Analysis Overview
SHA256
4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab
Threat Level: Known bad
The file 4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab was found to be: Known bad.
Malicious Activity Summary
ISR Stealer payload
Isrstealer family
ISR Stealer
Nirsoft
NirSoft MailPassView
UPX packed file
Reads user/profile data of web browsers
Accesses Microsoft Outlook accounts
Suspicious use of SetThreadContext
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-10-02 09:46
Signatures
ISR Stealer payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Isrstealer family
Analysis: behavioral1
Detonation Overview
Submitted
2022-10-02 09:46
Reported
2022-10-02 12:20
Platform
win7-20220812-en
Max time kernel
24s
Max time network
46s
Command Line
Signatures
ISR Stealer
NirSoft MailPassView
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Nirsoft
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Reads user/profile data of web browsers
Accesses Microsoft Outlook accounts
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 1808 set thread context of 1628 | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe |
| PID 1808 set thread context of 1584 | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
"C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe"
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\HmSOL9z2pe.ini"
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\nCwrp9Cqly.ini"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | texh.hj.cx | udp |
| DE | 64.190.63.111:80 | texh.hj.cx | tcp |
Files
memory/1628-56-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1628-57-0x00000000004512E0-mapping.dmp
memory/1628-59-0x0000000075211000-0x0000000075213000-memory.dmp
memory/1628-60-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1628-61-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1628-62-0x0000000000400000-0x0000000000453000-memory.dmp
memory/1628-63-0x0000000000400000-0x0000000000453000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\HmSOL9z2pe.ini
| MD5 | d1ea279fb5559c020a1b4137dc4de237 |
| SHA1 | db6f8988af46b56216a6f0daf95ab8c9bdb57400 |
| SHA256 | fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba |
| SHA512 | 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3 |
memory/1584-66-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1584-67-0x000000000041C410-mapping.dmp
memory/1584-70-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1584-71-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1584-72-0x0000000000400000-0x000000000041F000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-10-02 09:46
Reported
2022-10-02 12:20
Platform
win10v2004-20220812-en
Max time kernel
92s
Max time network
167s
Command Line
Signatures
NirSoft MailPassView
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Nirsoft
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Reads user/profile data of web browsers
Accesses Microsoft Outlook accounts
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4836 set thread context of 4756 | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe |
| PID 4836 set thread context of 1460 | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
"C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe"
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\9dSa6n8KoA.ini"
C:\Users\Admin\AppData\Local\Temp\4f851094891460acb9aee4b0273dc8f8b1dd760e63233daf93cdb21b57e8f3ab.exe
/scomma "C:\Users\Admin\AppData\Local\Temp\uWxqkozI0Q.ini"
Network
| Country | Destination | Domain | Proto |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| US | 8.8.8.8:53 | texh.hj.cx | udp |
| DE | 64.190.63.111:80 | texh.hj.cx | tcp |
| NL | 104.80.225.205:443 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| IE | 13.69.239.73:443 | tcp | |
| US | 93.184.220.29:80 | tcp |
Files
memory/4756-134-0x0000000000000000-mapping.dmp
memory/4756-135-0x0000000000400000-0x0000000000453000-memory.dmp
memory/4756-137-0x0000000000400000-0x0000000000453000-memory.dmp
memory/4756-138-0x0000000000400000-0x0000000000453000-memory.dmp
memory/4756-139-0x0000000000400000-0x0000000000453000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\9dSa6n8KoA.ini
| MD5 | d1ea279fb5559c020a1b4137dc4de237 |
| SHA1 | db6f8988af46b56216a6f0daf95ab8c9bdb57400 |
| SHA256 | fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba |
| SHA512 | 720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3 |
memory/1460-141-0x0000000000000000-mapping.dmp
memory/1460-142-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1460-144-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1460-145-0x0000000000400000-0x000000000041F000-memory.dmp
memory/1460-146-0x0000000000400000-0x000000000041F000-memory.dmp