Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
18/04/2026, 07:28
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe
Resource
win10v2004-20260130-en
6 signatures
150 seconds
Behavioral task
behavioral2
Sample
2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe
Resource
win11-20260130-en
5 signatures
150 seconds
General
- Target 2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe
- Size 40KB
- Sample260418-jay33saw2y
- SHA256 63363d3a26eb3aaff8699f7883962cd2afb38fb6607bad04d63c30e9a2b2ffd3
- MD5 204e68b504d5e3aae134422cfe12fb90
- SHA1 e25064d455160d9822a360d50a9189e0780b3a48
- SHA512 49e978e601f92ce0785419cbdb78408c31f92c0df1f57a759d50c73cd012f0475ee1dd7c3242a8b44e2ca71333841319ba88ae8b0339081b219ced32d69f758c
- SSDEEP 384:bgM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzorw7SigsXmyuvLVHN4X/xtBJ:blo/2n1TCraU6GD1a4XcsSKNuxNwKA
- TLSH T1AB034138BEE95972D377C67585F2A1C2B9367C123D06980E55CBA3880D33B5BBC90A1D
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/5112-2-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0016000000025a2d-13.dat CryptoLocker_rule2 behavioral2/memory/1556-19-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1556-21-0x0000000000400000-0x0000000000408000-memory.dmp CryptoLocker_rule2 - Executes dropped EXE 1 IoCs
pid Process 1556 rewok.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rewok.exe - Suspicious use of WriteProcessMemory 1 IoCs
description pid Process procid_target PID 5112 wrote to memory of 1556 5112 2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe"C:\Users\Admin\AppData\Local\Temp\2026-04-18_204e68b504d5e3aae134422cfe12fb90_cryptolocker_elex.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5112 -
C:\Users\Admin\AppData\Local\Temp\rewok.exe"C:\Users\Admin\AppData\Local\Temp\rewok.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:1556
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\rewok.exe
- Size 40KB
- SHA256 c0eab215d810ac2bb3e2787bab20c1f0be1a9ce6dfde92b243fd79925a96a136
- MD5 60c654519f660812bf8c58a58aa8db5f
- SHA1 1d6cdd00fee5f53a11f46d32ca17966732a79ddd
- SHA512 e76696c0cdf01e869eace1ddf0ac659b0556653295200121e5b93acba879a8f870c7b8d5b3ae74692a8edcd6b3e1a0d1aaefd85502492b745b41fa76ebec6854
- SSDEEP 384:bgM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzorw7SigsXmyuvLVHN4X/xtBq:blo/2n1TCraU6GD1a4XcsSKNuxNwK/
- TLSH T132035138BEE95972D377C67585F2A1C2B9367C123D06980E55CBA3880D33B5BBC90A1D
- MD5 SHA1 SHA512 SSDEEP TLSH