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, 01:11
Behavioral task
behavioral1
Sample
2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe
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Size
91KB
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MD5
9c4ada962ebdf0f1254afc212c77dd6b
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SHA1
adaa1a52cc22be446ba9b936c017be89ff84006d
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SHA256
3bb0b983639eb506c05b33dfdec8061b226b3bb6175d559419244634b6949a0e
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SHA512
42613b7d8010e7a7e998d455bbe49c1f3a93596164ddcc3c129ab5bc3e0ecc8f5a31f074d0a4bbf6a00c3bdce32e21709a05f69ed3b48debd1d688584d7e8213
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyI:n6a+1SEOtEvwDpjYYvQd2PB
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00080000000233ee-13.dat CryptoLocker_rule2 behavioral2/memory/3948-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/976-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3948-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00080000000233ee-13.dat CryptoLocker_set1 behavioral2/memory/3948-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/976-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3948-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00080000000233ee-13.dat UPX behavioral2/memory/3948-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/976-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3948-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3948 asih.exe -
resource yara_rule behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00080000000233ee-13.dat upx behavioral2/memory/3948-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/976-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3948-27-0x0000000000500000-0x0000000000510000-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 976 wrote to memory of 3948 976 2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe 82 PID 976 wrote to memory of 3948 976 2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe 82 PID 976 wrote to memory of 3948 976 2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_9c4ada962ebdf0f1254afc212c77dd6b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:976 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3948
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
91KB
MD5e5092896f37d580fe522f4e6239a7aae
SHA17c03b9ec02a6cd97998029b44a6bfb25b5622f04
SHA256379d81c849374ab0f0f02212bb8d44c919cb4a59d22d248c291efbda4f026eaf
SHA5123d59dec7895d28fdecea6c06cd4ecb0bdfc72e76845ecefcc31addaf7ccd568255c4a8087703bc89cd35b70150634f363f2efbad84ab36eba881ed812ecd179a