Analysis
- max time kernel
126s - max time network
129s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 19:49
General
- Target Invoice.bat.exe
- Size 934KB
- Sample201109-87ba2czxee
- SHA256 4100195b2a039c4612c9f9fc847470f49bf3e42978cb62fd24c8d9e8fd4324d8
Malware Config
Extracted
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Protocol
smtp
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Host
smtp.yandex.com
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Port
587
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Username
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Password
yfsntztrdonybvxb
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- CoreEntity .NET Packer 1 IoCs
A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.
- AgentTesla Payload 1 IoCs
- rezer0 3 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 2 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 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 28 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Invoice.bat.exe"C:\Users\Admin\AppData\Local\Temp\Invoice.bat.exe"1⤵
- 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\pQlvvOoz" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA907.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Invoice.bat.exe"{path}"2⤵
- 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\oToUjZkhZcmcz" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB23E.tmp"3⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Invoice.bat.exe"{path}"3⤵
- 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\uvNdZrydO" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB82A.tmp"4⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile4⤵
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/2208-5-0x0000000009FA0000-0x0000000009FA1000-memory.dmp
memory/2208-9-0x000000000D380000-0x000000000D383000-memory.dmp
memory/2208-10-0x0000000004B50000-0x0000000004C05000-memory.dmp
memory/2208-11-0x0000000004CC0000-0x0000000004CC1000-memory.dmp
memory/2208-8-0x0000000004540000-0x0000000004541000-memory.dmp
memory/2208-16-0x00000000058E0000-0x000000000598D000-memory.dmp
memory/2208-4-0x000000000A4A0000-0x000000000A4A1000-memory.dmp
memory/2208-3-0x0000000006ED0000-0x0000000006F9F000-memory.dmp
memory/2208-0-0x0000000073300000-0x00000000739EE000-memory.dmp
memory/2208-1-0x0000000000150000-0x0000000000151000-memory.dmp
memory/3256-20-0x0000000073300000-0x00000000739EE000-memory.dmp
memory/3256-27-0x0000000005C90000-0x0000000005D11000-memory.dmp
memory/3256-31-0x00000000068C0000-0x0000000006939000-memory.dmp
memory/3256-17-0x0000000000400000-0x00000000004B4000-memory.dmp
memory/3652-41-0x0000000008FB0000-0x0000000009003000-memory.dmp
memory/3652-34-0x0000000073300000-0x00000000739EE000-memory.dmp
memory/3652-32-0x0000000000400000-0x0000000000480000-memory.dmp
memory/3652-45-0x0000000009B60000-0x0000000009BAC000-memory.dmp
memory/3652-46-0x00000000079A0000-0x00000000079A1000-memory.dmp
memory/3652-47-0x0000000007A50000-0x0000000007A51000-memory.dmp