf4b776af86eb218a50efc55bd5ea2085f6f658f
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Executes dropped EXE 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- 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 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- 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 SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\TSL Company RFQ PDF.exe"C:\Users\Admin\AppData\Local\Temp\TSL Company RFQ PDF.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\eduqbovc.exe"C:\Users\Admin\AppData\Local\Temp\eduqbovc.exe" C:\Users\Admin\AppData\Local\Temp\yrbjkgze.xez2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\eduqbovc.exe"C:\Users\Admin\AppData\Local\Temp\eduqbovc.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
eduqbovc.exe
eduqbovc.exe
eduqbovc.exe
irjgfuvjug.t
yrbjkgze.xez
memory/1128-148-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-152-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-144-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1128-146-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1128-147-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-141-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1128-149-0x0000000004A50000-0x0000000004FF4000-memory.dmp
memory/1128-150-0x0000000005000000-0x0000000005066000-memory.dmp
memory/1128-151-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-143-0x0000000000400000-0x0000000000441000-memory.dmp
memory/1128-153-0x0000000006030000-0x00000000060C2000-memory.dmp
memory/1128-154-0x0000000006170000-0x000000000617A000-memory.dmp
memory/1128-155-0x0000000006360000-0x00000000063B0000-memory.dmp
memory/1128-156-0x00000000063B0000-0x0000000006572000-memory.dmp
memory/1128-157-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-159-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-160-0x0000000004A40000-0x0000000004A50000-memory.dmp
memory/1128-161-0x0000000004A40000-0x0000000004A50000-memory.dmp