512ea27a32ce3854790d56f9fc17730aa3c83a830fc9708d239963240b54b452

Analysis

max time kernel
150s
max time network
156s
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, 08:35

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General

Target

2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe
Size

36KB
MD5

7ae2069a422d26cb0613613aad836a19
SHA1

21bd0e61f1c12451a700c44e1e6f97baa05cd8a2
SHA256

512ea27a32ce3854790d56f9fc17730aa3c83a830fc9708d239963240b54b452
SHA512

84bb7493d80f56def0a13346e7798911a75f274fe37c5ee4db2779582cd4a31156bd53646866fa9d76decfcfab5f64bef499ccfc617215006f7192b36bd394ec
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8INBjPPA:b/yC4GyNM01GuQMNXw2PSj1Pqq8oBjg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023331-12.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_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2656	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 3352 wrote to memory of 2656	3352	2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe	95
PID 3352 wrote to memory of 2656	3352	2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe	95
PID 3352 wrote to memory of 2656	3352	2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_7ae2069a422d26cb0613613aad836a19_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3352
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2656

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=3252 --field-trial-handle=3408,i,16599691418790971742,134777455365707676,262144 --variations-seed-version /prefetch:8
1⤵
PID:3608

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

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Downloads

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

Filesize
36KB

MD5
f849cf2e37cef869f4201c58be1d6087

SHA1
c31b2504540c4ea4f0f70f5457a99ff8d92652e9

SHA256
ad96881d1bee5ee5fe3189b9494496f353ef4e8550fd4afe43392c748279b1ca

SHA512
fdd71cc7d0c8fac4b2f3a0d227e8a07c5babaf6ded7d097d3c9dcb83c7d3f437d2508091b6f28d8dd00e81bddf0df841ec59c3bcbeadaec311b63095fb49d251

Download Submit
memory/2656-25-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/3352-0-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3352-1-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3352-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download