d527959052d10b5b0b1d3424c023daaa14a714d3959e7286de0c83c8a705ffd9

Analysis

max time kernel
139s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 11:52

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General

Target

2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
Size

44KB
MD5

636da7fc96f802082b1abc05c67ebb2e
SHA1

576c3f4e17788230781d3cb1e4517f32fb1fec5b
SHA256

d527959052d10b5b0b1d3424c023daaa14a714d3959e7286de0c83c8a705ffd9
SHA512

69f59199ff94a990b7adcdb5fe17ffd6ea04919db12fd4ff013e4b0b2e8d18dfc8f7cfc3b9948c8b43a93c13add707cff421e8d9d93b6db010de003033353e0c
SSDEEP

768:Kf1K2exg2kBwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZsBGGpebVIYLHA3Kx5:o1KhxqwtdgI2MyzNORQtOflIwoHNV2Xw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00030000000227e7-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
368	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 932 wrote to memory of 368	932	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	96
PID 932 wrote to memory of 368	932	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	96
PID 932 wrote to memory of 368	932	2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_636da7fc96f802082b1abc05c67ebb2e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:932
- 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:368

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=3820 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:400

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
8bb470b348af257a1bc208e90795c454

SHA1
85c962d3e09df9a47c5db17378c4b4fdd32ce26d

SHA256
04a56d69488642c8b880628baa222bbfa82171d519bc06c3fdf153e3c6fb6ac3

SHA512
c21d737e225390c2a51243f3702da1a70f8e29a243eb8bdafaa4573e074d56af4f50f2164745d40bd80b4f8a67d62dc6583b36be73ea74137f2d3b639bc96556

Download Submit
memory/368-21-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/932-0-0x0000000000580000-0x0000000000586000-memory.dmp

Filesize
24KB

Download
memory/932-1-0x0000000000580000-0x0000000000586000-memory.dmp

Filesize
24KB

Download
memory/932-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download