bbef5cad315a62cef6e47b26c543423289fabf70e2c855b75d53965a4fa807f2

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 05:36

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General

Target

2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe
Size

89KB
MD5

d42b1a1b52ca0d24a376898270cec800
SHA1

546213e4d8fe4f48305ec356414a10e244259fc0
SHA256

bbef5cad315a62cef6e47b26c543423289fabf70e2c855b75d53965a4fa807f2
SHA512

bbf6a46634d5f64d87b4b52ad48fdd3ab7af6d57921ccf94ff9678501e47b9fdecc4053683050816f3e2f8b2a8d6203f19b5b7273710faea5c68492a0424ef52
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAs:n6a+1SEOtEvwDpjYYvQd2Ps

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4756-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b59-13.dat	CryptoLocker_rule2
behavioral2/memory/4756-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4756-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b59-13.dat	CryptoLocker_set1
behavioral2/memory/4756-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4756-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c000000023b59-13.dat	UPX
behavioral2/memory/4756-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1804-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1804	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4756-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c000000023b59-13.dat	upx
behavioral2/memory/4756-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1804-26-0x0000000000500000-0x0000000000510000-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 4756 wrote to memory of 1804	4756	2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe	83
PID 4756 wrote to memory of 1804	4756	2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe	83
PID 4756 wrote to memory of 1804	4756	2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_d42b1a1b52ca0d24a376898270cec800_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4756
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1804

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
89KB

MD5
918a1c3ca3d06e510e7a799d2c43c965

SHA1
22ce8c3ad19bad4c0b1877e4cfea6a3c9cb6cb26

SHA256
5464d94fa86c375abf07f49fcd13d3c0a422ed9cae1e512a516bbac2201d613e

SHA512
f129fcd72710de6c257d75518926c7be65c2dfb604038effb8d3ece615f5f378d3bc5a22f2338f8387f8de0f9b0180147a4ff0a652fc5862b15484f2b8b8bf07

Download Submit
memory/1804-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1804-25-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/1804-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4756-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4756-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4756-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4756-9-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4756-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download