Analysis
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max time kernel
152s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
27/05/2024, 18:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe
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Size
41KB
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MD5
a1911cf727fe388c5a6806262a0a78ef
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SHA1
67ed1ddc0eee967d8e3d894df0b1a494b91948de
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SHA256
96b4bd5b7368b7edebc5a515978c32be9373046ec3488cb1ae6741eb8519c548
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SHA512
fd617374bd764ab99e18193f1cb756f8d9bb3dea299f8b86824f74285b901434db23f49f53b9007d38f0ad1862801f1ae185f2bea2d13f0a78da9de710ca1695
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uyvT:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZ6T
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000800000002326c-12.dat CryptoLocker_rule2 -
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 2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1640 retln.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 4964 wrote to memory of 1640 4964 2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe 89 PID 4964 wrote to memory of 1640 4964 2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe 89 PID 4964 wrote to memory of 1640 4964 2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_a1911cf727fe388c5a6806262a0a78ef_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4964 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:1640
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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=4140 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:81⤵PID:4636
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5830634c406589c2469c155a650eacf8c
SHA19704f506599b910e43245d77aa637d250ff70e55
SHA256858d80c54c4054f77da3c66de98caa79cff6befdea99090e7c91b4d8a1818e17
SHA5125ed1f6eafc4dc935f323e89a55315590a33609bf154c34f1e48b5f3612f42749dbb0a204c26170ea9a4bd132b48a96143f95c77d32c3f1abc68888f7ff69a3ff