5fff9aa846e230bddd0e462287e81b2a414676743d39c243583c5550e62c687e

Analysis

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

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 07:34

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General

Target

2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe
Size

34KB
MD5

943d21c8679dcb54eb6ac23d92ac3b73
SHA1

a6fd1352c5f1e42ae853034531e85025e3d7a586
SHA256

5fff9aa846e230bddd0e462287e81b2a414676743d39c243583c5550e62c687e
SHA512

45b3b99427da6ba1d84934d8bc37ee4dfb5cb39ac0d460788bc083459b3b64513766fc13c4fa19d8512a757dc57d74d085840bc0b6ac5bdab471c1c8df484302
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsgqDx8:b/yC4GyNM01GuQMNXw2PSjSKkcJe8

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00050000000232a4-12.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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4512	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 404 wrote to memory of 4512	404	2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe	82
PID 404 wrote to memory of 4512	404	2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe	82
PID 404 wrote to memory of 4512	404	2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_943d21c8679dcb54eb6ac23d92ac3b73_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:404
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4512

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
34KB

MD5
e4ff005fa2c311a26dd47b91334e85ca

SHA1
d9aa32a09c7201cd1cf9355643acb1d7e779df8f

SHA256
114cbc605d245760e8275608b7fea9a1f292ed11fe55d4decf0e69b00b92b5cd

SHA512
63a1c1f876d5b77ad2a320f328adc94cba0580807f421b521a1a06d45e8548efdc292a82d4b0d759c24f518a3acfe06ee07cd626348039f3bd4dddc8f007fd9a

Download Submit
memory/404-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/404-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/404-8-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4512-25-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download