deb383b85841d693970bdb57a8f3512958526727cab3c5ff6a413f3fa1415721

Analysis

max time kernel
150s
max time network
147s
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 02:26

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General

Target

2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe
Size

44KB
MD5

22649df334759e7a643e262d096ddb8c
SHA1

9fc93bd59703c48b75229386e7bc17d7576af28f
SHA256

deb383b85841d693970bdb57a8f3512958526727cab3c5ff6a413f3fa1415721
SHA512

2512e8d5c00b00bd87aed74faa3da28540992a37259940d9894bb387e95e359e494bce53b9863bc2d73cfafd3e28b1d114170c2604376d37db980710cb9b2ded
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA4DwOoJR:b/pYayGig5HjS3NPAuwf/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

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

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_22649df334759e7a643e262d096ddb8c_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_22649df334759e7a643e262d096ddb8c_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

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

System Information Discovery
T1082

pid	process
368	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe

description	pid	process	target process
PID 1448 wrote to memory of 368	1448	2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe	retln.exe
PID 1448 wrote to memory of 368	1448	2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe	retln.exe
PID 1448 wrote to memory of 368	1448	2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_22649df334759e7a643e262d096ddb8c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1448

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:368

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\retln.exe

Filesize
44KB

MD5
4a6b1dd3e97767a1f58cf78138fa7c71

SHA1
4f09c9d1e58386e4b564811359ed3665d754b16f

SHA256
b38894a95457d00a662165ec556330caa461ce24a6dfbeb2733655da14bbaffc

SHA512
4c127cad5d1fc92e652cdd101e7ddf376c2126af60c7d532bca447726534e59bbb12b1198ce37e2ce7d84032705699f52cc79228581d9e9166fb0a09da3c4736

Download Submit
memory/368-25-0x0000000000530000-0x0000000000536000-memory.dmp

Filesize
24KB

Download
memory/1448-0-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/1448-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1448-8-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download