bfe9b1f5dedfdad7f13157d8aae85475bba1853fe5f9b271ceef76674bb867c2

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
13/06/2024, 03:38

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General

Target

2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe
Size

66KB
MD5

74bffae59c74f349bcaf1b22dafadea4
SHA1

1444b95ddcde75468ed2b92a0f0c49cd142a62c5
SHA256

bfe9b1f5dedfdad7f13157d8aae85475bba1853fe5f9b271ceef76674bb867c2
SHA512

8e70fc78c4d2f997b0232cfe86cbea4d44741558502090834ed312eb415564dcf034e08a104f9dd14327888a1e5ae3a9ff251456d5ce42fb7c9f7d869ae593c8
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6UAXtN:1nK6a+qdOOtEvwDpjP

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3064-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000235e8-13.dat	CryptoLocker_rule2
behavioral2/memory/3452-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3064-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3452-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3064-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000235e8-13.dat	CryptoLocker_set1
behavioral2/memory/3452-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3064-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3452-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3064-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00080000000235e8-13.dat	UPX
behavioral2/memory/3452-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3064-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3452-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3452	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3064-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00080000000235e8-13.dat	upx
behavioral2/memory/3452-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3064-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3452-27-0x0000000000500000-0x000000000050F311-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 3064 wrote to memory of 3452	3064	2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe	89
PID 3064 wrote to memory of 3452	3064	2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe	89
PID 3064 wrote to memory of 3452	3064	2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_74bffae59c74f349bcaf1b22dafadea4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3452

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 --field-trial-handle=4040,i,7977653611488681184,6839495125838449898,262144 --variations-seed-version --mojo-platform-channel-handle=3024 /prefetch:8
1⤵
PID:4012

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
66KB

MD5
8564c7876c0d485486dee24f2fdf025c

SHA1
1a1e8c1c168ba7dda3107c4c26f7506d39440224

SHA256
f8c944f2a49dd3a4a457d33023043a259d570511cc70fb85ddafdc760ad81486

SHA512
3fe15a017b2e178b9a0ef817f534e48d0cf3a340bd2a0075e87a284d6e707f1130cec1d14fe62cbb86cc906e588bfdec44666d5ccdcf503109a8cc266c3ec4b6

Download Submit
memory/3064-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3064-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3064-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3064-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3064-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3452-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3452-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3452-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3452-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download