aa4e68f37f862bafd449831a548c5928b7a7ad34e25e22def2d9a02d5b62aec4

Analysis

max time kernel
148s
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 01:39

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General

Target

2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe
Size

46KB
MD5

40e94b4ed3591996b7ac9e47495397e6
SHA1

65fb4cebbbd4744544db8ed909d897de7e47a441
SHA256

aa4e68f37f862bafd449831a548c5928b7a7ad34e25e22def2d9a02d5b62aec4
SHA512

c9a6fc794425df3ec3d237e65ae534a617b754dffe42bb2c01316e86b51ddf20d37b7f1029883ec4809ffcfd1b2e50266e7922a83460ddb37cda42bb348f2e2a
SSDEEP

768:V6LsoEEeegiZPvEhHSG+gDYQtOOtEvwDpj/MLam5aFr7YOzzfm0EXsJ/:V6QFElP6n+gMQMOtEvwDpjyaYaFAh32

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1

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_40e94b4ed3591996b7ac9e47495397e6_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_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

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

System Information Discovery
T1082

pid	process
764	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe

description	pid	process	target process
PID 4476 wrote to memory of 764	4476	2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe	asih.exe
PID 4476 wrote to memory of 764	4476	2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe	asih.exe
PID 4476 wrote to memory of 764	4476	2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_40e94b4ed3591996b7ac9e47495397e6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4476

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:764

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
46KB

MD5
856c604f2c5633ae8684cb4ce6b376e6

SHA1
74d1d9513ae93943156b49c74c42946c54ef19d1

SHA256
cb26777c2fb4c58609c84b3108e101260af820126fe3362dbbcb4ea2f1f427d6

SHA512
cc8ff7049f1612e0141a33029a290ffb9a25d03464ef92dc990f45d7ffc783d7fe9ecf1fe5db9c4eb24ba3d09597be7cc0430a369e045e8687994af9fac6acff

Download Submit
memory/764-17-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/764-23-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4476-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4476-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4476-8-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download