75cd65af9f3cc05161873dec6a11fc1cbd8634557791c00b10574904f3dd94df

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:45

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General

Target

2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe
Size

126KB
MD5

124cbbcfdc560a7ace800d2fb2d4c7ce
SHA1

4134e845c0d9195858d4ea51e67731a0b39eb596
SHA256

75cd65af9f3cc05161873dec6a11fc1cbd8634557791c00b10574904f3dd94df
SHA512

5e8116c7eb4c3b93a0c0df83a84b252759ddb42d72cc63356ae8b992cab791d13f2b4b72e9668144406377d8c7f7fe824408f1b687506060b203307c0b691201
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eInu:AnBdOOtEvwDpj6zX

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5104-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5104-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2996-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2996-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5104-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5104-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2996-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2996-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5104-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5104-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2996-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2996-27-0x0000000000500000-0x000000000050F000-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:

2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2996 asih.exe

pid	process
2996	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5104-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/5104-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2996-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2996-27-0x0000000000500000-0x000000000050F000-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:

2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe

description	pid	process	target process
PID 5104 wrote to memory of 2996	5104	2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe	asih.exe
PID 5104 wrote to memory of 2996	5104	2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe	asih.exe
PID 5104 wrote to memory of 2996	5104	2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_124cbbcfdc560a7ace800d2fb2d4c7ce_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5104

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2996

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
126KB

MD5
8b8bb804bd91a40959efc18e11f518d9

SHA1
68760eb445900fe68d06f9116690fcc60a4e3f89

SHA256
cdf464bfe3a7d9c7f3d7a0cd6000108a195cecbae0081c101db142846588736c

SHA512
f217933d88be0465f7f064a24f885b559d0ff491d510119e3114c660b1425d299a20c4b4c94b23ffc2d43eb9f1ebb240701334645edc1b7d03668d72fb024efa

Download Submit
memory/2996-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/2996-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2996-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/2996-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5104-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5104-1-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/5104-2-0x00000000007B0000-0x00000000007B6000-memory.dmp

Filesize
24KB

Download
memory/5104-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/5104-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download