Analysis
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max time kernel
112s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 01:23
General
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Target
Reff # PO_67574 SN-3945 187809.exe
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Size
519KB
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MD5
2937291b0e76f9710529d315a15b2ead
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SHA1
4ed50482753f2f5001221c51b291247cd4cd9e58
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SHA256
52076bdaeca2aec859341f506d295ab541af5f1454be18dbf869694b613395c7
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SHA512
160197e2ef76d7628575a053b59fe92b97e002dae60fb19acbbd971b84395487d622d83c51ec2946e37af04596a27dd0e76e9389cbc60abcd0a745a4ff2f5938
Malware Config
Extracted
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
[email protected] - Password:
Starboy@22
Extracted
agenttesla
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
[email protected] - Password:
Starboy@22
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 1 IoCs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
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Suspicious use of SetThreadContext 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of SetWindowsHookEx 1 IoCs
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Suspicious use of WriteProcessMemory 11 IoCs
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outlook_office_path 1 IoCs
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outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Reff # PO_67574 SN-3945 187809.exe"C:\Users\Admin\AppData\Local\Temp\Reff # PO_67574 SN-3945 187809.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SnkbxiTB" /XML "C:\Users\Admin\AppData\Local\Temp\tmp178F.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Reff # PO_67574 SN-3945 187809.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp178F.tmpFilesize
1KB
MD55fcd8798ef89563738ace277f1ae8b14
SHA13933b719b5374c34c4f2ddea421de3da8b9a1735
SHA256cee95455fa653c055fba01a26d4aa67666b58da014210fad9ae215e1a1c6a965
SHA512d0d85f508a241da18fbf521b18208487e47d8d0480c9d7cb40557a308b9e52c5343fa62e0020290e92daea462c6e8c59bdd15f4244a0226bb3c5653f3f98bfdb
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memory/2852-137-0x0000000000000000-mapping.dmp
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memory/2852-138-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/2852-139-0x00000000056E0000-0x0000000005746000-memory.dmpFilesize
408KB
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memory/2852-140-0x0000000006530000-0x0000000006580000-memory.dmpFilesize
320KB
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memory/3372-130-0x0000000000150000-0x00000000001D8000-memory.dmpFilesize
544KB
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memory/3372-131-0x0000000007610000-0x0000000007BB4000-memory.dmpFilesize
5.6MB
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memory/3372-132-0x0000000007060000-0x00000000070F2000-memory.dmpFilesize
584KB
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memory/3372-133-0x0000000007100000-0x000000000710A000-memory.dmpFilesize
40KB
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memory/3372-134-0x000000000AB40000-0x000000000ABDC000-memory.dmpFilesize
624KB
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memory/4308-135-0x0000000000000000-mapping.dmp