84d27097f968478f99ce85e5589d2c99a0155c841a3f3e411f90ebc85e3aacd6

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:27

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General

Target

2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe
Size

40KB
MD5

d1c10c14d41be94da84953576be54b59
SHA1

29cf4ca0bb840b33ef6f04b82734ebc9c35f63d6
SHA256

84d27097f968478f99ce85e5589d2c99a0155c841a3f3e411f90ebc85e3aacd6
SHA512

8f811b2421a6010dc2dc829727a1fdd341b7fff10b145897fe76e501699e0382e170aa891361f6a65e6e9a0471df6672018b38dc6670d1b1c05c2b08a9963535
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYY:qDdFJy3QMOtEvwDpjjWMl7TF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4376-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4376-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4376-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4376-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4376-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4376-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4376 asih.exe

pid	process
4376	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4376-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4376-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe

description	pid	process	target process
PID 5108 wrote to memory of 4376	5108	2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe	asih.exe
PID 5108 wrote to memory of 4376	5108	2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe	asih.exe
PID 5108 wrote to memory of 4376	5108	2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_d1c10c14d41be94da84953576be54b59_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4376

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
d5589192ed3a8753e91ee69b1ffbc3cb

SHA1
b36d2d40341c822b44d90bb5cbf1e6430677eb6c

SHA256
af6f72166891cd3c0d7e8e11853d4ba8c2d06793ff58a2d2a696143b1b5a7ca8

SHA512
e69210dbb59ed82d1e822816264a9aa19130730d703dbe4afc9d65128441b264e7aef6914658bfcc43f82823e86f5cbd18646ac6ccb01b5ef3f545f40a1a58c7

Download Submit
memory/4376-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4376-22-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4376-27-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4376-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5108-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5108-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5108-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5108-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download