Analysis
- max time kernel
137s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
10/11/2022, 08:47
General
- Target Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe
- Size 55KB
- Sample221110-kpvvmsgdb7
- SHA256 f401e6678d1dc2b278bee5e0edb3236331ab655d151dea9f4166c31840ae2e13
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.jaazgroup.com
-
Port
587
-
Username
-
Password
cincin/123
-
Email to
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe"C:\Users\Admin\AppData\Local\Temp\Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwAwAA==2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe"C:\Users\Admin\AppData\Local\Temp\Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Invoice Overdue & Error INV NR 522236562 DTD 25.10.2021 SK.exe.log
memory/1052-144-0x0000000006650000-0x000000000666A000-memory.dmp
memory/1052-142-0x0000000006140000-0x000000000615E000-memory.dmp
memory/1052-141-0x0000000005B20000-0x0000000005B86000-memory.dmp
memory/1052-143-0x0000000007830000-0x0000000007EAA000-memory.dmp
memory/1052-138-0x0000000002B60000-0x0000000002B96000-memory.dmp
memory/1052-139-0x0000000005280000-0x00000000058A8000-memory.dmp
memory/1052-140-0x0000000005A00000-0x0000000005A66000-memory.dmp
memory/4540-134-0x0000000005840000-0x00000000058D2000-memory.dmp
memory/4540-136-0x0000000007040000-0x0000000007062000-memory.dmp
memory/4540-135-0x0000000005820000-0x000000000582A000-memory.dmp
memory/4540-132-0x0000000000E00000-0x0000000000E14000-memory.dmp
memory/4540-133-0x0000000005DF0000-0x0000000006394000-memory.dmp
memory/4876-146-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4876-148-0x0000000005280000-0x000000000531C000-memory.dmp
memory/4876-149-0x00000000063E0000-0x0000000006430000-memory.dmp