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Analysis
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max time kernel
147s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
06/03/2024, 01:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe
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Size
61KB
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MD5
2dcd3ea6c4e00777181b7824e09d6a59
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SHA1
37306abcab5540fc37f68af6db1a6b429cdb1e79
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SHA256
fe8d62008ecbdcf55a19ea2c83d266090bec39f460a8ab6b876e0da133a87796
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SHA512
7f8ba5b3f8f2d91f8c7601f14ae6c85d751f0a69324b07b635514b03902a23b7c16ac023dbb148aa8cf312af3ed57c74bda7137a8063afa4a3a3e4a00c190cb9
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsxa:BbdDmjr+OtEvwDpjM8A
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002333b-13.dat CryptoLocker_rule2 behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/3100-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002333b-13.dat UPX behavioral2/memory/3100-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3624-26-0x0000000000500000-0x0000000000510000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation 2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3624 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 3100 wrote to memory of 3624 3100 2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe 98 PID 3100 wrote to memory of 3624 3100 2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe 98 PID 3100 wrote to memory of 3624 3100 2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_2dcd3ea6c4e00777181b7824e09d6a59_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3100 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3624
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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=3724 --field-trial-handle=2972,i,4036376905309803364,5412922217215781933,262144 --variations-seed-version /prefetch:81⤵PID:1364
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
62KB
MD5f9747e0457a8742465deaacbad2d53bf
SHA19fa787e30f781bdc72aff9e2fadb8a88f0e74527
SHA256afed1417bc0a696e179aa68887829e851f307f78cdf995a613afb2cade4e583b
SHA5123c9d6577052a38262c37721c864db7c2d60cca45d81e9207043a4ea82c74e9eb32ac68718e94eb9a91049c6d98d07f0da65097307bdd4aef94e5edee52420bfb