Analysis
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max time kernel
147s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
24/04/2024, 05:47
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe
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Size
62KB
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MD5
a29b4e73afa09890850d2cb52346e29a
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SHA1
f35216fd12e496b5f62fecb5c6e90530acaf43c7
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SHA256
69e55199015bbab8bfc5b3e496526fff6dc05767d8dbad88dafc784ee437444a
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SHA512
8d1709bca370629755b654eea0a0f83b39d2975a88c43729fd62508364e163f655b9bb495a0ef679650e46803a2d4a7915c8c30f69b1fedd5a5434c8bf809e78
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiZ:BbdDmjr+OtEvwDpjM8Y
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/956-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000023285-13.dat CryptoLocker_rule2 behavioral2/memory/956-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4344-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/956-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4344-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/956-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0009000000023285-13.dat UPX behavioral2/memory/956-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4344-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4344 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
description pid Process procid_target PID 956 wrote to memory of 4344 956 2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe 91 PID 956 wrote to memory of 4344 956 2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe 91 PID 956 wrote to memory of 4344 956 2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-24_a29b4e73afa09890850d2cb52346e29a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:956 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4344
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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 --mojo-platform-channel-handle=1416 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:81⤵PID:3744
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
62KB
MD5f2cb432c5c1b7230d82d1de7e8194381
SHA19fd554f35512ce6fe2bb965675c16ec3e5f5f57a
SHA2567e5f53d139e855717b967f482f09b88e465f6ed1dddeceeb1090c87fd16bb39e
SHA5120fb21fb984d9f917a656b138464ed39866d3c5f3ddff366bcb84735d1215c78a081737b1287a71579d0cca97e52603fadc35ae8b41921520a456876740a35a7e