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Analysis
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max time kernel
151s -
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
28/03/2024, 00:41
Static task
static1
Behavioral task
behavioral1
Sample
2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe
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Size
43KB
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MD5
88ee7dbbbe2f4985b2d2c685c703dd63
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SHA1
ee60c9016837b2b0b5b5acb9fd9b709336e759b3
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SHA256
65ffa23bbd141a743074f61582619305e1e0ecd8428290a374f81ead89ff0625
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SHA512
9dec74df87c37521683328cf60fbaefc052d43acf98907fb6cb4858e638a2bf361dd07f1ec31a3215329b8dba91dbd87b65398bef24d0d42eac2f337e6ad74b8
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SSDEEP
768:bgX4zYcgTEu6QOaryfjqDDw3sCu5b+syQNA1:bgGYcA/53GADw8Cl/n1
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00030000000227e7-12.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 2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1404 hasfj.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 2272 wrote to memory of 1404 2272 2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe 97 PID 2272 wrote to memory of 1404 2272 2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe 97 PID 2272 wrote to memory of 1404 2272 2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-28_88ee7dbbbe2f4985b2d2c685c703dd63_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2272 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:1404
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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=3940 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:81⤵PID:2528
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD579b80f96510d69113f2a63dfb72aa911
SHA150262f7a2c0cba73c5bef42a13f263541ab53af5
SHA256713e5c9a61aaae6ce6b84b94a02abb37bace5ca19a7363ef608bae55c4131d4e
SHA512f233c8631af04fb5449fbdd4723df4789337fb8f4e93a631825acc2fb9e4b2876c6b0161e398b593c45efc86d97049da50262145dc04e564acfd6b206717c336