Analysis
- max time kernel
141s - max time network
143s - platform
windows10_x64 - resource
win10v20201028 - submitted
10/11/2020, 13:43
General
- Target AWB - Invoices & Packing_List (ASGPT_01220113808130).exe
- Size 829KB
- Sample201110-4hzy71hly2
- SHA256 d29642be607daa745b16691e95ff38c4da4c0a935caec464cd3beb27afc3cb8f
Malware Config
Extracted
-
agenttesla
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Protocol
smtp
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Host
mail.kdk.vn
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Port
587
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Username
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Password
135790
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 IoCs
- 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.
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\AWB - Invoices & Packing_List (ASGPT_01220113808130).exe"C:\Users\Admin\AppData\Local\Temp\AWB - Invoices & Packing_List (ASGPT_01220113808130).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\zfvUTyF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp36B1.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\AWB - Invoices & Packing_List (ASGPT_01220113808130).exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\AWB - Invoices & Packing_List (ASGPT_01220113808130).exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\AWB - Invoices & Packing_List (ASGPT_01220113808130).exe"{path}"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1180-11-0x0000000008250000-0x00000000082B1000-memory.dmp
memory/1180-12-0x0000000008360000-0x0000000008361000-memory.dmp
memory/1180-5-0x0000000004EC0000-0x0000000004EC1000-memory.dmp
memory/1180-8-0x0000000004D00000-0x0000000004D01000-memory.dmp
memory/1180-9-0x00000000086D0000-0x00000000086D1000-memory.dmp
memory/1180-10-0x0000000005520000-0x0000000005534000-memory.dmp
memory/1180-0-0x0000000073D20000-0x000000007440E000-memory.dmp
memory/1180-4-0x00000000096A0000-0x00000000096A1000-memory.dmp
memory/1180-1-0x0000000000280000-0x0000000000281000-memory.dmp
memory/1180-3-0x0000000004C40000-0x0000000004CA8000-memory.dmp
memory/3900-15-0x0000000000400000-0x000000000043C000-memory.dmp
memory/3900-18-0x0000000073D20000-0x000000007440E000-memory.dmp
memory/3900-23-0x00000000052B0000-0x00000000052B1000-memory.dmp
memory/3900-24-0x0000000005E60000-0x0000000005E61000-memory.dmp