edce48dd9b1dd2a0d2d4d2ce656cd9f0d8768e2fc119381f1e71706c9bc7efdc

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03-04-2024 06:43

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General

Target

2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe
Size

107KB
MD5

330fee7f685c92178f5301f458824738
SHA1

901ba4cdc95f4c57450f385ea20c4ec7f29718ca
SHA256

edce48dd9b1dd2a0d2d4d2ce656cd9f0d8768e2fc119381f1e71706c9bc7efdc
SHA512

3d709747e6dcb21e2f93c6fbc0f4053e2ef50085374a2b2dd605e8904a8293ee2cbed439be18da4ecf613ac081187e9ace994fdb8b50e7cc58cd04fece0c5021
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gkszf8q:1nK6a+qdOOtEvwDpjp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-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:

2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

828 asih.exe

pid	process
828	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/828-26-0x0000000000500000-0x000000000050F311-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:

2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe

description	pid	process	target process
PID 1240 wrote to memory of 828	1240	2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe	asih.exe
PID 1240 wrote to memory of 828	1240	2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe	asih.exe
PID 1240 wrote to memory of 828	1240	2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-03_330fee7f685c92178f5301f458824738_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1240

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:828

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
107KB

MD5
4366a65490f72cb9ddb917d2dfade3b4

SHA1
467fa8a6c04a8e06b8ecd1a67e9e1b7c28fe55ea

SHA256
0aafc030fc2b0843cce479377f0de14913ed25dbf59f0e88d906960f3918a0f2

SHA512
276c85e549daac99ae89f6251f94d8fd5c7556c93471429c0c0b5b4e2a15518376f9660db283677515852d5fcad7806c4ffae75c98b6d50b002f7a91c10ee7e9

Download Submit
memory/828-19-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/828-21-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/828-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1240-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/1240-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/1240-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/1240-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1240-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download