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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 01:54
Behavioral task
behavioral1
Sample
2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe
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Size
66KB
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MD5
c8c47bbe15ddb306d145294faa77a015
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SHA1
cd99f1c72c3b89ea1e341be3921cff037df1d00b
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SHA256
c9037d56250b2d6a329b4ac71ca28ad0abbc764f46c19ef9ed5e856eff9e3f13
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SHA512
6b3bacfb8b3c529cdb0a85ccea9ad9f790179eab0517b06284d848777f6739774461e4c314061491a6b71fb291eafb3faaa69771292dea6f9d7c899fab507d61
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UncY:1nK6a+qdOOtEvwDpjc
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e96f-13.dat CryptoLocker_rule2 behavioral2/memory/2908-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/772-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2908-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e96f-13.dat CryptoLocker_set1 behavioral2/memory/2908-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/772-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2908-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000300000001e96f-13.dat UPX behavioral2/memory/2908-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/772-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2908-27-0x0000000000500000-0x000000000050F311-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation 2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2908 asih.exe -
resource yara_rule behavioral2/memory/772-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000300000001e96f-13.dat upx behavioral2/memory/2908-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/772-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2908-27-0x0000000000500000-0x000000000050F311-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 772 wrote to memory of 2908 772 2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe 86 PID 772 wrote to memory of 2908 772 2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe 86 PID 772 wrote to memory of 2908 772 2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c8c47bbe15ddb306d145294faa77a015_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:772 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2908
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
66KB
MD5d83a7d54e4f403913ed00b488320428b
SHA17eb7df0ea8fddbd684b0b53ecf7348838d8b39ab
SHA2566702871a46e614588eb02be1c5a7ae9867af9d41fb7ce3a2bd87a5518f194094
SHA51288d0281d01f317e53d1b4b38fc22c91fb75d0379cde2dd84d7384a31dfedc5c242ee43b76426ad89e56e9a6ada23325944883d2bd6e678e01534054ae9ccfeb1