95a117fb31c8bfef895108444f6f2edd7a1431cd30805b2946d653c851be9391

Analysis

max time kernel
148s
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
25-04-2024 17:30

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General

Target

2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe
Size

62KB
MD5

7012431beb1639564fc38e397d58c8bf
SHA1

fe04c3d8d80026a9d5783c079acd7ab063f37475
SHA256

95a117fb31c8bfef895108444f6f2edd7a1431cd30805b2946d653c851be9391
SHA512

53e13340f51cf1792169469ab7e243d4b627b5bbcd7a426bef64c422a2198cb2959a3142cf32adad4ece61b3e347c90d849925e7e5418500052c74829fa3a1e9
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiJ:BbdDmjr+OtEvwDpjM8Q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b00000002321b-13.dat	CryptoLocker_rule2
behavioral2/memory/1384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/1384-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4024-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b00000002321b-13.dat	UPX
behavioral2/memory/1384-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4024-26-0x0000000000500000-0x0000000000510000-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	2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4024	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 1384 wrote to memory of 4024	1384	2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe	90
PID 1384 wrote to memory of 4024	1384	2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe	90
PID 1384 wrote to memory of 4024	1384	2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-25_7012431beb1639564fc38e397d58c8bf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1384
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4024

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=1416 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:3552

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
62KB

MD5
7b3a6a33b3dfac0cb86be8b385d4a07b

SHA1
0d7a9f3a01c8c0a1dcd5dce14e05ac22180c24a4

SHA256
4a4834354733d3b9e150d0bdaf477fc6592f06906c0b72b69153a3b9b8ad4f57

SHA512
6f550bab2f614a1f50d9c30b6c80d632446d0bad3e1f47c18255ae3faf30f07e6eef4110884ef84ebf1db110630b675286f17707bf88827132c467f745303fb8

Download Submit
memory/1384-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1384-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1384-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1384-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1384-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4024-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4024-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4024-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download