Analysis
- max time kernel
143s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
12/02/2024, 12:02
General
- Target Ynstr.exe
- Size 718KB
- Sample240212-n7fefsed98
- SHA256 f2a3d321b3fbb2d3be23e5416a82b92d9aa73c3573ef0630d0570483ced8a731
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.emulines.biz
-
Port
587
-
Username
-
Password
7FZLGL7DTG0F
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.emulines.biz
-
Port
587
-
Username
-
Password
7FZLGL7DTG0F
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Detect ZGRat V1 34 IoCs
- ZGRat
ZGRat is remote access trojan written in C#.
- 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 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Ynstr.exe"C:\Users\Admin\AppData\Local\Temp\Ynstr.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Ynstr.exeC:\Users\Admin\AppData\Local\Temp\Ynstr.exe2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Ynstr.exe.log
memory/804-1129-0x0000000074CF0000-0x00000000754A0000-memory.dmp
memory/804-1130-0x0000000000400000-0x0000000000442000-memory.dmp
memory/804-1131-0x0000000005330000-0x0000000005340000-memory.dmp
memory/804-1132-0x00000000054B0000-0x0000000005516000-memory.dmp
memory/804-1139-0x0000000005330000-0x0000000005340000-memory.dmp
memory/804-1138-0x0000000074CF0000-0x00000000754A0000-memory.dmp
memory/804-1137-0x0000000006CD0000-0x0000000006CDA000-memory.dmp
memory/804-1136-0x0000000006D40000-0x0000000006DD2000-memory.dmp
memory/804-1135-0x0000000006C00000-0x0000000006C9C000-memory.dmp
memory/804-1134-0x0000000006B10000-0x0000000006B60000-memory.dmp
memory/3308-36-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-48-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-10-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-12-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-14-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-16-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-18-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-20-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-22-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-24-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-26-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-28-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-30-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-32-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-34-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-6-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-40-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-38-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-42-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-44-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-46-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-8-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-50-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-52-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-54-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-56-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-58-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-60-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-62-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-64-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-66-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-68-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-1119-0x0000000005880000-0x0000000005890000-memory.dmp
memory/3308-1120-0x0000000005930000-0x0000000005931000-memory.dmp
memory/3308-1121-0x0000000005980000-0x00000000059C2000-memory.dmp
memory/3308-5-0x0000000005790000-0x0000000005842000-memory.dmp
memory/3308-4-0x0000000005A00000-0x0000000005B0A000-memory.dmp
memory/3308-3-0x0000000005EB0000-0x00000000064C8000-memory.dmp
memory/3308-2-0x0000000005790000-0x0000000005848000-memory.dmp
memory/3308-0-0x0000000000D90000-0x0000000000E4A000-memory.dmp
memory/3308-1-0x0000000074CF0000-0x00000000754A0000-memory.dmp
memory/3308-1122-0x0000000005B20000-0x0000000005B6C000-memory.dmp
memory/3308-1123-0x0000000006B00000-0x00000000070A4000-memory.dmp
memory/3308-1128-0x0000000074CF0000-0x00000000754A0000-memory.dmp