edf712d5f4628276de243950cf7a2955c4108c01a6006d6ef451ba491a5553d7

Analysis

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

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/04/2024, 07:48

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General

Target

2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe
Size

32KB
MD5

faac95eb5c193afa7f1a6f4d33a4a818
SHA1

2f1bd5dbfa2c07f47a789abd2ed74b1beb5716d1
SHA256

edf712d5f4628276de243950cf7a2955c4108c01a6006d6ef451ba491a5553d7
SHA512

74873e56df03a669f9aeb2ba275fcde777dee7029fbcc7bb26bbf5e1fb55aa0555e95dc0dbb35d7b00cf17ded5131b76927668ecde50031d0bc419d8c923a971
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcsi:b/yC4GyNM01GuQMNXw2PSjSKkc9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023261-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4896	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 3868 wrote to memory of 4896	3868	2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe	89
PID 3868 wrote to memory of 4896	3868	2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe	89
PID 3868 wrote to memory of 4896	3868	2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-19_faac95eb5c193afa7f1a6f4d33a4a818_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3868
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4896

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=3804 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2964

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
32KB

MD5
cb63340cf52e8ed7ff466c49d45cd030

SHA1
57173cc6da23f249b771f5096d084952ed50d28f

SHA256
f8f8b4ba5ae7bbd73a9e11b347705c5df720f2050ad17c344eb1d89f4f3aaff0

SHA512
5815ef18fc59748818cdb5889b41c46377c4acfa809d3ae24149ae2fb10463e7c67d37cf3f8413e869a1f5a263ed14815fff0582c59657d26d31c07bed9f5fdf

Download Submit
memory/3868-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3868-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3868-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4896-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download