f3affa4af6e0b5f8b1754f50efaa4dc47ed620d3aae783c9897327018f2bc12c

Analysis

max time kernel
142s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/05/2024, 00:25

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General

Target

2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe
Size

59KB
MD5

46e1e94b511a86e34cc5ada618061363
SHA1

a17a2b989eb7b63b04c991355c62247275d12a12
SHA256

f3affa4af6e0b5f8b1754f50efaa4dc47ed620d3aae783c9897327018f2bc12c
SHA512

ace453844ddc8b9b14e6440cbfc25f6b8e72fe042e4bbcd297591237b247b5a33b18a4b144cc9a1f9bdcf921fa0ee470ba0318a4a7e33e44ddb601e78c230a96
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pJ:H6QFElP6n+gou9cvMOtEvwDpjCpVXH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1140-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002323f-13.dat	CryptoLocker_rule2
behavioral2/memory/1140-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4008-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1140-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002323f-13.dat	CryptoLocker_set1
behavioral2/memory/1140-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4008-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1140-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002323f-13.dat	UPX
behavioral2/memory/1140-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4008-25-0x0000000000500000-0x0000000000510000-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	2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4008	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1140-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002323f-13.dat	upx
behavioral2/memory/1140-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4008-25-0x0000000000500000-0x0000000000510000-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 1140 wrote to memory of 4008	1140	2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe	91
PID 1140 wrote to memory of 4008	1140	2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe	91
PID 1140 wrote to memory of 4008	1140	2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-14_46e1e94b511a86e34cc5ada618061363_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4008

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=4064 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
1⤵
PID:3856

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
59KB

MD5
5102d428898da7b1adf6122be1cd37e3

SHA1
8e0e5603d292a5a4aeb2162cf6ace5fea7e2282a

SHA256
b3011805b8cca682abfe10febfb572b199170666950f89a58561fb70fdd36a36

SHA512
22e1ef6ed1ebd4cfcd0e2f17515f2579158a3103b86979268c4008c1ed75a57f97779db0c80259b5ce9498a8bf42b9f6b899a87d68cba7e99b5445cae4f9f515

Download Submit
memory/1140-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1140-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1140-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1140-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1140-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4008-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download