Analysis
-
max time kernel
147s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 02:50
Behavioral task
behavioral1
Sample
2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe
-
Size
74KB
-
MD5
c451fdde13b02fa7c73df943bf248b32
-
SHA1
fd89786bd8fd47ad82b019190fafc1b47c85fce9
-
SHA256
f4f83cb0f32ed8825c775ccc9f7127c446b1b5afaf7e8c540ae518767c455435
-
SHA512
44b5575d7ed3fda40aad537c58dc9b54673597f86aebfad7a9ed542fce6afc433677ea049c4332a7a75c4695a39f2559e94918aeb6946e63601dce5e0540e2db
-
SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81GH:1nK6a+qdOOtEvwDpjm
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3120-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3120-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/5088-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/5088-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3120-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3120-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/5088-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/5088-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3120-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3120-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/5088-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/5088-27-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation 2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 5088 asih.exe -
Processes:
resource yara_rule behavioral2/memory/3120-0-0x0000000000500000-0x000000000050F311-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3120-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/5088-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/5088-27-0x0000000000500000-0x000000000050F311-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exedescription pid process target process PID 3120 wrote to memory of 5088 3120 2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe asih.exe PID 3120 wrote to memory of 5088 3120 2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe asih.exe PID 3120 wrote to memory of 5088 3120 2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe asih.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-22_c451fdde13b02fa7c73df943bf248b32_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
74KB
MD5b2e04e03f244697e0310296da1f7b57f
SHA1e19d985bd1ad142c17b107626c51a41310fd66ac
SHA256a0829f2771b047bdfcbd283ca4c817916e57ace51cc81857a32f6761eacc42c3
SHA5127b212085b297f91dbc90b721b587b6e14821fd63e688d90b1dbc4fc48fcde466540460fcadf425323863722631164624778f85d32e26df2ec0119a6ff81cf746
-
memory/3120-0-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB
-
memory/3120-1-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
-
memory/3120-2-0x00000000004F0000-0x00000000004F6000-memory.dmpFilesize
24KB
-
memory/3120-9-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
-
memory/3120-17-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB
-
memory/5088-18-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB
-
memory/5088-20-0x0000000002080000-0x0000000002086000-memory.dmpFilesize
24KB
-
memory/5088-26-0x00000000005C0000-0x00000000005C6000-memory.dmpFilesize
24KB
-
memory/5088-27-0x0000000000500000-0x000000000050F311-memory.dmpFilesize
60KB