f10851e0b26595cd01c0538fa9af707fe73934fd4aab37d509ff22f19f458785

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2024, 16:31

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General

Target

2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe
Size

38KB
MD5

04aac6bedc8f4c9425cc9dbae2a8b1e5
SHA1

ded2be895248cf5ce584e88f2cb16b1213e7664b
SHA256

f10851e0b26595cd01c0538fa9af707fe73934fd4aab37d509ff22f19f458785
SHA512

3d0b1007b88f26ac3140de4083974d4b72ad16de8e38759ab00405210ce838f7034ce03b73f52066d95254c1bbf7ed288eb5f96f257be4cacce19b5899ed74b5
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxuThua:b/yC4GyNM01GuQMNXw2PSjHPbSuYlEL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000022480-12.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4704	retln.exe

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 1992 wrote to memory of 4704	1992	2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe	88
PID 1992 wrote to memory of 4704	1992	2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe	88
PID 1992 wrote to memory of 4704	1992	2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-22_04aac6bedc8f4c9425cc9dbae2a8b1e5_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4704

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
38KB

MD5
fdc21daf5d362aef05a686dd8d6d5823

SHA1
fc4430f7f451b3aef53fc94c230ac29b462f3404

SHA256
940e119b539d897e54e85d97551324d29a05b9499a6ef2fb204407d9626d5135

SHA512
40c7c186aebd5540027b7f46f219df23322633cfa14a05a8e2bb7ef24905d16ea9998f1fd667bfd4f21c076e91b05154898070c5c949f439a1b01bc94e43bb8a

Download Submit
memory/1992-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/1992-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/1992-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4704-20-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download