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Analysis
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max time kernel
145s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12/02/2024, 10:09
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe
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Size
50KB
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MD5
bbcfa420393ba88747997001a324df66
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SHA1
364e5054cd41970d434681b167534fd8ceaa137e
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SHA256
30de0c8ecfabe15d96fe1ebd6c689ebb17d768a91ebc540bb12ee6c1d442c486
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SHA512
c30653bdb2956356e3944751a45dab065b3dab236baa6a0727ff4b7da5ef56fcdc133adf3799aa6f61171e50c89d17203d5d1c4b6dcfb5a9911c669826ba5100
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SSDEEP
768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MzF3D:i5nkFGMOtEvwDpjNbwQEqD
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4468-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000e000000023167-13.dat CryptoLocker_rule2 behavioral2/memory/4468-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1816-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1816-55-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4468-16-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1816-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1816-55-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/4468-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x000e000000023167-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4468-16-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/1816-18-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/1816-55-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation 2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 1816 misid.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 4468 wrote to memory of 1816 4468 2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe 85 PID 4468 wrote to memory of 1816 4468 2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe 85 PID 4468 wrote to memory of 1816 4468 2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-12_bbcfa420393ba88747997001a324df66_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4468 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1816
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
50KB
MD5c5a03ea8e97d364e8d189907abdc392c
SHA1bc191e9cafdbaea5dfb48afcbbda127811fe8372
SHA256885b357195650cdb5a8a2eb183a8d7303c808d2760ae8f650fb825b416ac8602
SHA512031293f475c09ed56501355a9e4571bbdeadcb82186bf573efc2d8c3825aea7549fc9c2730c130857ac585405a8a20459bf5c2849cc0c0d2e378afafec9ca3da