Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
17/05/2024, 02:00
General
- Target d920f54205824893b67562d371ea565dc2ae8f1dc02b6e2e079ff0ec246563e6.exe
- Size 66KB
- Sample240517-ce5cbscc8w
- SHA256 d920f54205824893b67562d371ea565dc2ae8f1dc02b6e2e079ff0ec246563e6
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
66.29.151.236
-
Port
587
-
Username
-
Password
d9GOyTceXsMT
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- PureLog Stealer
PureLog Stealer is an infostealer written in C#.
- PureLog Stealer payload 2 IoCs
- Detect packed .NET executables. Mostly AgentTeslaV4. 1 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
- Detects executables packed with SmartAssembly 1 IoCs
- Detects executables referencing Windows vault credential objects. Observed in infostealers 1 IoCs
- Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 1 IoCs
- Detects executables referencing many email and collaboration clients. Observed in information stealers 1 IoCs
- Detects executables referencing many file transfer clients. Observed in information stealers 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
- 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.
- Adds Run key to start application 2 TTPs 2 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 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 19 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\d920f54205824893b67562d371ea565dc2ae8f1dc02b6e2e079ff0ec246563e6.exe"C:\Users\Admin\AppData\Local\Temp\d920f54205824893b67562d371ea565dc2ae8f1dc02b6e2e079ff0ec246563e6.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Mrmjzj.exe"C:\Users\Admin\AppData\Local\Temp\Mrmjzj.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
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-
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Mrmjzj.exe
memory/1124-4910-0x0000000004E20000-0x0000000004E86000-memory.dmp
memory/1124-10657-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/1124-4908-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/1124-5755-0x00000000062F0000-0x00000000062FA000-memory.dmp
memory/1124-5688-0x0000000006280000-0x00000000062D0000-memory.dmp
memory/1124-4909-0x0000000000800000-0x0000000000840000-memory.dmp
memory/1124-4911-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/3476-9795-0x0000000005990000-0x0000000005A92000-memory.dmp
memory/3476-4912-0x0000000005AD0000-0x0000000005D96000-memory.dmp
memory/3476-9801-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/3476-4906-0x00000000008C0000-0x00000000008C6000-memory.dmp
memory/3476-4903-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/3476-4900-0x00000000000D0000-0x00000000000EA000-memory.dmp
memory/4088-27-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-67-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-17-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-13-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-11-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-7-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-6-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-59-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-65-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-63-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-61-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-57-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-55-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-53-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-51-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-49-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-47-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-45-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-43-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-41-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-39-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-37-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-35-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-0-0x0000000074F0E000-0x0000000074F0F000-memory.dmp
memory/4088-69-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-4886-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/4088-4888-0x0000000005B60000-0x0000000005BAC000-memory.dmp
memory/4088-4887-0x0000000005AB0000-0x0000000005B28000-memory.dmp
memory/4088-19-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-33-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-4901-0x0000000005E90000-0x0000000005EE4000-memory.dmp
memory/4088-23-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-25-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-4907-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/4088-29-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-31-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-21-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-15-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-9-0x0000000007350000-0x0000000007586000-memory.dmp
memory/4088-5-0x0000000007630000-0x00000000076C2000-memory.dmp
memory/4088-4-0x0000000007B40000-0x00000000080E4000-memory.dmp
memory/4088-3-0x0000000007350000-0x000000000758C000-memory.dmp
memory/4088-2-0x0000000074F00000-0x00000000756B0000-memory.dmp
memory/4088-1-0x0000000000750000-0x0000000000762000-memory.dmp
memory/4296-9802-0x0000000004C30000-0x0000000004CF6000-memory.dmp
memory/4296-10655-0x00000000050A0000-0x00000000050A8000-memory.dmp
memory/4296-10656-0x00000000050B0000-0x0000000005106000-memory.dmp
memory/4296-9800-0x0000000000400000-0x00000000004BA000-memory.dmp