Analysis
- max time kernel
136s - max time network
137s - platform
windows10_x64 - resource
win10 - submitted
05/10/2020, 13:13
General
- Target Purchase Order.exe
- Size 651KB
- Sample201005-2wt17xs8sn
- SHA256 96c4bcff0df93379d1447731b9fd7738ded981e16b2a646668ae1bed2f72a320
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.swedish-hospital.com
-
Port
587
-
Username
-
Password
Swe2017?
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 2 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- 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.
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- 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 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order.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\nVBSuBHZh" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBC22.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Purchase Order.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/3676-5-0x00000000053B0000-0x00000000053B1000-memory.dmp
memory/3676-11-0x000000000DA20000-0x000000000DA21000-memory.dmp
memory/3676-6-0x0000000005F30000-0x0000000005F31000-memory.dmp
memory/3676-7-0x00000000057B0000-0x00000000057B4000-memory.dmp
memory/3676-8-0x0000000007C10000-0x0000000007C85000-memory.dmp
memory/3676-9-0x000000000A500000-0x000000000A56D000-memory.dmp
memory/3676-10-0x000000000D910000-0x000000000D911000-memory.dmp
memory/3676-0-0x0000000073BA0000-0x000000007428E000-memory.dmp
memory/3676-4-0x0000000005400000-0x0000000005401000-memory.dmp
memory/3676-3-0x0000000005A30000-0x0000000005A31000-memory.dmp
memory/3676-1-0x0000000000AD0000-0x0000000000AD1000-memory.dmp
memory/4040-14-0x0000000000400000-0x000000000043C000-memory.dmp
memory/4040-17-0x0000000073BA0000-0x000000007428E000-memory.dmp
memory/4040-22-0x00000000054B0000-0x00000000054B1000-memory.dmp