42099fa6aeaf87bb786c9fccfdea3edd7c22e91ffe2c5c2e53807b1d982fdc4c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:29

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General

Target

2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe
Size

38KB
MD5

52163b410fc4c9b063167d3bbbbc4450
SHA1

fbfb17822fa0a03a8c9ef9a1d8f4da2d64cf2651
SHA256

42099fa6aeaf87bb786c9fccfdea3edd7c22e91ffe2c5c2e53807b1d982fdc4c
SHA512

32591b7c9a8d6c304354196655638c8c965242d1a1e70ea4e0114581b3b41814a3b5ad87a21dfeae3d98a756ae508bced409a18d8f49838d1cad971a8cf12e6f
SSDEEP

768:qTVbxjgQNQXtckstOOtEvwDpjAaD3TUogs/VXpAPWRz:qTJu9cvMOtEvwDpjppVXzRz

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5032-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5032-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5032-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-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:

2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4916 asih.exe

pid	process
4916	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/5032-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-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:

2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe

description	pid	process	target process
PID 5032 wrote to memory of 4916	5032	2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe	asih.exe
PID 5032 wrote to memory of 4916	5032	2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe	asih.exe
PID 5032 wrote to memory of 4916	5032	2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_52163b410fc4c9b063167d3bbbbc4450_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5032

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4916

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
38KB

MD5
2e58ffdf7757b37be9f2b4903fa8efba

SHA1
d1c519518e4b4ac5e6d7da735bcc2a60e2052913

SHA256
6ce9785d7c30ce6a1de54a5934ce6f3c3f11867290c70dae854175ed634bb922

SHA512
5d44e7936924735dbde37a99f2366199fcaf13b45c9c59ccf3a54b82f4adbf8f76b7a72c578e0e66b0165213f650670339a1bb403edbfeb66bf61ae4e538eeb0

Download Submit
memory/4916-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/4916-26-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5032-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5032-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5032-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5032-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5032-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download