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Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
11/05/2024, 05:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe
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Size
43KB
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MD5
1592e5a38867d4ad28f255b366161838
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SHA1
8e6cc4773ac52c0e95cf4a22345c61c8069a3215
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SHA256
da289e4a13fcf31d44979a1c1c8648ef0f918d00a1048ecb113f6f331076774f
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SHA512
a4f6a25d5ce2ce5f49584f2f8cf4a01344b3a14c1ca188b812c5b01497e57229a26cc8f80a60cb714655c99db558b3ae4d354171c43041c4b36f5b447adc44b0
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA1:b/pYayGig5HjS3NPA1
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000022f51-12.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3432 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 3220 wrote to memory of 3432 3220 2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe 83 PID 3220 wrote to memory of 3432 3220 2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe 83 PID 3220 wrote to memory of 3432 3220 2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-11_1592e5a38867d4ad28f255b366161838_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3220 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3432
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD556e26b35b8e309358282c10ba40092aa
SHA12b906edef1e6f1c4f3281fea1e8aec8c3e8335f3
SHA2565ac54651fd879fe879f8d8324492e59540f7921832506dbb78dac35a37171d4c
SHA512af3da9147fbb9e9ec4afdf38a80f5b2fecb281356ec70573ca82bfb3f360438d0c95b59a0580ca81db51a3ba714a3da6bf74ab46321d0535b3bccdccee9264be