Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/06/2024, 02:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe
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Size
47KB
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MD5
a3a9dd626a688327ca80c15d785ca282
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SHA1
f59b23609205260aa94f58077d432851787eb80a
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SHA256
7f4406ab86bc17d47f02ae640b5935358865109d4b8f2e5c67e5871c32582ca6
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SHA512
508f4e7c9fe1bfa0776c8348dde9311e048691b393b2bc797763538375ae471bdfc123ce3e447bf1fdd46e7dc1445d5a8fa96f141bca005f82c5b090b0fd2e06
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SSDEEP
768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLam5aFr7YOzzfm0EXsix:V6QFElP6n+gMQMOtEvwDpjyaYaFAh39x
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000900000002350b-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000900000002350b-12.dat 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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 760 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 4932 wrote to memory of 760 4932 2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe 91 PID 4932 wrote to memory of 760 4932 2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe 91 PID 4932 wrote to memory of 760 4932 2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_a3a9dd626a688327ca80c15d785ca282_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4932 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:760
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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 --field-trial-handle=2700,i,14648456027158448592,4956305794400220180,262144 --variations-seed-version --mojo-platform-channel-handle=4136 /prefetch:81⤵PID:2344
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
47KB
MD53f264bc0acae630d3487fd93adc95135
SHA14c162fc3fe599152d13d6b40cf3b442a4ff963d3
SHA256aa321c7bb31c9450c2df8e87d1a3b1f1391fbdf5de55e21014ee9dcd371cd839
SHA5123f28694fd09b9d4c0e5431c0ed3ab6cc26d2a0aafa5dffc493b3a0f9de39fb4bb6bf6199ba9c78a338ed1cfa43ed75bfa68709d59e0be760e9fae43a69b86bba