Analysis
- max time kernel
60s - max time network
146s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 19:52
General
- Target 18 05_00011004_CGS4250954pdf.exe
- Size 473KB
- Sample201109-brtp68tka6
- SHA256 a0735e24f44ac731da4ae122e5ab82c4612042758c7e7cc4373eb76107125241
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.karmachalets.co.in
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Port
587
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Username
-
Password
Akshya@123
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.karmachalets.co.in
-
Port
587
-
Username
-
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 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.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 14 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\tmp5951.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
Loading Replay Monitor...
Downloads
memory/4172-23-0x0000000006230000-0x0000000006231000-memory.dmp
memory/4172-22-0x0000000005660000-0x0000000005661000-memory.dmp
memory/4172-17-0x0000000073360000-0x0000000073A4E000-memory.dmp
memory/4172-14-0x0000000000400000-0x0000000000452000-memory.dmp
memory/4760-5-0x0000000005840000-0x0000000005841000-memory.dmp
memory/4760-11-0x0000000006610000-0x0000000006611000-memory.dmp
memory/4760-10-0x0000000005F30000-0x0000000005F83000-memory.dmp
memory/4760-9-0x0000000005DC0000-0x0000000005DC2000-memory.dmp
memory/4760-8-0x0000000005670000-0x0000000005671000-memory.dmp
memory/4760-0-0x0000000073360000-0x0000000073A4E000-memory.dmp
memory/4760-4-0x000000000A080000-0x000000000A081000-memory.dmp
memory/4760-3-0x0000000007B20000-0x0000000007B7B000-memory.dmp
memory/4760-1-0x0000000000E00000-0x0000000000E01000-memory.dmp