48b8870e477a52ed5b39ebcd4bdce672d65c47be58f339d68d3bc18bc7743f13

General

Target

2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe
Size

105KB
MD5

b9165fd666d2870d92217ccc6ed5be23
SHA1

890bd7d409fb62616989c9ae59d9223cd7b74fe8
SHA256

48b8870e477a52ed5b39ebcd4bdce672d65c47be58f339d68d3bc18bc7743f13
SHA512

8edac65639e3556c2c42c998d3434967af9f8e31441dd60dbba519795d438c6017c067d58cec1fe829952cf743427841f7f9c92025054929fd88e91851d3bf1f
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gksa:1nK6a+qdOOtEvwDpja

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2424-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2424-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2732-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2732-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2424-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2424-15-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2732-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2732-28-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2424-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2424-15-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2732-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2732-28-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2732 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe

pid process

2424 2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe

pid	process
2732	asih.exe

pid	process
2424	2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2424-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2424-15-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2732-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2732-28-0x0000000000500000-0x000000000050F311-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 4 IoCs

Processes:

2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe

description	pid	process	target process
PID 2424 wrote to memory of 2732	2424	2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe	asih.exe
PID 2424 wrote to memory of 2732	2424	2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe	asih.exe
PID 2424 wrote to memory of 2732	2424	2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe	asih.exe
PID 2424 wrote to memory of 2732	2424	2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_b9165fd666d2870d92217ccc6ed5be23_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2424

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
105KB

MD5
ce1cb297faffc1eef6c0dde16cf960a6

SHA1
f82b7cdce18eb258883dcb3fdab7b6afd6a9dfc1

SHA256
519ee2a5e46314f05d0fe777b66760d7b3614e85f8a9ea790fc026b4343c1ef0

SHA512
3f1df6229d553fe5407eabd03d2bcffc25a596107ad639af59b59c2aee3421d766d4815061845e9fc02abdad361878780b936470ef2eef2dbeabab179fae58d8

Download Submit
memory/2424-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2424-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2424-2-0x0000000000200000-0x0000000000206000-memory.dmp

Filesize
24KB

Download
memory/2424-4-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2424-16-0x0000000001EA0000-0x0000000001EB0000-memory.dmp

Filesize
64KB

Download
memory/2424-15-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2424-27-0x0000000001EA0000-0x0000000001EB0000-memory.dmp

Filesize
64KB

Download
memory/2732-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2732-20-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/2732-19-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2732-28-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads