Analysis
- max time kernel
117s - max time network
119s - platform
windows7_x64 - resource
win7v20201028 - submitted
09/11/2020, 20:21
General
- Target Quotation.Ref#78665.Scan.exe
- Size 532KB
- Sample201109-mtsevgcm2x
- SHA256 83497e0090f1d2ee05ec4a24b60def09707801d0cd25f5a76ade33ae943ca4bd
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.ametropolis.com
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Port
587
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Username
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Password
Gera5956
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
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- rezer0 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- 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.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Quotation.Ref#78665.Scan.exe"C:\Users\Admin\AppData\Local\Temp\Quotation.Ref#78665.Scan.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- 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\lBjiAmhxv" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBFA7.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Quotation.Ref#78665.Scan.exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- 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/1552-20-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1552-17-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1552-19-0x0000000000400000-0x0000000000450000-memory.dmp
memory/1552-21-0x0000000074480000-0x0000000074B6E000-memory.dmp
memory/1916-9-0x00000000001C0000-0x0000000000201000-memory.dmp
memory/1916-11-0x0000000000270000-0x0000000000272000-memory.dmp
memory/1916-12-0x0000000000AD0000-0x0000000000B21000-memory.dmp
memory/1916-3-0x00000000008D0000-0x000000000092C000-memory.dmp
memory/1916-1-0x0000000000F50000-0x0000000000F51000-memory.dmp
memory/1916-0-0x0000000074480000-0x0000000074B6E000-memory.dmp