Analysis
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max time kernel
143s -
max time network
152s -
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, 00:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe
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Size
102KB
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MD5
61038d922c70729ccdef0d8a65e5b0c0
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SHA1
66d2ca3a749ab88256146f8ffa81f64e95525795
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SHA256
07a948d3d8e4c2a18b69f8972ccaa4c829c094e37c2aae7654bd4a636bf47381
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SHA512
90db9124f3ec99b820c6d9c5e91ea3a6ad63bb8b24c7eff8d0e70fa7d3ac3089c40d3bc6d3c3607632c3a81527e83719d5d99582eabaca6ed54784984be9adfe
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJHlv/k2mwVek:xj+VGMOtEvwDpjubwQEIiVmkxv/yk
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4440-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002325d-13.dat CryptoLocker_rule2 behavioral2/memory/4440-22-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4440-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002325d-13.dat CryptoLocker_set1 behavioral2/memory/4440-22-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/4440-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000700000002325d-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4440-22-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2936-26-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress -
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 2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2936 misid.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 4440 wrote to memory of 2936 4440 2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe 99 PID 4440 wrote to memory of 2936 4440 2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe 99 PID 4440 wrote to memory of 2936 4440 2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe 99
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-06_61038d922c70729ccdef0d8a65e5b0c0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4440 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2936
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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=4204 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:81⤵PID:2116
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
102KB
MD5b8e238c75f520098cd0e89b63ffcead7
SHA1d781c7cb663a875695442a7a2bb44a396e47077a
SHA2563c42fb86d01bd3e3f4f747778fdf10f57f3f1a31e8c6cb271f1595eb13dc5d4b
SHA512745480a181ee2f2d8781a71be87b2095b147bf878b26aa292fa3c9509fcdd8051a7bf5abc37176278ee97d24e23b1173a71ed466b9529fe8c7ff1cf8229bea4a