6756b309acd7e204ddabb0a499cd823761742907061f209f95ce2b2f342cfc20

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
12/05/2024, 03:45

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General

Target

2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe
Size

37KB
MD5

3abf9d5255f6ecc30b132291e1aa1483
SHA1

c3b5c6b19b7048b177f8f7b54713bd5ab23cd2e5
SHA256

6756b309acd7e204ddabb0a499cd823761742907061f209f95ce2b2f342cfc20
SHA512

f4640eece2b5b9949e1762e3ab6cc3aa91c57dc3373c90bd90e6d49b29c96c98afba908021a16e00c074986068bee80dd76068569fa9175124674710e5b71118
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxuaP2:b/yC4GyNM01GuQMNXw2PSjH+PPxV2

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023305-12.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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4620	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 2356 wrote to memory of 4620	2356	2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe	83
PID 2356 wrote to memory of 4620	2356	2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe	83
PID 2356 wrote to memory of 4620	2356	2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-12_3abf9d5255f6ecc30b132291e1aa1483_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4620

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
37KB

MD5
8927384a07b4a116894ea4cd6b70b59c

SHA1
9469531bfd59bf6816a67cc83619f593fc056582

SHA256
c5e485f2169203739675d53cfb549a54afdec39bddf6532b8a5d99114f493276

SHA512
24c9d4f611eb72de41d7a2b85c8e5a1801517201231f9007898b6b1871e210c5cdf3e32156ff35b80b7b2af334af2212812ebe3ca8dc45db3b78aff62f64293d

Download Submit
memory/2356-0-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2356-1-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/2356-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4620-25-0x0000000000700000-0x0000000000706000-memory.dmp

Filesize
24KB

Download