Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 04:41
Behavioral task
behavioral1
Sample
2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe
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Size
92KB
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MD5
4025e9ab35ae133335b3c99f5a14d796
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SHA1
9b0903beb769ae04d023aeffcaaa14aef9ddc65a
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SHA256
737affe979ce52bfa354fd63025cd8aa2146122d01c88270d3367b945d684cf1
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SHA512
5982da96526e3e1cf61d9a0d96e6e6be9be1f5946dd59c8ec38c08bd04de349303fc129f32016b6ec1905db446eb1aecd21bb6d20c3115e4addff4dce43b6351
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SSDEEP
1536:f6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAw:f6a+1SEOtEvwDpjYYvQd2Pw
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023288-13.dat CryptoLocker_rule2 behavioral2/memory/1008-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4512-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0006000000023288-13.dat CryptoLocker_set1 behavioral2/memory/1008-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4512-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0006000000023288-13.dat UPX behavioral2/memory/1008-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4512-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4512 asih.exe -
resource yara_rule behavioral2/memory/1008-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0006000000023288-13.dat upx behavioral2/memory/1008-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4512-26-0x0000000000500000-0x0000000000510000-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 1008 wrote to memory of 4512 1008 2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe 80 PID 1008 wrote to memory of 4512 1008 2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe 80 PID 1008 wrote to memory of 4512 1008 2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe 80
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_4025e9ab35ae133335b3c99f5a14d796_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1008 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4512
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
92KB
MD529fbea81a546579211387e171b11ab1e
SHA19838493a31647e6fbacd77f7bc22f45a5c2934bc
SHA25689353b349ad37bb7661e4d2fab92df99fcd518a9a5a3c5a37e5d5b06bd41f99b
SHA5120171b1bcb0fb92f37b9c5e42bf6c1e2413caad36d3bda6dbd75f000860f33566a4413cd444ffba5bf069437719cd33eb44843fa31e4177966dab1b98c2934c42