Analysis
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max time kernel
150s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
27/05/2024, 12:11
Behavioral task
behavioral1
Sample
2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe
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Size
52KB
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MD5
6584819104e2fceda94f06fa7ac7d556
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SHA1
69a258b2c1f9ab57bcfe0c08ff83d120ce9ad4f7
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SHA256
b21bc8fc04310760c0d5595516e1b80bdc402a0d15f1fd71b9869de65307d163
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SHA512
18ecf11899febafbe454e1266d9c2d0f4403a744a0c05073cf8a2183646425ca7d8614c19653789c172d02270c9d2074653c28de2f8138e88b46b386d815fac3
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SSDEEP
768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOj:bODOw9acifAoc+v4
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002297e-13.dat CryptoLocker_rule2 behavioral2/memory/2792-18-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2792-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/files/0x000900000002297e-13.dat UPX behavioral2/memory/2792-18-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/2792-27-0x0000000008000000-0x000000000800F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2792 lossy.exe -
resource yara_rule behavioral2/memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/files/0x000900000002297e-13.dat upx behavioral2/memory/2792-18-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/2792-27-0x0000000008000000-0x000000000800F000-memory.dmp upx -
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
description pid Process procid_target PID 1232 wrote to memory of 2792 1232 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe 81 PID 1232 wrote to memory of 2792 1232 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe 81 PID 1232 wrote to memory of 2792 1232 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:2792
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
52KB
MD5707ccc6d7a4b65ba6e8a54c11836455b
SHA195b1622b3b743e92300a5e3cf5f89ea7f6e2d176
SHA256ca0a52961524eef42a878c8fa067626aa0ae97cb8d3316f204639a571fe0a001
SHA512b444b490cddd382e6edf4ba119244008c16dbc9a101049c82de5cc2a077885cd67cec991218daf924d9f69700dde858e24cd74217b2d2d4bd5f27a09b388386d