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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11/04/2024, 08:26
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe
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Size
41KB
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MD5
0d98162ccb08aed50e0d5b71695e44b0
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SHA1
4d7700ce777081aca6f1fc3479d3dccdf30400ae
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SHA256
0aaf43161802467482217f888e3cd14cdbd393ee1fa93e3be0d3888b4ef94b6a
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SHA512
65cea1a148b8fcfc8972406793f7bf1bf819c9f91b5e92a1d7a0747d099c00955397bcd98b88c48a9fd3f2dc1cedff4c11eb8f45eada254d2cee0cae32dfab19
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SSDEEP
768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMRYtsV:bc/y2lkF0+BlE
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00090000000224f7-12.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-1-5-21-275798769-4264537674-1142822080-1000\Control Panel\International\Geo\Nation 2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2704 rewok.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 3956 wrote to memory of 2704 3956 2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe 84 PID 3956 wrote to memory of 2704 3956 2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe 84 PID 3956 wrote to memory of 2704 3956 2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-11_0d98162ccb08aed50e0d5b71695e44b0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3956 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
PID:2704
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
42KB
MD517e5b9b7fc153a88c9df9cd87b5ece27
SHA1a7d6d1a849d39d74fff994d4d530e3cb39fba75b
SHA256faf2348241fe51195668161463fb37c4b3b85266e65ffeb5db40de30dd052937
SHA512292efe9198e0307f42a20f88a4ac11089df98275745baa9caeb53fb75cca35b06533f343d77ca575c33f29e9f625d6b2ac10afa6a55c314eb2cae95fbb11a607