Analysis
- max time kernel
61s - max time network
13s - platform
windows7_x64 - resource
win7v20201028 - submitted
09/11/2020, 19:52
General
- Target 18 05_00011004_CGS4250954pdf.exe
- Size 473KB
- Sample201109-brtp68tka6
- SHA256 a0735e24f44ac731da4ae122e5ab82c4612042758c7e7cc4373eb76107125241
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.karmachalets.co.in
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Port
587
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Username
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Password
Akshya@123
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 4 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.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\18 05_00011004_CGS4250954pdf.exe"C:\Users\Admin\AppData\Local\Temp\18 05_00011004_CGS4250954pdf.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\tERBrzdfdn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp189F.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\18 05_00011004_CGS4250954pdf.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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/796-32-0x0000000000400000-0x0000000000452000-memory.dmp
memory/796-30-0x0000000000400000-0x0000000000452000-memory.dmp
memory/796-33-0x0000000000400000-0x0000000000452000-memory.dmp
memory/796-35-0x00000000741A0000-0x000000007488E000-memory.dmp
memory/1892-3-0x0000000000910000-0x000000000096B000-memory.dmp
memory/1892-24-0x0000000000500000-0x0000000000502000-memory.dmp
memory/1892-25-0x0000000005140000-0x0000000005193000-memory.dmp
memory/1892-1-0x0000000001100000-0x0000000001101000-memory.dmp
memory/1892-0-0x00000000741A0000-0x000000007488E000-memory.dmp