Analysis
- max time kernel
136s - max time network
146s - platform
windows10-2004_x64 - resource
win10v2004-20230220-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
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Protocol
smtp
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Host
mail.crai.com.ar
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Port
587
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Username
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Password
Info2017
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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
- 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.
- Program crash 1 IoCs
- Suspicious behavior: MapViewOfSection 4 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
Processes
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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
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Уведомително писмо_AWB_CI_76207886101.exe"2⤵
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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
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4296 -s 21763⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4296 -ip 42961⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/4176-159-0x00000000041B0000-0x0000000005BAA000-memory.dmp
memory/4176-160-0x00000000041B0000-0x0000000005BAA000-memory.dmp
memory/4296-176-0x0000000000400000-0x000000000062B000-memory.dmp
memory/4296-162-0x0000000000400000-0x000000000062B000-memory.dmp
memory/4296-172-0x0000000000F00000-0x00000000028FA000-memory.dmp
memory/4296-161-0x0000000000F00000-0x00000000028FA000-memory.dmp
memory/4296-177-0x0000000000F00000-0x00000000028FA000-memory.dmp
memory/4296-178-0x0000000000400000-0x0000000000430000-memory.dmp
memory/4296-179-0x0000000035F00000-0x00000000364A4000-memory.dmp
memory/4296-180-0x0000000000E70000-0x0000000000ED6000-memory.dmp
memory/4296-181-0x0000000035B20000-0x0000000035B30000-memory.dmp
memory/4296-182-0x0000000035E50000-0x0000000035EE2000-memory.dmp
memory/4296-183-0x0000000035DF0000-0x0000000035DFA000-memory.dmp
memory/4296-184-0x0000000000F00000-0x00000000028FA000-memory.dmp