Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
27-04-2024 22:22
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe
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Size
54KB
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MD5
01775a7cc02daeec95be36d5f2574129
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SHA1
7c22a368771e137ab6406b9333f7dd4c5e13dad7
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SHA256
f7b6bdc0a07940881a59ad71ade8ca9abe2d5bf9252d6e232f4939a43105f0f5
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SHA512
1bd6bef2ede92742f65b425529dcbf00ce0f8a66fb7ba92d581c0420378b8457e39e875146bd63738e7e17a050c6a1012ae6928eb2b7f8cd9945ce568e398f61
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SSDEEP
768:bIDOw9UiaCHfjnE0Sfa7ilR0p9u6p4ICNBCXK9XbTb8pu6:bIDOw9a0DwitDZzcTL6
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\lossy.exe CryptoLocker_rule2 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation 2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
lossy.exepid process 2252 lossy.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exedescription pid process target process PID 116 wrote to memory of 2252 116 2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe lossy.exe PID 116 wrote to memory of 2252 116 2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe lossy.exe PID 116 wrote to memory of 2252 116 2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe lossy.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_01775a7cc02daeec95be36d5f2574129_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\lossy.exeFilesize
54KB
MD59179a159c7ab094c609712bbc91c7d19
SHA157621de66819d9f42a4021f4389320f6b7dd13cf
SHA2568cacff8cf748a18aae522f8a8cc287356194f4def38872f26f468c080b77bc08
SHA512b486f5c1c9293a98b87ad0c171d642fe63defd6c53817270b5fc34bebad76396caada3d5c0cb3689a1fb04bc633c056208e2237395c58d56126ffaa94984af4d
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memory/116-0-0x00000000021D0000-0x00000000021D6000-memory.dmpFilesize
24KB
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memory/116-1-0x0000000002070000-0x0000000002076000-memory.dmpFilesize
24KB
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memory/116-8-0x00000000021D0000-0x00000000021D6000-memory.dmpFilesize
24KB
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memory/2252-17-0x0000000002060000-0x0000000002066000-memory.dmpFilesize
24KB
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memory/2252-23-0x00000000005A0000-0x00000000005A6000-memory.dmpFilesize
24KB