6221b5225966859d0540dc41b128763265547d6bacdc211bf1476c1ca6ca2261

Analysis

max time kernel
150s
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
11/03/2024, 09:29

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General

Target

2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe
Size

124KB
MD5

9db41677754a9eeebb26f69325670e19
SHA1

c893a87e5b7c4775b561071c3ed26e0e1d1a62f3
SHA256

6221b5225966859d0540dc41b128763265547d6bacdc211bf1476c1ca6ca2261
SHA512

9450cde7d6170c6055bd30de875115cc8e2e7718742756f9af52cb86bca20c9090d1bb7e2489dc302580e486d0e9ffefeb1388a4e1d3331e7afcc5d64d70427a
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1e7H:AnBdOOtEvwDpj6zZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db2a-13.dat	CryptoLocker_rule2
behavioral2/memory/4764-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4428-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4428-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000001db2a-13.dat	CryptoLocker_set1
behavioral2/memory/4764-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4428-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4428-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000800000001db2a-13.dat	UPX
behavioral2/memory/4764-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4428-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4428-26-0x0000000000500000-0x000000000050F000-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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4428	asih.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4764-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000800000001db2a-13.dat	upx
behavioral2/memory/4764-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4428-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4428-26-0x0000000000500000-0x000000000050F000-memory.dmp	upx

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 4764 wrote to memory of 4428	4764	2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe	95
PID 4764 wrote to memory of 4428	4764	2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe	95
PID 4764 wrote to memory of 4428	4764	2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_9db41677754a9eeebb26f69325670e19_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4764
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4428

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=1408 --field-trial-handle=2256,i,9172343514068348080,519219714517961765,262144 --variations-seed-version /prefetch:8
1⤵
PID:724

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
124KB

MD5
b1b729e770690d72d1f799d1f3fa0881

SHA1
846130028e80f9502312e9afad49ecf0c200900e

SHA256
9f2844ab3a92fe42c40f0af69ad5a897f25b872a2f7060e4e1af8c4b333e7ef1

SHA512
948369d03dfffaca1d34a0f129c623dc5746e0615b982e3775328a649fcf8f81f53c1e81ea1fce5071db767fa7c9be9c14237a43e0db839c98becdd81467dd68

Download Submit
memory/4428-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4428-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4764-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4764-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4764-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4764-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4764-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download