Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
01-05-2024 08:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe
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Size
56KB
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MD5
8cc06975b1620c3966116af1e1e36471
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SHA1
ce33e306f6ef1d49e438d64f7580d25083c1b2aa
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SHA256
f2fbf246009bb7f82f0301bc81608abd1dd9a34b9f5a62338b413e7fd938585d
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SHA512
a497b4831e09a5d2c1de8cf50f380f35d879602a84d46a3264f411815133d37c4af9a8535d1e8e59d00c95fc29f2e3d4210471feace07b1f1c67dae93732819f
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyJ:BbdDmjr+OtEvwDpjM+
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4948-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000d000000023b24-13.dat CryptoLocker_rule2 behavioral2/memory/4948-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1988-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4948-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1988-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4948-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000d000000023b24-13.dat UPX behavioral2/memory/4948-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1988-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1988-28-0x0000000000500000-0x0000000000510000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation 2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1988 asih.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 4948 wrote to memory of 1988 4948 2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe 83 PID 4948 wrote to memory of 1988 4948 2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe 83 PID 4948 wrote to memory of 1988 4948 2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-01_8cc06975b1620c3966116af1e1e36471_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4948 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1988
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
56KB
MD55c6aa9b9df0db27a0a75471133988fa2
SHA1681766f430571fc42d767086065d01d4ab124356
SHA2565ff664c3d0aab9b815022e66570e11db32be74d0d2e2ca7dc43dd2a6e713bdbd
SHA512aee7ddc199b14b9567f85a396f8e69b552ab67115379dca9452c3d299f3ea7ace8e0322d728f2e77d5154d9349d7c12d8857763196941fe25d8ffbc9f18d0249