243bc195090933fde0746401da6cce7f8c2a2dc186ab77145736819f8968f946

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:25

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General

Target

2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe
Size

90KB
MD5

2be9262730145971c603f382cfc76630
SHA1

89ed7f6f2109aed58d7d173dbaf1d998c5535002
SHA256

243bc195090933fde0746401da6cce7f8c2a2dc186ab77145736819f8968f946
SHA512

781c39b4d2eb89d6fb8384fbc9eb732265358812edc38202b0d0da993cff40b2e734538c334e79c0933d0725edda6b01b6bd0772f9c14549608dba0458fbe30c
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/m:n6a+1SEOtEvwDpjYYvQd2P1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4820-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1744-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4820-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1744-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4820-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1744-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1744 asih.exe

pid	process
1744	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4820-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1744-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe

description	pid	process	target process
PID 4820 wrote to memory of 1744	4820	2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe	asih.exe
PID 4820 wrote to memory of 1744	4820	2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe	asih.exe
PID 4820 wrote to memory of 1744	4820	2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_2be9262730145971c603f382cfc76630_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1744

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
90KB

MD5
9748a0e600aa6b5fc83ad8aad588c9fa

SHA1
92d513614e76f4008b57d9fdd58d231f0579fccd

SHA256
78a60ca63580bab8aace65dfab5cb4611dfcb4055d35d1fe7822dc18d08dc49a

SHA512
d559dda475350314f3e0009996726f36bd1a4f1e5d3be88eb0e64e5d0ce3e30ba9d1365f646739d24c6f0f2e592ac7f6c23199c669d8fa6401d3f169eb718105

Download Submit
memory/1744-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1744-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1744-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1744-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4820-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4820-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4820-2-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4820-9-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4820-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download