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Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
04/02/2024, 01:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe
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Size
41KB
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MD5
7af809d0746d698093e820a1d7a79449
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SHA1
87b642207feee28831dca098c027b2a29e937088
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SHA256
21722edb67a6233676f716930b03dae0f8647a78d839c297eadd24738913a847
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SHA512
e8a6855760c744fd66eff58793156f470ec501b562d9656cd2070d315ae1103c9ce26b68c34fd05854a36af90f5067aaa4ad85825fe92ddafeef56b247cd967a
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SSDEEP
768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAaV:b/pYayGig5HjS3NPAu
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0008000000023212-12.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation 2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4756 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 4980 wrote to memory of 4756 4980 2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe 85 PID 4980 wrote to memory of 4756 4980 2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe 85 PID 4980 wrote to memory of 4756 4980 2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-04_7af809d0746d698093e820a1d7a79449_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4980 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:4756
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD52622930b6c12564cf9cc5863e74e46e6
SHA1943ed8bf42c1f7f363cd0f4540f51a119b8b9807
SHA256480c93b99f64958a05b8b7d23db47b23881b07682433f0b14ac3a6075585c8ab
SHA5122e5b34315a9ce716269d3afca493a1d4c6e092ce259d12529ec5900316de163e8076222325b8568ec8fc5ec5decbb436295b06a724e6472d8271686acdb306a0