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Analysis
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max time kernel
147s -
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
01/05/2024, 10:22
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe
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Size
37KB
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MD5
03fbce37e4e6808ca57e054bd6daa17e
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SHA1
7e9553c629f707f4f2478fd2694adbde3f206c93
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SHA256
3e0c47116373cfab04558f602b53701da88dfc42567007687146950d04d60997
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SHA512
c5216a2c7ea274f1f64fbea017842c5bf7529f6869ef5440ed511b604684a23068792a0551502b72b9c9fdce3c194145a7d0e95db10ff1ed1c3111798203ed27
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SSDEEP
768:b7o/2n1TCraU6GD1a4Xt9bRU6zA6o36mJ:bc/y2lLRU6zA6qJ
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000023262-13.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 2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2268 rewok.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 3640 wrote to memory of 2268 3640 2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe 89 PID 3640 wrote to memory of 2268 3640 2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe 89 PID 3640 wrote to memory of 2268 3640 2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-01_03fbce37e4e6808ca57e054bd6daa17e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3640 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:2268
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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=1040 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:81⤵PID:2824
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD5384bebec2a2041742f0365daa2168e8d
SHA188d7de0ad70084db3b77a89785b1e0f8091c644f
SHA256141a41dd50216c666a007af8403ec2d63a946e8ca0043cfeed0f383f7daa99c9
SHA5126ea9ed03bb335dc657045c5a07d2eb041bd47372d5d7f5b868a19afe675993ee9a888af0c73b9b8583f187d251098bea98f87108f81891813cdbb8dd9b25aff0