Analysis
- max time kernel
124s - max time network
132s - platform
windows10-2004_x64 - resource
win10v2004-20231127-en - resource tags
- submitted
02/12/2023, 09:11
General
- Target Rybkdr.exe
- Size 1.1MB
- Sample231202-k5pzbsbb43
- SHA256 eea977d6c736325a557a0c31552c49c51399748fc138db772735109fb6510757
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.asiaparadisehotel.com
-
Port
587
-
Username
-
Password
S,i*jv&Bj09k
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 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\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/1416-18-0x0000000006640000-0x00000000066DC000-memory.dmp
memory/1416-14-0x0000000004ED0000-0x0000000004EE0000-memory.dmp
memory/1416-22-0x0000000004ED0000-0x0000000004EE0000-memory.dmp
memory/1416-12-0x0000000074A20000-0x00000000751D0000-memory.dmp
memory/1416-21-0x0000000006740000-0x000000000674A000-memory.dmp
memory/1416-20-0x0000000006780000-0x0000000006812000-memory.dmp
memory/1416-19-0x0000000074A20000-0x00000000751D0000-memory.dmp
memory/1416-9-0x0000000000400000-0x0000000000444000-memory.dmp
memory/1416-17-0x0000000006550000-0x00000000065A0000-memory.dmp
memory/1416-15-0x0000000004FE0000-0x0000000005046000-memory.dmp
memory/1604-6-0x0000000004FB0000-0x0000000004FFC000-memory.dmp
memory/1604-4-0x0000000004EE0000-0x0000000004F22000-memory.dmp
memory/1604-13-0x0000000074A20000-0x00000000751D0000-memory.dmp
memory/1604-2-0x0000000004E60000-0x0000000004EBA000-memory.dmp
memory/1604-0-0x0000000074A20000-0x00000000751D0000-memory.dmp
memory/1604-7-0x0000000005600000-0x0000000005BA4000-memory.dmp
memory/1604-1-0x00000000003E0000-0x0000000000506000-memory.dmp
memory/1604-5-0x0000000004F70000-0x0000000004FB0000-memory.dmp
memory/1604-3-0x0000000004F60000-0x0000000004F70000-memory.dmp