5dedd02bd6cec826f707132d8f939ff6dd896e23a74095f2a95daf4ccf4cbea6

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19/05/2024, 23:23

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General

Target

2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe
Size

39KB
MD5

b3f61c2f91c2f08e10b971e74bf13319
SHA1

703a18d7f6234f1ff95f34926dede0805d8a196c
SHA256

5dedd02bd6cec826f707132d8f939ff6dd896e23a74095f2a95daf4ccf4cbea6
SHA512

b7417dec59a27bb771da57efaf7f8bd74d4025b2b4958d5d5b2ea25fc87b61c2d5b329bf8eb70e361ed6337d83ddcc7d4c926a486365ff3458f75e1776d20eb3
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9T:qDdFJy3QMOtEvwDpjjWMl7TU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023532-13.dat	CryptoLocker_rule2
behavioral2/memory/464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/768-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/464-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/768-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023532-13.dat	CryptoLocker_set1
behavioral2/memory/464-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/768-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/464-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/768-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0009000000023532-13.dat	UPX
behavioral2/memory/464-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/768-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/464-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
464	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/768-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0009000000023532-13.dat	upx
behavioral2/memory/464-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/768-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/464-28-0x0000000000500000-0x0000000000510000-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 768 wrote to memory of 464	768	2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe	91
PID 768 wrote to memory of 464	768	2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe	91
PID 768 wrote to memory of 464	768	2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-19_b3f61c2f91c2f08e10b971e74bf13319_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:768
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:464

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 --field-trial-handle=4076,i,1809100026287847100,9768898026582633513,262144 --variations-seed-version --mojo-platform-channel-handle=3808 /prefetch:8
1⤵
PID:1172

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
39KB

MD5
4a7835d328cf396ee9ac9f4c70dff3a8

SHA1
afbe4438ee51ed6bbc34b75f57bf7219891989bd

SHA256
1842942884cca6af4f726db4d2a735bb380018662f95817b8bb7e29f7af7c53a

SHA512
7832900f772f5ba6cb1f767ceb12f3bd345e44d526b71ba34e42e3184b15f22e5f300f02b1694e09b438d2ed836629cd6ba468c02d2eea43642842f28c2cab37

Download Submit
memory/464-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/464-21-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/464-27-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/464-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/768-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/768-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/768-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/768-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/768-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download