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Analysis
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max time kernel
142s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20230703-en -
resource tags
arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system -
submitted
21/08/2023, 12:00
Static task
static1
Behavioral task
behavioral1
Sample
Remesas Aceptadas_PDF.exe
Resource
win7-20230712-en
Behavioral task
behavioral2
Sample
Remesas Aceptadas_PDF.exe
Resource
win10v2004-20230703-en
General
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Target
Remesas Aceptadas_PDF.exe
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Size
353KB
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MD5
5eac01eb48b833581db348bc8ab49932
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SHA1
76adbcf9ffd7c737a513c61412c74a8acb9832d2
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SHA256
b48a5ebf4d21ce938606b70952e053ff15581a50d96e1e2cec000a8173edade3
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SHA512
dddf71de0f660ef623811091c95f7779ffb14e1974b7fe83c37be570cd5c731470be3d6d2cf67ff2745e7c756acb6cd208c552428a9ddd86e66ff9487d636b2d
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SSDEEP
6144:kQ606xiZ8/J8UwuB58YjMo3LNkW0IqWNhPyXgeXyy4WUviQX2EMKedJje:fZ8/Sg8doLOWJd7DdevK
Malware Config
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
description ioc Process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe Remesas Aceptadas_PDF.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe caspol.exe -
Loads dropped DLL 2 IoCs
pid Process 3804 Remesas Aceptadas_PDF.exe 3804 Remesas Aceptadas_PDF.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 39 api.ipify.org 38 api.ipify.org -
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
pid Process 4388 caspol.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 3804 Remesas Aceptadas_PDF.exe 4388 caspol.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3804 set thread context of 4388 3804 Remesas Aceptadas_PDF.exe 90 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 1704 4388 WerFault.exe 90 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4388 caspol.exe 4388 caspol.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 3804 Remesas Aceptadas_PDF.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4388 caspol.exe -
Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 3804 wrote to memory of 4388 3804 Remesas Aceptadas_PDF.exe 90 PID 3804 wrote to memory of 4388 3804 Remesas Aceptadas_PDF.exe 90 PID 3804 wrote to memory of 4388 3804 Remesas Aceptadas_PDF.exe 90 PID 3804 wrote to memory of 4388 3804 Remesas Aceptadas_PDF.exe 90 PID 3804 wrote to memory of 4388 3804 Remesas Aceptadas_PDF.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\Remesas Aceptadas_PDF.exe"C:\Users\Admin\AppData\Local\Temp\Remesas Aceptadas_PDF.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3804 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Remesas Aceptadas_PDF.exe"2⤵
- Checks QEMU agent file
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4388 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4388 -s 25403⤵
- Program crash
PID:1704
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 4388 -ip 43881⤵PID:4116
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
11KB
MD59625d5b1754bc4ff29281d415d27a0fd
SHA180e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b
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Filesize
11KB
MD59625d5b1754bc4ff29281d415d27a0fd
SHA180e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b
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Filesize
11KB
MD59625d5b1754bc4ff29281d415d27a0fd
SHA180e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b