Analysis
- max time kernel
47s - max time network
112s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:21
General
- Target Quotation.Ref#78665.Scan.exe
- Size 532KB
- Sample201109-mtsevgcm2x
- SHA256 83497e0090f1d2ee05ec4a24b60def09707801d0cd25f5a76ade33ae943ca4bd
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.ametropolis.com
-
Port
587
-
Username
-
Password
Gera5956
Extracted
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agenttesla
-
Protocol
smtp
-
Host
mail.ametropolis.com
-
Port
587
-
Username
-
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 2 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 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 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 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\lBjiAmhxv" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3CC0.tmp"2⤵
- Creates scheduled task(s)
-
-
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
-
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/188-23-0x0000000005120000-0x0000000005121000-memory.dmp
memory/188-18-0x0000000073A20000-0x000000007410E000-memory.dmp
memory/188-15-0x0000000000400000-0x0000000000450000-memory.dmp
memory/3980-7-0x000000000A400000-0x000000000A401000-memory.dmp
memory/3980-11-0x0000000006000000-0x0000000006001000-memory.dmp
memory/3980-12-0x00000000060A0000-0x00000000060A1000-memory.dmp
memory/3980-10-0x0000000005F00000-0x0000000005F51000-memory.dmp
memory/3980-9-0x00000000059A0000-0x00000000059A2000-memory.dmp
memory/3980-8-0x0000000005970000-0x0000000005971000-memory.dmp
memory/3980-0-0x0000000073A20000-0x000000007410E000-memory.dmp
memory/3980-4-0x0000000009E60000-0x0000000009E61000-memory.dmp
memory/3980-3-0x0000000005900000-0x000000000595C000-memory.dmp
memory/3980-1-0x0000000000FE0000-0x0000000000FE1000-memory.dmp