967eb9f68fd3e1a75f05dba6b84f695dd4c9a0eaa0a81b36f2c2a57cd1afc4d5

Analysis

max time kernel
83s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03-02-2024 05:24

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General

Target

2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe
Size

33KB
MD5

157c6b642b7a4d7e972334f1794ecc3f
SHA1

26931d5cd9af83d13160820170c9af647ba1ce91
SHA256

967eb9f68fd3e1a75f05dba6b84f695dd4c9a0eaa0a81b36f2c2a57cd1afc4d5
SHA512

26129975b63c39205c5c1705fa3f87d29cf979b061578a928f16d2795028ce7c86dbeb6cbb6ce606be5dd5b4046ea859d48e2195b6f3948ec80d88cde466ca9e
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAk:b/yC4GyNM01GuQMNXw2PSjHC02ltAk

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002320d-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4824	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 1600 wrote to memory of 4824	1600	2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe	85
PID 1600 wrote to memory of 4824	1600	2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe	85
PID 1600 wrote to memory of 4824	1600	2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_157c6b642b7a4d7e972334f1794ecc3f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1600
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4824

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
33KB

MD5
7b266fddbf3757441ca57ccfee5299fd

SHA1
8f86dda7fa3479a153c1595504268ddfb3d8db75

SHA256
d3dfb5fd859216cd607c114fa74727e59d28d6f557c138ed91428eab1f33f3b2

SHA512
1fbec064777e61d4bbe6ed896ea77950de445e64924dd8f02e7c68c5a5dfefe4c393a44f77de9862790b44f93f68b34770d1c24452c9bb4bb64ea8576809485f

Download Submit
memory/1600-0-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/1600-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/1600-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4824-20-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download