af974a9fdf3b2dbedb1e69feb9c671a11d686e68ea4ab474cda91392a512fbf6

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14-03-2024 07:40

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe
Size

42KB
MD5

6a3f9f65186107c01d82e78ffddcffd6
SHA1

16321875d8b572eb2147f375d20ed4475b27c9ca
SHA256

af974a9fdf3b2dbedb1e69feb9c671a11d686e68ea4ab474cda91392a512fbf6
SHA512

8cb26c07b0b11d36f74dd0199b86ddd0814458e0b646fda257152881b6c227cb8d390b89250d292076df4dffd792937bea9508262f5434d49c06a2b9d7d6f871
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9Dx:b/pYayGig5HjS3NPA9Dx

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001db2a-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2624	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 3324 wrote to memory of 2624	3324	2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe	95
PID 3324 wrote to memory of 2624	3324	2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe	95
PID 3324 wrote to memory of 2624	3324	2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-14_6a3f9f65186107c01d82e78ffddcffd6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3324
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2624

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3240 --field-trial-handle=2588,i,4353937220825226770,7138584070663735671,262144 --variations-seed-version /prefetch:8
1⤵
PID:3880

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
42KB

MD5
7c52a4b087d5d281887e71f466911190

SHA1
5a0d1966cf5d419a90ca6ef8585c1291e9423d90

SHA256
3a36c02826a53ac96e08bd76ae2ac278f8db51f4e09ccb2193e92f6dae2a10ba

SHA512
04a9ecc625c43b15ed487ab54472554f2b24a2d8b0d6b1fab7c65c138206b847fe4e3f4987f6071d57d52b06d3510d330b3b18544fe01736219f78947f9ff90d

Download Submit
memory/2624-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3324-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3324-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3324-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download