Analysis
- max time kernel
149s - max time network
152s - platform
windows10_x64 - resource
win10-en-20210920 - submitted
21/09/2021, 07:01
Static task
static1
Behavioral task
behavioral1
Sample
c9661caa38dea46ddd786a2f5fc23706.exe
Resource
win7-en-20210920
0 signatures
0 seconds
General
- Target c9661caa38dea46ddd786a2f5fc23706.exe
- Size 525KB
- Sample210921-hs86bsbcdp
- SHA256 3c95dfb117835ab0edf303278462ff7a513a8b65c8e91d85b918e2eeaf3b9fb2
- MD5 c9661caa38dea46ddd786a2f5fc23706
- SHA1 a1639ffb4e1d66574127871b5f3192f48796c3ab
- SHA512 1614ede8de0c8f30632d015031cc72f9617ec3374260abc96748be2840283fe1998e15005b0cf2070eaceec02c27e08b62c6c49a86ae754c499340af532aa551
- MD5 SHA1 SHA512
Malware Config
Signatures
- suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)
suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)
- Downloads MZ/PE file
- Executes dropped EXE 2 IoCs
pid Process 2788 seneTyeo8x.exe 344 sihost.exe - Loads dropped DLL 5 IoCs
pid Process 1820 c9661caa38dea46ddd786a2f5fc23706.exe 1820 c9661caa38dea46ddd786a2f5fc23706.exe 1820 c9661caa38dea46ddd786a2f5fc23706.exe 1820 c9661caa38dea46ddd786a2f5fc23706.exe 1820 c9661caa38dea46ddd786a2f5fc23706.exe - 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.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2820 schtasks.exe 3756 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 3424 timeout.exe - Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1820 wrote to memory of 2788 1820 c9661caa38dea46ddd786a2f5fc23706.exe 70 PID 1820 wrote to memory of 2788 1820 c9661caa38dea46ddd786a2f5fc23706.exe 70 PID 1820 wrote to memory of 2788 1820 c9661caa38dea46ddd786a2f5fc23706.exe 70 PID 1820 wrote to memory of 2980 1820 c9661caa38dea46ddd786a2f5fc23706.exe 71 PID 1820 wrote to memory of 2980 1820 c9661caa38dea46ddd786a2f5fc23706.exe 71 PID 1820 wrote to memory of 2980 1820 c9661caa38dea46ddd786a2f5fc23706.exe 71 PID 2980 wrote to memory of 3424 2980 cmd.exe 73 PID 2980 wrote to memory of 3424 2980 cmd.exe 73 PID 2980 wrote to memory of 3424 2980 cmd.exe 73 PID 2788 wrote to memory of 2820 2788 seneTyeo8x.exe 74 PID 2788 wrote to memory of 2820 2788 seneTyeo8x.exe 74 PID 2788 wrote to memory of 2820 2788 seneTyeo8x.exe 74 PID 344 wrote to memory of 3756 344 sihost.exe 77 PID 344 wrote to memory of 3756 344 sihost.exe 77 PID 344 wrote to memory of 3756 344 sihost.exe 77
Processes
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C:\Users\Admin\AppData\Local\Temp\c9661caa38dea46ddd786a2f5fc23706.exe"C:\Users\Admin\AppData\Local\Temp\c9661caa38dea46ddd786a2f5fc23706.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1820 -
C:\Users\Admin\AppData\Local\Temp\seneTyeo8x.exe"C:\Users\Admin\AppData\Local\Temp\seneTyeo8x.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2788 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"3⤵
- Creates scheduled task(s)
PID:2820
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C:\Windows\SysWOW64\cmd.execmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\c9661caa38dea46ddd786a2f5fc23706.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:2980 -
C:\Windows\SysWOW64\timeout.exetimeout /T 10 /NOBREAK3⤵
- Delays execution with timeout.exe
PID:3424
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:344 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"2⤵
- Creates scheduled task(s)
PID:3756
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