24c3097fb4cd54d3f755cd7cbab17fa4f703a174e7ea9d69e73d65f1266dd33e

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 20:09

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General

Target

2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe
Size

44KB
MD5

fb74cdfc3e195336cdbab157598aaa39
SHA1

8f1bb9c379ecb6878dbaf26408c8475fe65e1cef
SHA256

24c3097fb4cd54d3f755cd7cbab17fa4f703a174e7ea9d69e73d65f1266dd33e
SHA512

18d534c06657fe184e768518dac298c0df8f42536ae4b126a9b85c3721988955e61aedb285d6e184e9bb0d935455f09ca1d4d05620cc578ee55c0b537c21e482
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2MoU:qmbhXDmjr5MOtEvwDpj5cDtKkQZQW

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3280-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/3280-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1376-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3280-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1376-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3280-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/3280-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1376-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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	2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1376	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 3280 wrote to memory of 1376	3280	2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe	98
PID 3280 wrote to memory of 1376	3280	2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe	98
PID 3280 wrote to memory of 1376	3280	2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe	98

C:\Users\Admin\AppData\Local\Temp\2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_fb74cdfc3e195336cdbab157598aaa39_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3280
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1376

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=4440 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:4748

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
45KB

MD5
948e7c6967d361bcf2c03e4ec7133656

SHA1
f3d028153b29afd148c60fbd29114e26db1509eb

SHA256
c64c8597054026b5686007fe800fc878d9701ee8fc732cf66d99d2c57dd1b5ac

SHA512
76cdff3cd5be06f216eb377b434ae084114b1224a79e0509899ce85a4b5082a264d3430dd3a06950fa66bc3d281b82e3b9450591b563938bece2955426068414

Download Submit
memory/1376-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1376-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1376-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3280-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3280-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3280-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3280-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3280-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download