Analysis
- max time kernel
100s - max time network
110s - platform
windows10_x64 - resource
win10v20201028 - submitted
04/02/2021, 09:25
General
- Target SecuriteInfo.com.Variant.Bulz.339626.3605.3322.exe
- Size 31KB
- Sample210204-84ba7rbtnx
- SHA256 cc82ca8892ee89608d68cfcbde5d4268cf57a62468eb5f4ab0e95d778f05a9eb
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
smtp.enttramas.com
-
Port
587
-
Username
-
Password
IReJRpH6
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.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 14 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.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 5 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\SecuriteInfo.com.Variant.Bulz.339626.3605.3322.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.339626.3605.3322.exe"1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout 12⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout 13⤵
- Delays execution with timeout.exe
-
-
-
C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.339626.3605.3322.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.339626.3605.3322.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/576-14-0x0000000006430000-0x0000000006431000-memory.dmp
memory/576-3-0x00000000004D0000-0x00000000004D1000-memory.dmp
memory/576-5-0x0000000004DD0000-0x0000000004DD1000-memory.dmp
memory/576-6-0x00000000057C0000-0x00000000057C1000-memory.dmp
memory/576-9-0x0000000002790000-0x0000000002791000-memory.dmp
memory/576-10-0x0000000005840000-0x0000000005887000-memory.dmp
memory/576-11-0x0000000005930000-0x0000000005931000-memory.dmp
memory/576-2-0x0000000073560000-0x0000000073C4E000-memory.dmp
memory/2228-17-0x0000000073560000-0x0000000073C4E000-memory.dmp
memory/2228-15-0x0000000000400000-0x000000000043C000-memory.dmp
memory/2228-21-0x0000000005730000-0x0000000005731000-memory.dmp
memory/2228-23-0x0000000005600000-0x0000000005601000-memory.dmp
memory/2228-24-0x00000000061F0000-0x00000000061F1000-memory.dmp
memory/2228-25-0x0000000006580000-0x0000000006581000-memory.dmp
memory/2228-26-0x0000000005A80000-0x0000000005A81000-memory.dmp