Analysis
- max time kernel
76s - max time network
116s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 19:36
General
- Target PO_20200505_192224p.doc.exe
- Size 468KB
- Sample201109-ba2dnl2tf2
- SHA256 da95177191327894415885bd683840bbe593fefbe4ea00a4b054c264a3e5e88d
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.toorsteel.com
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Port
587
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Username
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Password
6652372
Extracted
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agenttesla
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Protocol
smtp
-
Host
mail.toorsteel.com
-
Port
587
-
Username
-
Password
6652372
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 IoCs
- rezer0 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- 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.
- 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.
- Modifies registry key 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\PO_20200505_192224p.doc.exe"C:\Users\Admin\AppData\Local\Temp\PO_20200505_192224p.doc.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tEiJgunZclHOk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp76CC.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\PO_20200505_192224p.doc.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\PO_20200505_192224p.doc.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\REG.exeREG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer /v NoRun /t REG_DWORD /d 1 /f3⤵
- Modifies registry key
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2400-20-0x0000000005ED0000-0x0000000005ED1000-memory.dmp
memory/2400-19-0x0000000005410000-0x0000000005411000-memory.dmp
memory/2400-14-0x0000000073A20000-0x000000007410E000-memory.dmp
memory/2400-11-0x0000000000400000-0x0000000000452000-memory.dmp
memory/3980-0-0x0000000073A20000-0x000000007410E000-memory.dmp
memory/3980-8-0x000000000B470000-0x000000000B4C3000-memory.dmp
memory/3980-7-0x000000000B350000-0x000000000B351000-memory.dmp
memory/3980-6-0x0000000001990000-0x0000000001993000-memory.dmp
memory/3980-5-0x0000000007E10000-0x0000000007E11000-memory.dmp
memory/3980-4-0x0000000007D70000-0x0000000007D71000-memory.dmp
memory/3980-3-0x00000000081D0000-0x00000000081D1000-memory.dmp
memory/3980-1-0x0000000000FE0000-0x0000000000FE1000-memory.dmp