Analysis
- max time kernel
40s - max time network
116s - platform
windows7_x64 - resource
win7-20240704-en - resource tags
- submitted
25/08/2024, 09:21
General
- Target RFQ #HU4759GK3891.scr.exe
- Size 698KB
- Sample240825-lbbqaawfpe
- SHA256 4b24c70ea3b3b855220f38d41b54c8c00a2e1f9c8fdfb3432c6bb9ab30480e64
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.merlinmotorworks.com
-
Port
587
-
Username
-
Password
Merlin1080S
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- 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.
- 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 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 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 16 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 21 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\RFQ #HU4759GK3891.scr.exe"C:\Users\Admin\AppData\Local\Temp\RFQ #HU4759GK3891.scr.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\RFQ #HU4759GK3891.scr.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\vmWHtb.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vmWHtb" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA11F.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Local\Temp\RFQ #HU4759GK3891.scr.exe"C:\Users\Admin\AppData\Local\Temp\RFQ #HU4759GK3891.scr.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
tmpA11F.tmp
Z1WZ2BBDAKGUQ706PE48.temp
memory/1052-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1052-21-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-23-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-25-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-27-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-31-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-32-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1052-30-0x0000000000400000-0x0000000000442000-memory.dmp
memory/1732-7-0x0000000000380000-0x000000000038C000-memory.dmp
memory/1732-1-0x0000000000CE0000-0x0000000000D94000-memory.dmp
memory/1732-2-0x0000000074770000-0x0000000074E5E000-memory.dmp
memory/1732-8-0x0000000004780000-0x0000000004804000-memory.dmp
memory/1732-3-0x0000000000210000-0x0000000000222000-memory.dmp
memory/1732-0-0x000000007477E000-0x000000007477F000-memory.dmp
memory/1732-6-0x0000000000370000-0x0000000000378000-memory.dmp
memory/1732-5-0x0000000074770000-0x0000000074E5E000-memory.dmp
memory/1732-4-0x000000007477E000-0x000000007477F000-memory.dmp
memory/1732-33-0x0000000074770000-0x0000000074E5E000-memory.dmp