7f761cb5e69382c437f75d5b7346d10432b57467539c1d1e8e0ef4076731da73

Analysis

max time kernel
141s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 02:53

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General

Target

2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe
Size

45KB
MD5

e947769d03aa05917dc89322743472a0
SHA1

441e6e6b745a477aedcb2bbc52bc2b3ce93b4532
SHA256

7f761cb5e69382c437f75d5b7346d10432b57467539c1d1e8e0ef4076731da73
SHA512

9f5c79159d6f6d45cec1a4f8e3fd079261accd405a433a57caafb355931fa45ec932483ebf85721967b7467aaf7146e58ec9ee0c9018031ad9e9556467a31ab0
SSDEEP

768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3KxO:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XD

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023607-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023607-12.dat	CryptoLocker_set1

Checks computer location settings 2 TTPs 2 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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	hurok.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4484	hurok.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 4344 wrote to memory of 4484	4344	2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe	90
PID 4344 wrote to memory of 4484	4344	2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe	90
PID 4344 wrote to memory of 4484	4344	2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e947769d03aa05917dc89322743472a0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4344
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:4484

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 --field-trial-handle=3940,i,15142778360084620907,1763097090506261076,262144 --variations-seed-version --mojo-platform-channel-handle=4456 /prefetch:8
1⤵
PID:3176

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\hurok.exe

Filesize
45KB

MD5
4e14221b11426725d173ada9dfdf3bd1

SHA1
fbd5d1479737ce4db7c89fbf44bff4faadba727d

SHA256
407a06105a139b0c70bceef036dee3630a0f9dc19a3fa1ab5920224e062e5443

SHA512
0c74f89a25be0c135b3d81fce3e52b4ef9304ee495acbe8dff692a52df62d28c17ad1e502fd01b5514b660bb2182d6f03a2ea5e67b1c6fb0c2f57a291845af66

Download Submit
memory/4344-0-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/4344-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4344-8-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/4484-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download