Analysis
- max time kernel
125s - max time network
51s - platform
windows10-2004_x64 - resource
win10v2004-20231130-en - resource tags
- submitted
06/12/2023, 04:06
General
- Target Rybkdr.exe
- Size 1.1MB
- Sample231206-epg1wsba53
- SHA256 eea977d6c736325a557a0c31552c49c51399748fc138db772735109fb6510757
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.asiaparadisehotel.com
-
Port
587
-
Username
-
Password
S,i*jv&Bj09k
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Detect PureLogs payload 1 IoCs
- PureLogs
PureLogs is an infostealer 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 1 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\Rybkdr.exe"C:\Users\Admin\AppData\Local\Temp\Rybkdr.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\Rybkdr.exeC:\Users\Admin\AppData\Local\Temp\Rybkdr.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
Rybkdr.exe.log
memory/1232-0-0x0000000000740000-0x0000000000866000-memory.dmp
memory/1232-1-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/1232-2-0x00000000051E0000-0x000000000523A000-memory.dmp
memory/1232-3-0x00000000052F0000-0x0000000005300000-memory.dmp
memory/1232-4-0x0000000005240000-0x0000000005282000-memory.dmp
memory/1232-5-0x00000000052A0000-0x00000000052E0000-memory.dmp
memory/1232-6-0x0000000005300000-0x000000000534C000-memory.dmp
memory/1232-7-0x0000000005950000-0x0000000005EF4000-memory.dmp
memory/1232-12-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/4568-13-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/4568-9-0x0000000000400000-0x0000000000444000-memory.dmp
memory/4568-15-0x0000000005320000-0x0000000005386000-memory.dmp
memory/4568-14-0x00000000052C0000-0x00000000052D0000-memory.dmp
memory/4568-17-0x0000000006AC0000-0x0000000006B10000-memory.dmp
memory/4568-18-0x0000000006BB0000-0x0000000006C4C000-memory.dmp
memory/4568-19-0x0000000074B80000-0x0000000075330000-memory.dmp
memory/4568-20-0x00000000052C0000-0x00000000052D0000-memory.dmp
memory/4568-21-0x0000000006DF0000-0x0000000006E82000-memory.dmp
memory/4568-22-0x0000000006DC0000-0x0000000006DCA000-memory.dmp