f01407f68512170c6ee2ad142c7712611896b9e920bc96263450e727ed7101c2

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
27-03-2024 04:33

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General

Target

2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe
Size

35KB
MD5

c251aa69577c42bf567ec4578f7054d4
SHA1

a22dfe5fde528e1b2c7d261b8608c6e9da4785c5
SHA256

f01407f68512170c6ee2ad142c7712611896b9e920bc96263450e727ed7101c2
SHA512

684be14732dda84471595d1088ede50d1894b5e0d7e300db9ee9b8eeb7bc8aaef40ccab50e30394e2456bc460e3ea3ce36e6fe3db3b2897671d020140ead630c
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzu02lOQAUAMHI:b/yC4GyNM01GuQMNXw2PSjHC02ltAUAB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000001db72-12.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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
752	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 2620 wrote to memory of 752	2620	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	94
PID 2620 wrote to memory of 752	2620	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	94
PID 2620 wrote to memory of 752	2620	2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_c251aa69577c42bf567ec4578f7054d4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2620
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:752

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=4480 --field-trial-handle=2292,i,2927097380497635931,2014459809064723663,262144 --variations-seed-version /prefetch:8
1⤵
PID:3708

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
35KB

MD5
6e9b95b8963841dadb46634574922db7

SHA1
9908c59b731a52f610f88e264762bcc834fca060

SHA256
1afedff3351f45db99da77e54e894b47a1046951a70db17bbc1224a7fad07177

SHA512
7b9f8c76c7fc929267fb4964b6e6267f9914e32a1199a9334f53dfaf9c7b6f5bfe5b9cffd5a090b30cf01f9d54ceded66228a6df760a4dd90965a04800680931

Download Submit
memory/2620-0-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/2620-1-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/2620-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download