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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
31/05/2024, 20:27
Behavioral task
behavioral1
Sample
2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe
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Size
90KB
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MD5
53a2668143f5e807d3d60adab893e8d3
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SHA1
5060b5ffee8d8d20b803eafc3f9c33f27cf0eb5a
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SHA256
1621dbc1ba1fb655350be8b062311d823ddf51d9880f0a6d93b58184b46d600e
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SHA512
efd5e21570a51c1689a149de058e058130ca4e828d9b2cc2b0dbcf3d0a688e13ab946ee7272321ed1ad2466b76787e29455052f4b9a54143112b13acd8d52221
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyE:n6a+1SEOtEvwDpjYYvQd2PN
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3796-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000235bb-13.dat CryptoLocker_rule2 behavioral2/memory/2784-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3796-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2784-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3796-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000235bb-13.dat CryptoLocker_set1 behavioral2/memory/2784-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3796-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2784-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3796-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00090000000235bb-13.dat UPX behavioral2/memory/2784-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3796-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2784-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2784 asih.exe -
resource yara_rule behavioral2/memory/3796-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00090000000235bb-13.dat upx behavioral2/memory/2784-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3796-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2784-27-0x0000000000500000-0x0000000000510000-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 3796 wrote to memory of 2784 3796 2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe 90 PID 3796 wrote to memory of 2784 3796 2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe 90 PID 3796 wrote to memory of 2784 3796 2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-31_53a2668143f5e807d3d60adab893e8d3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3796 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2784
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4048,i,15140928051103392835,1612840580898364401,262144 --variations-seed-version --mojo-platform-channel-handle=4836 /prefetch:81⤵PID:1904
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD50d3b122650833e4e59e188ea7c642d53
SHA1b7fc5a0bd3d5496810288083b84aad3f540fba17
SHA256f9c704a5956a4d701acf043e9289d738892871ee3aefe0fe4898022a1491cd5c
SHA5129a3db6485db9c8928a5b3bc654652ba4460ab1a6dbedc9cb4efcdc02a943160aba18d064e6e22edbe24267ffd4e058588ae237254f4f35a13140d8010780de1c