621e8d1f820d47e40341807bf25c626ebc8fb36c66c2810e74860993bbc2935d

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 03:31

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General

Target

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe
Size

64KB
MD5

e2a39bf47f2ba9ac8e1ab2a18c5a4e8a
SHA1

02b5cc51b5913fb9ac7d429adfda9ac18a1933e5
SHA256

621e8d1f820d47e40341807bf25c626ebc8fb36c66c2810e74860993bbc2935d
SHA512

e04d591e9273fad17a958f46dec25d5b62ab4418ad6086233804b2019559debeba3ec6c884ab2ec2eca568bf82ca043ab7e3bc5ffc84d85aa7ab952497d78dd8
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsie:BbdDmjr+OtEvwDpjM8j

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1276-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1276-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1276-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1276-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1276-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1276-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3028 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

pid process

1276 2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3028	asih.exe

pid	process
1276	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe

description	pid	process	target process
PID 1276 wrote to memory of 3028	1276	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe
PID 1276 wrote to memory of 3028	1276	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe
PID 1276 wrote to memory of 3028	1276	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe
PID 1276 wrote to memory of 3028	1276	2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e2a39bf47f2ba9ac8e1ab2a18c5a4e8a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1276

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
64KB

MD5
4c003ebf59df5d99c43c961e8169dadf

SHA1
002d14d42ec05f55bdeb95d89fa5327d0d0030ed

SHA256
22d36e6d620575bc4ae61e1111764b95bb62aff60b4ab9ebe0a2c83b680a893b

SHA512
4509c5ac96677d19c05b21d3ecf187505775cc4946ae350a7a6eb2eb2baed38a7a0175402ab4ab00f72094af9c0bdbb274d3c8175b5cdb6ecdf447a528220e1d

Download Submit
memory/1276-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1276-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1276-2-0x00000000004A0000-0x00000000004A6000-memory.dmp

Filesize
24KB

Download
memory/1276-9-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/1276-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3028-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3028-19-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/3028-26-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/3028-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download