1aa6e7f861528566a327894c4064b0496c81d95732ff32f1a4c3f4cdb500b8c1

Analysis

max time kernel
143s
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
04/06/2024, 17:15

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General

Target

2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe
Size

64KB
MD5

640dd37b13f0e29285f66269a26733c8
SHA1

5f92b3fa76b86a2cda047701c48d730f475599a1
SHA256

1aa6e7f861528566a327894c4064b0496c81d95732ff32f1a4c3f4cdb500b8c1
SHA512

331070cddc844bc428fdaf9bb2aec2f6a7c59e72a0651675d24e294bb34839137ee63ec5be4f95b7fc1200d6ff201dd32b3ebd3c1efb9948c5f1f090624f6a28
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYMWRt:1nK6a+qdOOtEvwDpj4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000022f7b-13.dat	CryptoLocker_rule2
behavioral2/memory/4840-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4804-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000022f7b-13.dat	CryptoLocker_set1
behavioral2/memory/4840-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4804-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000022f7b-13.dat	UPX
behavioral2/memory/4840-25-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4804-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4804	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4840-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000022f7b-13.dat	upx
behavioral2/memory/4840-25-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4804-26-0x0000000000500000-0x000000000050F311-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 4840 wrote to memory of 4804	4840	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	90
PID 4840 wrote to memory of 4804	4840	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	90
PID 4840 wrote to memory of 4804	4840	2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_640dd37b13f0e29285f66269a26733c8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4840
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4804

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=4192 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:1508

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
64KB

MD5
fc5eb9049479b9fe408b51aeee0eca72

SHA1
35480fbdc9a68b4b5791585318b0465ad9a7c317

SHA256
7e6d792b29748f0b918a132559f65bc9ccbc5ab2fdde7dea186d5f1518769803

SHA512
f46c80746d7327ebf462cc0d60f513cf85bc4d00ad061cc142d5610e41bf7199005f2d138d93b84c2d5991b9020a8500620b59a098d752575ed4048b61a73883

Download Submit
memory/4804-24-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4804-18-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4804-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4840-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4840-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4840-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4840-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4840-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download