Analysis
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max time kernel
139s -
max time network
119s -
platform
windows7_x64 -
resource
win7-en-20211014 -
submitted
02-12-2021 13:02
General
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Target
Rechnung 3199900-331_pdf.exe
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Size
371KB
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MD5
f61fd26952407cbcc39a6d9a4d2d6016
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SHA1
0d83d119805a98932fa5456b00306c1f67bc8963
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SHA256
6ed006337881053687665f8b968447a18ba92ea31e4864f468e90d793ef78a68
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SHA512
94846215ac278b770c50b5c9c9435ff135f9a7fb169e6093cf119c4878fa18ccca2864fde88ce6a27a523467bfac135719d52af0bfab11ca774d098075d0a086
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
[email protected] - Password:
Serverwap2020A
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 4 IoCs
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Drops file in Drivers directory 1 IoCs
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Loads dropped DLL 1 IoCs
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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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Program crash 1 IoCs
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Suspicious behavior: EnumeratesProcesses 6 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 15 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\Rechnung 3199900-331_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Rechnung 3199900-331_pdf.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Rechnung 3199900-331_pdf.exe"C:\Users\Admin\AppData\Local\Temp\Rechnung 3199900-331_pdf.exe"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 380 -s 9003⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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\Users\Admin\AppData\Local\Temp\nsyDB43.tmp\uzxhsjp.dllMD5
2081957ea1b2ce64a2faa6dff1ede2b7
SHA1058069e7571e2944a96eb22966003f3cba7c2f1b
SHA256da36c6482ad73b17eb62701fbf5f06723c3776d9c419ba90a7d75a75bdb20385
SHA512898110eda7a35e49191a0a722b802b18722f447ec1338646b30ce491eb8eebedf27fcd93117a260426102b194ae5047b8b1df8782dc36483736b18ea240a57f5
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memory/380-57-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/380-58-0x000000000040188B-mapping.dmp
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memory/380-60-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/380-61-0x0000000001EF0000-0x0000000001F27000-memory.dmpFilesize
220KB
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memory/380-64-0x00000000020F2000-0x00000000020F3000-memory.dmpFilesize
4KB
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memory/380-63-0x00000000020F1000-0x00000000020F2000-memory.dmpFilesize
4KB
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memory/380-65-0x00000000020F3000-0x00000000020F4000-memory.dmpFilesize
4KB
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memory/380-66-0x00000000020F4000-0x00000000020F5000-memory.dmpFilesize
4KB
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memory/1176-67-0x0000000000000000-mapping.dmp
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memory/1176-68-0x00000000002F0000-0x00000000002F1000-memory.dmpFilesize
4KB
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memory/1608-55-0x0000000075B71000-0x0000000075B73000-memory.dmpFilesize
8KB