613e0e7335f697c0b7c910e1fdc4cd436104c2bfa5d7d75fa225e0cc5758bf3e

Analysis

max time kernel
151s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-04-2024 07:29

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General

Target

2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe
Size

32KB
MD5

34ef8733b236b06e8de4b2ff8c08d7ca
SHA1

59146cb3de71158f80366e523bc12e2e7ea5396d
SHA256

613e0e7335f697c0b7c910e1fdc4cd436104c2bfa5d7d75fa225e0cc5758bf3e
SHA512

87cc5d98c33a595e042a446c70ea92be482730b86f642f796168c83844b9c0af45e2aff2fae82f3a83cf2c4ce6e8ded3928d2c1f2b790adbdf908a981075babd
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznStEkcs8v:b/yC4GyNM01GuQMNXw2PSjSKkc9v

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023247-12.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	2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2448	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 556 wrote to memory of 2448	556	2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe	90
PID 556 wrote to memory of 2448	556	2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe	90
PID 556 wrote to memory of 2448	556	2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_34ef8733b236b06e8de4b2ff8c08d7ca_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:556
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2448

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:984

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
5bce7348225570bc54d840d9c89253a4

SHA1
86fec397c7133aa776a56d71830432b1a8dca5bf

SHA256
fa3b79d660840e32d17570a834044da71242fb63b787cc434b0e8b3dab98d71e

SHA512
9a8503a7c602eac596331062189f2f41c9b73bfbc1335e6ab76467a2c5e143c4df22107084fe709d3ccafd50634fd68b29a24d57fe54facf89095b8f2e34820d

Download Submit
memory/556-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/556-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/556-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2448-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download