Analysis
- max time kernel
118s - max time network
121s - platform
windows10_x64 - resource
win10 - submitted
13/10/2020, 07:57
General
- Target invoice pdf pdf pdf.exe
- Size 74KB
- Sample201013-cvaenmlwn2
- SHA256 39a76f88dd2a2ebc1ef8a21c852813b486cb969d062a973610b60eeaef436e11
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
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Host
smtp.privateemail.com
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Port
587
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Username
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Password
manofpeace123
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- AgentTesla Payload 2 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Drops startup file 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.
- 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.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Program crash 1 IoCs
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Drops startup file
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 42⤵
- Delays execution with timeout.exe
-
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C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"2⤵
-
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C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"C:\Users\Admin\AppData\Local\Temp\invoice pdf pdf pdf.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3608 -s 19162⤵
- Program crash
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2152-10-0x0000000073500000-0x0000000073BEE000-memory.dmp
memory/2152-8-0x0000000000400000-0x000000000043C000-memory.dmp
memory/2152-16-0x00000000052B0000-0x00000000052B1000-memory.dmp
memory/2152-18-0x0000000005E40000-0x0000000005E41000-memory.dmp
memory/2152-19-0x0000000005F00000-0x0000000005F01000-memory.dmp
memory/2800-15-0x0000000004C80000-0x0000000004C81000-memory.dmp
memory/3608-3-0x0000000005310000-0x0000000005311000-memory.dmp
memory/3608-1-0x0000000000AE0000-0x0000000000AE1000-memory.dmp
memory/3608-5-0x0000000005E10000-0x0000000005E5D000-memory.dmp
memory/3608-6-0x0000000006360000-0x0000000006361000-memory.dmp
memory/3608-7-0x0000000005F20000-0x0000000005F21000-memory.dmp
memory/3608-0-0x0000000073500000-0x0000000073BEE000-memory.dmp