b84619e3cd3e786b49a5a90cc61e06153ea52ff3fef4dfcbddcd7dd7e5b024fb

Analysis

max time kernel
153s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
13-03-2024 04:26

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General

Target

2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe
Size

118KB
MD5

0e40e6d3908c32cfe329822ebd7d3e32
SHA1

db4b5172d6b96e79322504316d10da3313508276
SHA256

b84619e3cd3e786b49a5a90cc61e06153ea52ff3fef4dfcbddcd7dd7e5b024fb
SHA512

1f649d37ea59f807f3545d2208947d0e0e1841db5d3653761aa284741df64cdcf5415297c5483bc62fd762bfaf6cf8c8bb4cbf37d9521ff8843f315a58f9a446
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp01ZNY:z6a+CdOOtEvwDpjcz6

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_rule2
behavioral2/memory/3160-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3124-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00030000000227e7-13.dat	CryptoLocker_set1
behavioral2/memory/3160-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3124-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00030000000227e7-13.dat	UPX
behavioral2/memory/3160-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3124-26-0x0000000000500000-0x0000000000510000-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	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3124	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00030000000227e7-13.dat	upx
behavioral2/memory/3160-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3124-26-0x0000000000500000-0x0000000000510000-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 3160 wrote to memory of 3124	3160	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	101
PID 3160 wrote to memory of 3124	3160	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	101
PID 3160 wrote to memory of 3124	3160	2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe	101

C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-13_0e40e6d3908c32cfe329822ebd7d3e32_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3124

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=2268 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:3480

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
118KB

MD5
8e741630db440b1c30f2f726acab29f4

SHA1
7cff77bd03fe4b7f56788f8237a92881bcf95936

SHA256
27157bb2921595f1ccfd32adf74c38bb92a479a5f0764758900e9eaee013d362

SHA512
5d2e7b7a248396b34fcff88b85c42a7d78054a0c4d5c2663bbd7a42463efba125f25cba6a19e899b882f7a52945caf844263e3fb89123f217ac068107807b999

Download Submit
memory/3124-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3124-18-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3124-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3160-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3160-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3160-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3160-3-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/3160-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download