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Analysis
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max time kernel
143s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
25/04/2024, 15:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe
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Size
96KB
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MD5
bc8b1eecd565287772776e7d1ae6a320
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SHA1
b757e94b1bd8d34856e216592eaf1de6a91784c8
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SHA256
7e7da5885a343d54128603cad73b2f2115f1a8e2dc931e92ba03fc931b622948
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SHA512
3e3a24e085a01ada3ef8ad120bf690c7d4afbfa47331183455391157254f5d3836cdc127c59b8246160c959c1a2142a959c8647cf8f30d99906120a12bd7bb7d
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SSDEEP
768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZ7uyA36S7MpxRiWNa9mktJvj8+:xj+VGMOtEvwDpjubwQEIiVmkPL
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000f000000023249-13.dat CryptoLocker_rule2 behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2592-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000f000000023249-13.dat CryptoLocker_set1 behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2592-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/3012-0-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000f000000023249-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/3012-19-0x0000000000500000-0x0000000000510000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/2592-26-0x0000000000500000-0x0000000000510000-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 2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2592 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 3012 wrote to memory of 2592 3012 2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe 90 PID 3012 wrote to memory of 2592 3012 2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe 90 PID 3012 wrote to memory of 2592 3012 2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-25_bc8b1eecd565287772776e7d1ae6a320_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3012 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2592
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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=1312 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:81⤵PID:2300
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
96KB
MD5df59ab107d67a040876dfb4812bf4396
SHA1891f91083325c42e438a1d3de42c7effdecbebbb
SHA256bc220f69e539bcf3f63d4761df39b06095a63962ab45287220ea693ac731f6b5
SHA512b24da5cd68855998146053b5ce9f5eb64db725b4145f5e3349f29419086008677f4fcbcb7953c65493a8bde73b096c2c98b0d9efa1c8a4ed80466397d7fdfff8