891f9fec1579674020e78a97f1adc5047a50c3da2534157cc1a8ce2cc81e1d97

Analysis

max time kernel
157s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 00:17

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General

Target

2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe
Size

37KB
MD5

cc3f64628b9908c93cdc65c9162bf3ed
SHA1

bb40e508472ab08869c6f4d7dd8d087603cb52f5
SHA256

891f9fec1579674020e78a97f1adc5047a50c3da2534157cc1a8ce2cc81e1d97
SHA512

b7367f42f54a716f5cb73b4aabf6cf0d05f868dc5d506b125ac47397456b88e9038bf48f5cbda058114c46645e55835a8912667d4cf48023b9dd7e38685fdb60
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK3p:qUmnpomddpMOtEvwDpjjaYaQp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1108-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1108-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023263-14.dat	CryptoLocker_rule2
behavioral2/memory/1108-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5092-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/1108-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1108-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023263-14.dat	CryptoLocker_set1
behavioral2/memory/1108-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5092-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1108-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1108-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0008000000023263-14.dat	UPX
behavioral2/memory/1108-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5092-28-0x0000000000500000-0x000000000050F000-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	2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5092	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1108-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1108-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0008000000023263-14.dat	upx
behavioral2/memory/1108-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5092-28-0x0000000000500000-0x000000000050F000-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 1108 wrote to memory of 5092	1108	2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe	91
PID 1108 wrote to memory of 5092	1108	2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe	91
PID 1108 wrote to memory of 5092	1108	2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-16_cc3f64628b9908c93cdc65c9162bf3ed_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5092

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=4136 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8
1⤵
PID:1352

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
38KB

MD5
4a4db3f410168cc7e00442b12128f49b

SHA1
f9d548894c04b0de7e783a9d137da25aaf21087f

SHA256
5ef2dd049aa80f08d9d47cfb901145339f69ee5070e4bd1bbf397c0765991c06

SHA512
ea191f613686e53d70aa6d9c110575b312f4668b627c23bc8fcfe2c1595797a22cec5b7ff2d1348a636efd728da5833b2013ad2275a745a201eb2d80501d9887

Download Submit
memory/1108-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1108-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1108-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1108-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1108-4-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1108-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5092-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5092-26-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/5092-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download