Analysis
- max time kernel
126s - max time network
136s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
17/05/2024, 01:32
General
- Target Doc320785506.exe
- Size 66KB
- Sample240517-bybzfsbb2y
- SHA256 d920f54205824893b67562d371ea565dc2ae8f1dc02b6e2e079ff0ec246563e6
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
66.29.151.236
-
Port
587
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Username
-
Password
d9GOyTceXsMT
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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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 19 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Doc320785506.exe"C:\Users\Admin\AppData\Local\Temp\Doc320785506.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
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Mrmjzj.exe
memory/1616-11-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-59-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-3-0x00000000079C0000-0x0000000007BFC000-memory.dmp
memory/1616-4-0x00000000081B0000-0x0000000008754000-memory.dmp
memory/1616-5-0x0000000007CA0000-0x0000000007D32000-memory.dmp
memory/1616-9-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-15-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-31-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-35-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-39-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-51-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-57-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-55-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-53-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-49-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-47-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-45-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-37-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-33-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-29-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-43-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-41-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-27-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-25-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-21-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-19-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-17-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-13-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-23-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-0-0x00000000747EE000-0x00000000747EF000-memory.dmp
memory/1616-2-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/1616-7-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-69-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-67-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-65-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-63-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-6-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-61-0x00000000079C0000-0x0000000007BF6000-memory.dmp
memory/1616-4886-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/1616-4888-0x0000000006000000-0x000000000604C000-memory.dmp
memory/1616-4887-0x0000000006570000-0x00000000065E8000-memory.dmp
memory/1616-4900-0x0000000006740000-0x0000000006794000-memory.dmp
memory/1616-1-0x0000000000D80000-0x0000000000D92000-memory.dmp
memory/1616-4906-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/1676-4905-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/1676-9802-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/1676-9796-0x0000000005B90000-0x0000000005BE4000-memory.dmp
memory/1676-9795-0x00000000086D0000-0x00000000087D2000-memory.dmp
memory/1676-4914-0x00000000082D0000-0x0000000008596000-memory.dmp
memory/1676-4908-0x0000000004DB0000-0x0000000004DB6000-memory.dmp
memory/1676-4901-0x0000000000560000-0x000000000057A000-memory.dmp
memory/5144-9801-0x0000000000590000-0x000000000064A000-memory.dmp
memory/5144-9803-0x0000000004920000-0x00000000049E6000-memory.dmp
memory/5144-10656-0x0000000004D50000-0x0000000004D58000-memory.dmp
memory/5144-10657-0x0000000004D60000-0x0000000004DB6000-memory.dmp
memory/5168-4911-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/5168-4910-0x00000000747E0000-0x0000000074F90000-memory.dmp
memory/5168-4909-0x0000000004E10000-0x0000000004E76000-memory.dmp
memory/5168-4913-0x0000000006120000-0x000000000612A000-memory.dmp
memory/5168-4912-0x00000000060B0000-0x0000000006100000-memory.dmp
memory/5168-4907-0x0000000000760000-0x00000000007A0000-memory.dmp
memory/5168-10658-0x00000000747E0000-0x0000000074F90000-memory.dmp