Analysis
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max time kernel
139s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20230221-en -
resource tags
arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system -
submitted
28-03-2023 06:58
Static task
static1
Behavioral task
behavioral1
Sample
Operaciones de Cuenta.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
Operaciones de Cuenta.exe
Resource
win10v2004-20230221-en
General
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Target
Operaciones de Cuenta.exe
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Size
678KB
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MD5
71b2e12765ab5b744e42aea118f2845d
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SHA1
8882d7c1ef14d140f9de727207a95ef5ffb68fd3
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SHA256
f6ff5a18073b56d3a8d83195fa49486e289524729a081b5e49664f38854fe7e3
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SHA512
67050f92dca57dc887d11736f7722c085e29b5a6e2974ff74e9ab2182856d6246ce113123a27ef13728d31ef2fab333cf677bf488f8f8ab400e65fd168262c20
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SSDEEP
12288:uMw4EAPcLqU6LfBVbPWxAeWqHpST3yZrn0aHDyq9DSXALFWscaLU2:uMwtAPcLqU6nPKAzR3yBDyq0G62
Malware Config
Extracted
snakekeylogger
Protocol: smtp- Host:
mail.eversafe.pt - Port:
587 - Username:
pulqueriamonteiro@eversafe.pt - Password:
Ev3rsaf3_2021 - Email To:
vbankz20@gmail.com
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger payload 2 IoCs
Processes:
resource yara_rule behavioral2/memory/2288-166-0x0000000000400000-0x000000000062B000-memory.dmp family_snakekeylogger behavioral2/memory/2288-168-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger -
Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
Processes:
Operaciones de Cuenta.execaspol.exedescription ioc process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe Operaciones de Cuenta.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe caspol.exe -
Loads dropped DLL 2 IoCs
Processes:
Operaciones de Cuenta.exepid process 1728 Operaciones de Cuenta.exe 1728 Operaciones de Cuenta.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
caspol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe Key opened \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe Key opened \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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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.
Processes:
flow ioc 57 checkip.dyndns.org -
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
Processes:
caspol.exepid process 2288 caspol.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
Operaciones de Cuenta.execaspol.exepid process 1728 Operaciones de Cuenta.exe 2288 caspol.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Operaciones de Cuenta.exedescription pid process target process PID 1728 set thread context of 2288 1728 Operaciones de Cuenta.exe caspol.exe -
Drops file in Windows directory 1 IoCs
Processes:
Operaciones de Cuenta.exedescription ioc process File opened for modification C:\Windows\resources\0409\Ledetekstens\smrokkerne\Slowheartedness.ini Operaciones de Cuenta.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 4500 2288 WerFault.exe caspol.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
caspol.exepid process 2288 caspol.exe 2288 caspol.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
Operaciones de Cuenta.exepid process 1728 Operaciones de Cuenta.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
caspol.exedescription pid process Token: SeDebugPrivilege 2288 caspol.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
Operaciones de Cuenta.exedescription pid process target process PID 1728 wrote to memory of 2288 1728 Operaciones de Cuenta.exe caspol.exe PID 1728 wrote to memory of 2288 1728 Operaciones de Cuenta.exe caspol.exe PID 1728 wrote to memory of 2288 1728 Operaciones de Cuenta.exe caspol.exe PID 1728 wrote to memory of 2288 1728 Operaciones de Cuenta.exe caspol.exe -
outlook_office_path 1 IoCs
Processes:
caspol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe -
outlook_win_path 1 IoCs
Processes:
caspol.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 22963⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2288 -ip 22881⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\nsd841A.tmp\AdvSplash.dllFilesize
6KB
MD51871af84805057b5ebc05ee46b56625d
SHA150e1c315ad30f5f3f300c7cd9dd0d5d626fe0167
SHA25662b3db0446750ca9fd693733eec927acc1f50012a47785343286e63b650b7621
SHA512c1979ee98dfdb807776c439218528d80b4b244a87e692f1538e40f9c2c82db8b77485eb1429325b6f44419bf1f4cd454e43ff381eff077a8b4f4d9eb0d7e54d4
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C:\Users\Admin\AppData\Local\Temp\nsd841A.tmp\System.dllFilesize
12KB
MD5564bb0373067e1785cba7e4c24aab4bf
SHA17c9416a01d821b10b2eef97b80899d24014d6fc1
SHA2567a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5
SHA51222c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472
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memory/1728-150-0x0000000006F60000-0x0000000009A85000-memory.dmpFilesize
43.1MB
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memory/1728-151-0x0000000006F60000-0x0000000009A85000-memory.dmpFilesize
43.1MB
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memory/2288-152-0x0000000000C00000-0x0000000003725000-memory.dmpFilesize
43.1MB
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memory/2288-153-0x0000000000C00000-0x0000000003725000-memory.dmpFilesize
43.1MB
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memory/2288-166-0x0000000000400000-0x000000000062B000-memory.dmpFilesize
2.2MB
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memory/2288-167-0x0000000000C00000-0x0000000003725000-memory.dmpFilesize
43.1MB
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memory/2288-168-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/2288-169-0x0000000036C80000-0x0000000037224000-memory.dmpFilesize
5.6MB
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memory/2288-170-0x0000000036610000-0x00000000366AC000-memory.dmpFilesize
624KB
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memory/2288-171-0x00000000008F0000-0x0000000000900000-memory.dmpFilesize
64KB
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memory/2288-173-0x0000000000C00000-0x0000000003725000-memory.dmpFilesize
43.1MB