4e3b3682b4a48613e678d85d07ddac8f3dec66a89b523d65a72469daedcc5326

Analysis

max time kernel
142s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 19:54

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General

Target

2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe
Size

48KB
MD5

6f39163bfa0b1f7c43989a6d323382b2
SHA1

271af58bf6035411e489947f3fd504f416e5e9fb
SHA256

4e3b3682b4a48613e678d85d07ddac8f3dec66a89b523d65a72469daedcc5326
SHA512

238a1cb17ae80a4a7fb1aa6dab38f1977a7d471f1b049c7593397d819779fe6e3dbfad9f134a4acc575805654ba554a2ff00057013c93889e4278c85ade0ed14
SSDEEP

768:P6LsoVEeegiZPvEhHSP+gp/QtOOtEvwDpjBBMLZdzuqpXsiE8Wq/Dpkclg:P6Q0ElP6G+gJQMOtEvwDpjB8WMlflg

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/412-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002323d-13.dat	CryptoLocker_rule2
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/412-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4576-27-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/412-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002323d-13.dat	CryptoLocker_set1
behavioral2/memory/4576-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/412-26-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4576-27-0x0000000000500000-0x000000000050B000-memory.dmp	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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4576	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 412 wrote to memory of 4576	412	2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe	90
PID 412 wrote to memory of 4576	412	2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe	90
PID 412 wrote to memory of 4576	412	2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_6f39163bfa0b1f7c43989a6d323382b2_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:412
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4576

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=3480 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:1860

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
49KB

MD5
047bb6dedbd10407d59bc04620fc238e

SHA1
be18a719fb6fcf2cc18e4e7caeee1a92b51dc7a1

SHA256
3067159dd6580a26b9be76a4d1d4216998d10379d6a06399ff11dfeb7f22ea1d

SHA512
1674ad8e7358176f584ff175936b2e77ab7e5b2951d16351aa573ecb2e22500a533a1763200ee073e1ec592a32ed79634398cb92ee1f5e6e5fae70ae51b11a67

Download Submit
memory/412-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/412-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/412-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/412-3-0x0000000000710000-0x0000000000716000-memory.dmp

Filesize
24KB

Download
memory/412-26-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4576-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4576-25-0x0000000000570000-0x0000000000576000-memory.dmp

Filesize
24KB

Download
memory/4576-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4576-27-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download