Analysis
- max time kernel
150s - max time network
140s - platform
windows7_x64 - resource
win7-20230220-en - resource tags
- submitted
12/04/2023, 17:48
General
- Target Уведомително писмо_AWB_CI_76207886101.exe
- Size 404KB
- Sample230412-wdevtsdh68
- SHA256 ae7a2eab74a6dbeaa780094a1885f588405f0f8eda83910f14e22759d1f1b7aa
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.crai.com.ar
-
Port
587
-
Username
-
Password
Info2017
-
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.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 2 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- 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). Likely ransomware behaviour.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/660-107-0x0000000000E30000-0x000000000282A000-memory.dmp
memory/660-82-0x0000000000E30000-0x000000000282A000-memory.dmp
memory/660-83-0x0000000000400000-0x0000000000615000-memory.dmp
memory/660-102-0x0000000000E30000-0x000000000282A000-memory.dmp
memory/660-106-0x0000000000400000-0x0000000000615000-memory.dmp
memory/660-109-0x0000000000400000-0x0000000000430000-memory.dmp
memory/660-110-0x0000000033110000-0x0000000033150000-memory.dmp
memory/660-112-0x0000000033110000-0x0000000033150000-memory.dmp
memory/1276-81-0x0000000002F30000-0x000000000492A000-memory.dmp
memory/1276-80-0x0000000002F30000-0x000000000492A000-memory.dmp