41c15ecb31738d3611258cd2ac804d9d8f92ab906845f4b409d40771fed6b735

Analysis

max time kernel
150s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/03/2024, 19:42

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General

Target

2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe
Size

120KB
MD5

94f39a8244ba7bd972810d56fd4df188
SHA1

3f92a8f87525501636060d709a14f694208863bf
SHA256

41c15ecb31738d3611258cd2ac804d9d8f92ab906845f4b409d40771fed6b735
SHA512

8ceb03552c4337e4ca14d7efc17642ed419e5389a867510a5c2baf0a9783559125210b4c2e1da466671ed77f26782e71e5a8e1c5530b239525c5482f2bb45374
SSDEEP

1536:u6QFElP6n+gWMOtEvwDpjJGYQbN/PKwMgo:u6a++OtEvwDpj6zs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002331d-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002331d-12.dat	CryptoLocker_set1

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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3856	asih.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 860 wrote to memory of 3856	860	2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe	98
PID 860 wrote to memory of 3856	860	2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe	98
PID 860 wrote to memory of 3856	860	2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-05_94f39a8244ba7bd972810d56fd4df188_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:860
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3856

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=4448 --field-trial-handle=2496,i,15897292497548307209,13920214570023230813,262144 --variations-seed-version /prefetch:8
1⤵
PID:3620

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\asih.exe

Filesize
121KB

MD5
d83a1c9b2d361e0766e5cc81bfc7840c

SHA1
71869fc686e346cdee99bee983249f30c8a9250b

SHA256
2cbddb8fed82f47900812e01aeb3d5d2ee19965494056547a74faec4e09483f3

SHA512
5b389c691602ccca57d5b09f75ca354236122341c8a296de78ac2f943fbc69d7e8ea6bd3dc906f7926079aabbd8ff623a55af686bdd012fb60b3bb7b3558ae59

Download Submit
memory/860-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/860-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/860-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3856-17-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3856-20-0x0000000002150000-0x0000000002156000-memory.dmp

Filesize
24KB

Download