Analysis
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max time kernel
126s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
25/04/2024, 04:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe
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Size
42KB
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MD5
3b05b83bad2ea449253c73fc6f96d0d2
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SHA1
260b3ffbc4a527215dd4eeb42284c6097989e01d
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SHA256
33743ebaf50fc6aed826fac05a48d8a5f61701c73e40cb6104b45235e56f10b0
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SHA512
5e41eca41835e59b2491079fe65a163489146abc4d928744fc9008953d9b155636e0a66715e127c8c112ff19aa81688dc1e34d2e9d78e8f02daa5da4b6114ba0
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlmoHR8uye/:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZL/
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000800000002325a-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 2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1248 retln.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 3184 wrote to memory of 1248 3184 2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe 90 PID 3184 wrote to memory of 1248 3184 2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe 90 PID 3184 wrote to memory of 1248 3184 2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-25_3b05b83bad2ea449253c73fc6f96d0d2_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3184 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:1248
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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=3020 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:81⤵PID:1768
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
42KB
MD5c3e9f910712dffc03177ee543f13af6e
SHA18e8cc8954c6988d4dc24221b136dda1f731ed6c9
SHA25656f5ccd7b3d30af0518fc13a6696bac3bb9d623ab40349a627258e75af918d2a
SHA512b4ea554c7469355895ba5e9a5382230be856d4283f51370a216b3b3b4d2131ad24f8179b9fceff7b5a69553823cc17b27c5125d44b7aa5b78e0b43aed365127a