44881fe8a9b95ecb1d12aef035b89ffe751a42086e8f2dc5609afd9d78976e0a

Analysis

max time kernel
0s
max time network
34s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 16:26

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General

Target

2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe
Size

128KB
MD5

20a155bdb26d9b5228fc507cb76ea183
SHA1

95f440fa9d33be6b5acd8d74c552b5cb74c587d9
SHA256

44881fe8a9b95ecb1d12aef035b89ffe751a42086e8f2dc5609afd9d78976e0a
SHA512

8a2a00508aef996dab06e811c67d80e844b586f08d13a2d9a9b876f98a6b8df6f998b32924a4853c2ea8b1f59601247ad39e32541e59120210cd866976bc812b
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eI7w:AnBdOOtEvwDpj6zx

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231fa-13.dat	CryptoLocker_rule2
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231fa-13.dat	CryptoLocker_set1
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 3 IoCs

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00080000000231fa-13.dat	UPX
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4032	asih.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00080000000231fa-13.dat	upx
behavioral2/memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 4032	3008	2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe	87
PID 3008 wrote to memory of 4032	3008	2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe	87
PID 3008 wrote to memory of 4032	3008	2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_20a155bdb26d9b5228fc507cb76ea183_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
128KB

MD5
66fbfb60a0c66f9ef44835795b7adc4f

SHA1
d5d51449b94970e0352a07b6012b128f4f72c4cf

SHA256
5bd5aaa579662c8509d64dd33eac3c143ea21e985fd12174059f00ca6242bd9b

SHA512
9b2f7f1d97aaf1a87dc8c94f6089968fedfb97c8bcbf328de498e7cdfa7d9c685e196b84d1d9f0e4ffabc190374eea90c3ec47bbc6a39f41579fd474c460b716

Download Submit
memory/3008-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3008-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/3008-2-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/3008-3-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3008-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4032-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download