da1b82b9e3da72939408ea63735604bd94cd3697cf46e388bd5c66540fef9dbc

Analysis

max time kernel
154s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
30-04-2024 01:02

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General

Target

2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe
Size

38KB
MD5

d6ead3eb324ef8040b1859dff0f14d7d
SHA1

b1982499d2bc8788436df6306e5c3f4a9585d61e
SHA256

da1b82b9e3da72939408ea63735604bd94cd3697cf46e388bd5c66540fef9dbc
SHA512

ae271ed0be64a357dd4265939b607cddbb7c9ac9678fd61eaf3747d81db740ebfd0804fae1c05577e69546a4a20c7fa441ec24d9554d1e6ebda2e15728a33cae
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8IujdxNnA:b/yC4GyNM01GuQMNXw2PSj1Pqq8Bu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023248-13.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2576	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 1836 wrote to memory of 2576	1836	2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe	90
PID 1836 wrote to memory of 2576	1836	2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe	90
PID 1836 wrote to memory of 2576	1836	2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_d6ead3eb324ef8040b1859dff0f14d7d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1836
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2576

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=2268 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:4536

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
38KB

MD5
8bf75edd44f60364a6de78a51f27fa44

SHA1
5226c2ce171f97221572e66fa386a6a4cb34a6cc

SHA256
40354dbadb1fc02b67b8bbdb343b4410d111a6b26bc74742441cea9b060e28da

SHA512
da8e6684b8bd781df0daf0ab6ab1440ba11a60d9c1de041dcefe0168b5494ea1ee8d206c6070b74f239b889749a638fb09a7a4a6d1246358fd593429056b2723

Download Submit
memory/1836-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1836-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/1836-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2576-24-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download