17005eb35cd8421740505643b6280268f850e6e23a2026e1d10afdf167a814b3

General

Target

2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe
Size

66KB
MD5

51b3ace264e2e4dd52c958d4d30fc206
SHA1

3bc0e98ce4871074df61a4aaff0eb33bd3f6f33d
SHA256

17005eb35cd8421740505643b6280268f850e6e23a2026e1d10afdf167a814b3
SHA512

87258cf1b1d1e5614b11d06e21738ea7c7b235635eb07da44e8ad50bbea90b5a13a0000ef8eb26c93e784c6f2222028310725878fa16bad4bca2a98bc7220fbf
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRL:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2368-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2368-13-0x00000000005E0000-0x00000000005F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2852-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2852-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2368-8-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2368-13-0x00000000005E0000-0x00000000005F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2852-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral1/memory/2852-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2368-8-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2368-13-0x00000000005E0000-0x00000000005F0000-memory.dmp	UPX
behavioral1/memory/2852-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral1/memory/2852-26-0x0000000000500000-0x000000000050F311-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2852 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe

pid process

2368 2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe

pid	process
2852	asih.exe

pid	process
2368	2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2368-8-0x0000000000500000-0x000000000050F311-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2368-13-0x00000000005E0000-0x00000000005F0000-memory.dmp	upx
behavioral1/memory/2852-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral1/memory/2852-26-0x0000000000500000-0x000000000050F311-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 4 IoCs

Processes:

2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe

description	pid	process	target process
PID 2368 wrote to memory of 2852	2368	2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe	asih.exe
PID 2368 wrote to memory of 2852	2368	2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe	asih.exe
PID 2368 wrote to memory of 2852	2368	2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe	asih.exe
PID 2368 wrote to memory of 2852	2368	2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_51b3ace264e2e4dd52c958d4d30fc206_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2368

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2852

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
66KB

MD5
a54193b0829fb64669eb0cd78d2c7546

SHA1
c025c0ddea1cee5d0d10de64f3da1047ae33f8cc

SHA256
7aaf76cc1df208565cb26509b892e61f98e2d93dd214188332295f173ebef628

SHA512
bec9d4ec2f9cd5f0cf99de40c47944acab0e58d4210b8e88bd3669e33d93437e0dd6b884170c45d8046f57487d80031ff259f29733b8a813faa643cc60d3a69b

Download Submit
memory/2368-0-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2368-9-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2368-8-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2368-1-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/2368-13-0x00000000005E0000-0x00000000005F0000-memory.dmp

Filesize
64KB

Download
memory/2852-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2852-18-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2852-25-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2852-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads