Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 02:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe
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Size
64KB
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MD5
b44162a871b70379e7182cb36675f60c
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SHA1
16dbd9fa399b57b5bf877429a2ebd9e3b26d396e
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SHA256
7fa575c788ec719399c765550df333257e44d663938b3589fd665f64ab6fdd55
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SHA512
969d3792a8e6a27eb4732d2a9545c9551e831c523de396e64bb166043db9dbc451ffcd28882bf5b6e4ee5d3c5e865b40a3d52f66f71b50ca0a1630f912b0dce7
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi1:BbdDmjr+OtEvwDpjM80
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3144-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3144-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
Processes:
resource yara_rule behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3144-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3144-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3144-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3144-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 3144 asih.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:
2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exedescription pid process target process PID 2964 wrote to memory of 3144 2964 2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe asih.exe PID 2964 wrote to memory of 3144 2964 2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe asih.exe PID 2964 wrote to memory of 3144 2964 2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_b44162a871b70379e7182cb36675f60c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.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\asih.exeFilesize
65KB
MD5e0af046042a405e45c3e88fd0332b70e
SHA1466cb3698d1c23973504e587faf642134af5012c
SHA2566848a19aa2d2e3ce2b7cfb76e0f600619c94ab5ed1110d44d39fcc07105682d5
SHA5124185862b81f4082354124ddea7ad1d48620a4e78a0ec67e49ab980d0509cea4a371eb1645672eb88624cb056c127bde158d19d59711dc7ee4526ed77934977aa
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memory/2964-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2964-1-0x00000000020E0000-0x00000000020E6000-memory.dmpFilesize
24KB
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memory/2964-2-0x0000000002100000-0x0000000002106000-memory.dmpFilesize
24KB
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memory/2964-9-0x00000000020E0000-0x00000000020E6000-memory.dmpFilesize
24KB
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memory/2964-17-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/3144-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/3144-21-0x00000000004F0000-0x00000000004F6000-memory.dmpFilesize
24KB
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memory/3144-20-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
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memory/3144-27-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB