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Analysis
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max time kernel
149s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240319-en -
resource tags
arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system -
submitted
27/03/2024, 17:49
Static task
static1
Behavioral task
behavioral1
Sample
15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe
Resource
win10v2004-20240319-en
General
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Target
15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe
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Size
35KB
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MD5
ef6aff1c3857293362924a4a7ffeb8ac
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SHA1
5bcd17af196edfbee1a1ae8ded04807000dd5a3c
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SHA256
15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e
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SHA512
681d31bb1dd967cac47ec2d8ac240627d1242e87bc6d61588c214c39d30c3c9ef6bacf3235098db9491d58811cea725c02dc2e61459c66202ef39c460b76b8b6
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SSDEEP
768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPb6b:YGzl5wjRQBBOsP1QMOtEvwDpjgarJb
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/4644-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000800000002335f-13.dat CryptoLocker_rule2 behavioral2/memory/4644-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4644-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000800000002335f-13.dat CryptoLocker_set1 behavioral2/memory/4644-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation 15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe -
Executes dropped EXE 1 IoCs
pid Process 1784 asih.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 4644 wrote to memory of 1784 4644 15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe 95 PID 4644 wrote to memory of 1784 4644 15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe 95 PID 4644 wrote to memory of 1784 4644 15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe 95
Processes
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C:\Users\Admin\AppData\Local\Temp\15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe"C:\Users\Admin\AppData\Local\Temp\15fe618d8e827be3368fde96b031e617f1b5d0a491e7f301197039274c27938e.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4644 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1784
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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=4168 --field-trial-handle=2288,i,11069632825633797559,14829202121434726371,262144 --variations-seed-version /prefetch:81⤵PID:1600
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
35KB
MD5936d0589287f5718bbab3e40c38278bb
SHA1affc83e5301e34f30eaddbe04230cc98a0b593aa
SHA256f3eb17514730195a49e00d35ebaecb9dee20aebdc72c782e4551c1218f0b157a
SHA512cf57243b9380852935c96d5106875152ef65c1515a419d33522f37599ec803ade934c220ed37a43b21170669d29be7e81e5e2b22263c75f758907a9a459ff93d