Analysis
- max time kernel
148s - max time network
156s - platform
windows10-2004_x64 - resource
win10v2004-20240419-en - resource tags
- submitted
02/05/2024, 02:04
General
- Target c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc.exe
- Size 426KB
- Sample240502-chcfqaea3t
- SHA256 c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.biotem.com.tr
-
Port
587
-
Username
-
Password
alesta.,alesta.,
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Detect packed .NET executables. Mostly AgentTeslaV4. 2 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 2 IoCs
- Detects executables referencing Windows vault credential objects. Observed in infostealers 2 IoCs
- Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
- Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
- Detects executables referencing many file transfer clients. Observed in information stealers 2 IoCs
- Loads dropped DLL 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.
- Legitimate hosting services abused for malware hosting/C2 1 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 NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc.exe"C:\Users\Admin\AppData\Local\Temp\c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc.exe"C:\Users\Admin\AppData\Local\Temp\c133857c1d5b7c0f19499dae8fc16c74fd34c67d095f84030b3026acd88e3fcc.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
memory/3684-28-0x0000000000470000-0x00000000004B2000-memory.dmp
memory/3684-32-0x00000000377A0000-0x00000000377F0000-memory.dmp
memory/3684-36-0x00000000016D0000-0x0000000003E9E000-memory.dmp
memory/3684-12-0x00000000016D0000-0x0000000003E9E000-memory.dmp
memory/3684-34-0x00000000378A0000-0x00000000378AA000-memory.dmp
memory/3684-14-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/3684-33-0x00000000377F0000-0x0000000037882000-memory.dmp
memory/3684-31-0x0000000034720000-0x0000000034786000-memory.dmp
memory/3684-27-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/3684-30-0x0000000036BB0000-0x0000000037154000-memory.dmp
memory/3792-13-0x0000000004B10000-0x00000000072DE000-memory.dmp
memory/3792-9-0x0000000004B10000-0x00000000072DE000-memory.dmp
memory/3792-10-0x00000000771E1000-0x0000000077301000-memory.dmp
memory/3792-29-0x0000000004B10000-0x00000000072DE000-memory.dmp
memory/3792-11-0x0000000010004000-0x0000000010005000-memory.dmp