Analysis
- max time kernel
115s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
21/05/2022, 02:53
General
- Target New Request.exe
- Size 553KB
- Sample220521-ddd97aaegq
- SHA256 0b6118c17d89a24512971b9190cf4e76b54e0f02cb06d23d899a17feb9fc64f3
Malware Config
Extracted
-
Protocol
smtp
-
Host
smtp.yandex.com
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Port
587
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Username
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Password
Starboy@22
Extracted
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agenttesla
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Protocol
smtp
-
Host
smtp.yandex.com
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Port
587
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Username
-
Password
Starboy@22
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- SnakeBOT
SnakeBOT is a heavily obfuscated .NET downloader.
- AgentTesla Payload 1 IoCs
- Contains SnakeBOT related strings 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 3 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\New Request.exe"C:\Users\Admin\AppData\Local\Temp\New Request.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\suCEFwS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE1BA.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\New Request.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\New Request.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\New Request.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\New Request.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
New Request.exe.log
tmpE1BA.tmp
memory/1268-141-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1268-143-0x0000000005EA0000-0x0000000005F06000-memory.dmp
memory/1268-144-0x00000000062B0000-0x0000000006300000-memory.dmp
memory/3100-133-0x0000000007DB0000-0x0000000007DBA000-memory.dmp
memory/3100-134-0x000000000B4D0000-0x000000000B56C000-memory.dmp
memory/3100-132-0x0000000007DE0000-0x0000000007E72000-memory.dmp
memory/3100-130-0x0000000000F70000-0x0000000001004000-memory.dmp
memory/3100-131-0x00000000082F0000-0x0000000008894000-memory.dmp