fb8ec63711aed81d81e846bbd2dd337e70cea667d6e220c1442122a91c905043

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
15/06/2024, 07:45

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General

Target

2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe
Size

59KB
MD5

ecce43abb051280b272162f99549bfd6
SHA1

ed247fc7adb77036a5fce8b7885b84673a41c332
SHA256

fb8ec63711aed81d81e846bbd2dd337e70cea667d6e220c1442122a91c905043
SHA512

0b8480d6afab109ac823f50c5da9ec42deea171a2a0701349321888128ee04f4c7081820cd002224f6aecddf645a5bbcfd71e41df101d93e437b4dee1278d3b5
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5ax+N8:z6QFElP6n+gKmddpMOtEvwDpj9aYaz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000234e7-13.dat	CryptoLocker_rule2
behavioral2/memory/4420-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000234e7-13.dat	CryptoLocker_set1
behavioral2/memory/4420-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000234e7-13.dat	UPX
behavioral2/memory/4420-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00090000000234e7-13.dat	upx
behavioral2/memory/4420-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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 4420 wrote to memory of 4136	4420	2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe	90
PID 4420 wrote to memory of 4136	4420	2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe	90
PID 4420 wrote to memory of 4136	4420	2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_ecce43abb051280b272162f99549bfd6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4136

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=4056,i,8447163055677043976,7218082390179600880,262144 --variations-seed-version --mojo-platform-channel-handle=4572 /prefetch:8
1⤵
PID:3424

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
59KB

MD5
b6b949b1b7f9178f7417d69c467725de

SHA1
77c13ccc710171077d58ed055b98e4c7c7f7696c

SHA256
8a970205b6d1f9569fe56e15513f7b96d6b3c12b9b44c96fd24cab8a9bdfce65

SHA512
619648d9bdcb21f52e43151dadd323520ebd89aa15f47a9eb94ebe6508c1fb55ce8845b27607b78b0066a8c9306bb1288c6e0e723b730776af273fdfa85f5fa8

Download Submit
memory/4136-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4136-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4420-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/4420-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4420-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4420-9-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/4420-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download