Analysis
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max time kernel
146s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 22:14
Behavioral task
behavioral1
Sample
2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe
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Size
41KB
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MD5
eac309ce599ba3c9b813d3c972d12a16
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SHA1
baf65739a1f2688e12dad91dabebdde409355525
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SHA256
fe6bbcaec64241f1ca753d992e3d432818b7415b3b65868b8bc8181be9237f43
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SHA512
0c2cd9028eb0a94aae2fbdedd46c5957f9a04032188b3e0c01cca763f7143f7e042fb37e13d23ae0e0b7c85f91a4781b6c3d73a86408986bd34a6d0e570bfebd
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9hT:qDdFJy3QMOtEvwDpjjWMl7TG
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002325a-13.dat CryptoLocker_rule2 behavioral2/memory/4552-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002325a-13.dat CryptoLocker_set1 behavioral2/memory/4552-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000800000002325a-13.dat UPX behavioral2/memory/4552-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/680-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
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 2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 680 asih.exe -
resource yara_rule behavioral2/memory/4552-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000800000002325a-13.dat upx behavioral2/memory/4552-25-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/680-27-0x0000000000500000-0x0000000000510000-memory.dmp upx -
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 4552 wrote to memory of 680 4552 2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe 92 PID 4552 wrote to memory of 680 4552 2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe 92 PID 4552 wrote to memory of 680 4552 2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_eac309ce599ba3c9b813d3c972d12a16_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4552 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:680
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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=1032 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:81⤵PID:5076
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD5e3961939866b0f0afb9ef6eee44f4577
SHA1d36fa0cc909a13e946c7eaca8f98ec64ae4428ae
SHA2564268f77ee4484f20f075d951e66ff87e1a47f87989565b6f98c40cc3623f802b
SHA512457546c62bd2f0cff6d11032dd9674da3565536fa04f83f38800057707be0d40cc89561b47b32890f332e8424a24c422121c07a010da5244349e437fe0f3b316