Analysis
- max time kernel
68s - max time network
19s - platform
windows7_x64 - resource
win7v20201028 - submitted
09/11/2020, 19:44
General
- Target Revised Purchase Order PO) 12 05 20 - 64022 pdf..exe
- Size 644KB
- Sample201109-4sffx18ffx
- SHA256 12e5755daaddafe1456ea2d7e8aa1731d1e6d00add4967859dc0c43bb760a920
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
mail.sparklife.net.nz
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Port
587
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Username
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Password
Spark123
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
- rezer0 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
- 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.
- 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 17 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order PO) 12 05 20 - 64022 pdf..exe"C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order PO) 12 05 20 - 64022 pdf..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\crgChjqwC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7687.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Revised Purchase Order PO) 12 05 20 - 64022 pdf..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
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Downloads
memory/1080-0-0x0000000074710000-0x0000000074DFE000-memory.dmp
memory/1080-1-0x0000000000B10000-0x0000000000B11000-memory.dmp
memory/1080-3-0x0000000000490000-0x0000000000493000-memory.dmp
memory/1080-4-0x0000000004460000-0x00000000044B3000-memory.dmp
memory/1576-7-0x0000000000400000-0x0000000000452000-memory.dmp
memory/1576-10-0x0000000000400000-0x0000000000452000-memory.dmp
memory/1576-9-0x0000000000400000-0x0000000000452000-memory.dmp
memory/1576-11-0x0000000074710000-0x0000000074DFE000-memory.dmp