636e2a6da35fdd649c1881da33168fc5360c3b423fbf4b881461203ca5c3ebb7

Analysis

max time kernel
142s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
22/04/2024, 19:37

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General

Target

2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe
Size

146KB
MD5

9f6bec46e7644a2560c7024a5c8c8f8d
SHA1

8bc8fed970b8a40e1d9de42ec582cbe2e4c916bc
SHA256

636e2a6da35fdd649c1881da33168fc5360c3b423fbf4b881461203ca5c3ebb7
SHA512

8634fdb304b1c222d744ce89262d6bfc7c5b8b3b968568676bed2d50aab9c336ed8876a7cd82156f7b854aecf294eb13478d78e6185e415210e4ebce803229af
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjCGYQbN/PKwNgp699GNtL1ed:T6a+rdOOtEvwDpjLzX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002325a-13.dat	CryptoLocker_rule2
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002325a-13.dat	CryptoLocker_set1
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002325a-13.dat	UPX
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-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	2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4244	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002325a-13.dat	upx
behavioral2/memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4244-26-0x0000000000500000-0x0000000000510000-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 2916 wrote to memory of 4244	2916	2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe	90
PID 2916 wrote to memory of 4244	2916	2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe	90
PID 2916 wrote to memory of 4244	2916	2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_9f6bec46e7644a2560c7024a5c8c8f8d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4244

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=1328 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:4056

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
147KB

MD5
5d12436bd9b280719007989a12848c3b

SHA1
97c4eadfffd22fdf1c6506f85e1c8bae584d1cb2

SHA256
3230b5d01c82e24d06b29450e1ca1ebc91753acf9f5bf4abe2c0a07cd93c5396

SHA512
5efa2b479fb4c96c59799946160bc493d2486d87024b14068feac6804bf4702208362978e36bd3044c00044c309efa3ed8b7a0923f432b930cfb277e2bd3a1c9

Download Submit
memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2916-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2916-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2916-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/2916-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4244-20-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4244-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4244-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download