Analysis
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max time kernel
150s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
21-05-2024 15:45
Behavioral task
behavioral1
Sample
2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe
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Size
24KB
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MD5
871b5515c64891358b210eb49a0c2d7f
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SHA1
c59d23940a15b90bf00167c2d5dfea2f18a540d7
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SHA256
6822a63856e3199e9635640d448844db2da11daec50f239d461e9832050a1bd0
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SHA512
109a315fd6d14e0aeb3a91f8950ac4622a167ec6a7e9ce72332f601dff2ea365df4cc891ed9e32ed2377f4b7cb01ffbfbfc7ef76427024b0f069dbb06496f2df
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SSDEEP
384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ23/:bVCPwFRo6CpwXFXSqQXfjAsJ+/
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/464-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\hasfj.exe CryptoLocker_rule2 behavioral2/memory/464-17-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1624-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1624-27-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/464-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\hasfj.exe UPX behavioral2/memory/464-17-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/1624-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/1624-27-0x0000000008000000-0x000000000800E000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation 2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
hasfj.exepid process 1624 hasfj.exe -
Processes:
resource yara_rule behavioral2/memory/464-0-0x0000000008000000-0x000000000800E000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\hasfj.exe upx behavioral2/memory/464-17-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/1624-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/1624-27-0x0000000008000000-0x000000000800E000-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
Processes:
2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exedescription pid process target process PID 464 wrote to memory of 1624 464 2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe hasfj.exe PID 464 wrote to memory of 1624 464 2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe hasfj.exe PID 464 wrote to memory of 1624 464 2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe hasfj.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-21_871b5515c64891358b210eb49a0c2d7f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
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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=4000,i,1999448010053300448,1112699187621658374,262144 --variations-seed-version --mojo-platform-channel-handle=4212 /prefetch:81⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\hasfj.exeFilesize
24KB
MD5b1a08e7d87f216e88abaa28ed60a4468
SHA10aee0d0a61a6898bf631c09e70ddb06a0f80a229
SHA2567efc399ac0c09cd6e65b63c355dec25c174c0fa21e82c56b4c2a5a0337e2b2ce
SHA512821e30f45185583071cc6933e300d49445b56955c58528ab7fa3f5bfdeba050f4d6cb142557d4c2c49a92b89923a7f87844849b9af42c7aa2056e05346eb3b80
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memory/464-0-0x0000000008000000-0x000000000800E000-memory.dmpFilesize
56KB
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memory/464-1-0x0000000002250000-0x0000000002256000-memory.dmpFilesize
24KB
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memory/464-2-0x0000000002300000-0x0000000002306000-memory.dmpFilesize
24KB
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memory/464-9-0x0000000002250000-0x0000000002256000-memory.dmpFilesize
24KB
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memory/464-17-0x0000000008000000-0x000000000800E000-memory.dmpFilesize
56KB
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memory/1624-18-0x0000000008000000-0x000000000800E000-memory.dmpFilesize
56KB
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memory/1624-20-0x0000000003010000-0x0000000003016000-memory.dmpFilesize
24KB
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memory/1624-26-0x0000000002D60000-0x0000000002D66000-memory.dmpFilesize
24KB
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memory/1624-27-0x0000000008000000-0x000000000800E000-memory.dmpFilesize
56KB