b7af2cc8cb0f57cf4a76287675717918456696f391a7fbfe80184eb8d2c3da40

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13/05/2024, 20:35

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General

Target

2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe
Size

90KB
MD5

ef04cdcafaed662e399ad16783bf6486
SHA1

0993359472b9d3993fcbf82d9afc21dfb0c8e843
SHA256

b7af2cc8cb0f57cf4a76287675717918456696f391a7fbfe80184eb8d2c3da40
SHA512

20e763143e4f6db2dee1b524ff69686798c016f13c4ca5384048fa55c4e665b4daa4a828747b7e4b7e8d8cc53f04086106ad7da0fea9929d51868a010c26a190
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAvzb:n6a+1SEOtEvwDpjYYvQd2Pv

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023278-13.dat	CryptoLocker_rule2
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023278-13.dat	CryptoLocker_set1
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023278-13.dat	UPX
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3076	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023278-13.dat	upx
behavioral2/memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3076-26-0x0000000000500000-0x0000000000510000-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 2960 wrote to memory of 3076	2960	2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe	82
PID 2960 wrote to memory of 3076	2960	2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe	82
PID 2960 wrote to memory of 3076	2960	2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_ef04cdcafaed662e399ad16783bf6486_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2960
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3076

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
90KB

MD5
842b698582239ba11074557ea739f5b9

SHA1
fdead1a9ccb1d5405184c0348f29ad46347be5aa

SHA256
3d2ef7d340fa01d39dfcfb00560e682683f95a801370209fbb2e79a745515963

SHA512
8ab15204ae1d290ed0b490d9b72ee63c8f731e3bf98fdf0ec5d450460d76aaa146be1cff880725261337d30cf9ba575dd3603a5982615407723f9d78d5a77dea

Download Submit
memory/2960-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2960-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2960-2-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/2960-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2960-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3076-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3076-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3076-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download