Analysis
- max time kernel
133s - max time network
135s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
06/01/2023, 10:04
General
- Target f857735b668966b542097ff430592eb7.exe
- Size 446KB
- Sample230106-l3ydcsff78
- SHA256 e4ef15651aa011744cab2c3581c4ae6234744da855df26f50f63a64a2c1034f9
Malware Config
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Executes dropped EXE 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\f857735b668966b542097ff430592eb7.exe"C:\Users\Admin\AppData\Local\Temp\f857735b668966b542097ff430592eb7.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ezmhoya.exe"C:\Users\Admin\AppData\Local\Temp\ezmhoya.exe" C:\Users\Admin\AppData\Local\Temp\ccozs.ys2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ezmhoya.exe"C:\Users\Admin\AppData\Local\Temp\ezmhoya.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
ccozs.ys
ezmhoya.exe
ezmhoya.exe
ezmhoya.exe
fovaxh.r
memory/2560-139-0x0000000004950000-0x0000000004EF4000-memory.dmp
memory/2560-140-0x0000000000400000-0x0000000000440000-memory.dmp
memory/2560-141-0x0000000004F80000-0x000000000501C000-memory.dmp
memory/2560-142-0x0000000005980000-0x00000000059E6000-memory.dmp
memory/2560-143-0x0000000006290000-0x0000000006322000-memory.dmp
memory/2560-144-0x0000000006360000-0x000000000636A000-memory.dmp
memory/2560-145-0x00000000068F0000-0x0000000006940000-memory.dmp