Analysis
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max time kernel
148s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
09/06/2024, 07:35
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe
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Size
47KB
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MD5
e39669415f908c3c7975f2977e207ca7
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SHA1
0ac0bdea06b4d823bece273d8321d91ad1e3470b
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SHA256
21fbbb42740331a233b03f870b5f6569da8e4bd3685a780cd4360b9cfc02fe65
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SHA512
4c27f77e3c3cead6cb5e7b42f008ea1d8c6fe3abe078d97464812de48a866eadfad9710787989958357dacb18478849c63381a1dced84b1b088f65bc53aab8ba
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SSDEEP
768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/Dpk0yR:P6Q0ElP6G+gJQMOtEvwDpjB8WMldyR
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4140-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002340c-13.dat CryptoLocker_rule2 behavioral2/memory/736-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4140-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/736-27-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4140-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000900000002340c-13.dat CryptoLocker_set1 behavioral2/memory/736-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/4140-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/736-27-0x0000000000500000-0x000000000050B000-memory.dmp 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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 736 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 4140 wrote to memory of 736 4140 2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe 81 PID 4140 wrote to memory of 736 4140 2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe 81 PID 4140 wrote to memory of 736 4140 2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_e39669415f908c3c7975f2977e207ca7_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4140 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:736
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
48KB
MD5c9287127c7c06d1a0e3ab26a8f62903e
SHA10e09055b04abdd2c835b0fe5f480d00542edf193
SHA256ab0a153fd3570efe34b2a6a115c9ee63213752f5cc6fb6e1b4002db321f446af
SHA512896064ec8f5cb77f41a5a7b3d5426cb4065da447ce1d1ca581d702da97b2cd6d41198deecad0bef5732cd016c7b542250ddc62197456e890b62f18deda1ed6b0