51fba9bcf3977b1d408154b6c8deb016222bb604ab39f08f37aac56812a85a21

General

Target

2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe
Size

49KB
MD5

80041a25539fcbaa8dfe99b3ecc05889
SHA1

7581916b7dffe84b187252bf96c36b75de10717a
SHA256

51fba9bcf3977b1d408154b6c8deb016222bb604ab39f08f37aac56812a85a21
SHA512

d9000110dcc947f04e9e6ed3d1d070b37782fa86a1a889a84ef3531e7313435380c7340b1868df03bb7d7aceab63e703f76c8be9ad487ea9a2b1ee78c36316d9
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIKn:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7V

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_set1

Executes dropped EXE 1 IoCs

Processes:

hurok.exe

pid process

3024 hurok.exe
Loads dropped DLL 1 IoCs

Processes:

2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe

pid process

1984 2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3024	hurok.exe

pid	process
1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe

Modifies system certificate store 2 TTPs 2 IoCs

Install Root Certificate

T1553.004

Modify Registry

T1112

Processes:

hurok.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	hurok.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	hurok.exe

Suspicious use of UnmapMainImage 2 IoCs

Processes:

2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exehurok.exe

pid process

1984 2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe
3024 hurok.exe

pid	process
1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe
3024	hurok.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe

description	pid	process	target process
PID 1984 wrote to memory of 3024	1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe	hurok.exe
PID 1984 wrote to memory of 3024	1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe	hurok.exe
PID 1984 wrote to memory of 3024	1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe	hurok.exe
PID 1984 wrote to memory of 3024	1984	2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe	hurok.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_80041a25539fcbaa8dfe99b3ecc05889_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1984

C:\Users\Admin\AppData\Local\Temp\hurok.exe
"C:\Users\Admin\AppData\Local\Temp\hurok.exe"
2⤵
- Executes dropped EXE
- Modifies system certificate store
- Suspicious use of UnmapMainImage
PID:3024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
49KB

MD5
0160ef8c684cecb7c8380de4bf3e53d5

SHA1
643718a5b4f8a48dda3df96cc7e574b4ff605722

SHA256
5d1f1ad9aabdc9e93c8c5fb46c2546d3792e526c855ee37a7045f8333bdb795d

SHA512
ca60e33b4a2bc48d7ac00821bc264d422b67ac9516037fb7068f40cae977e29aa0f78cb6d265bc9da4cde3c38d39f3957902356d51a4ef42dfbba812f641c742

Download Submit
memory/1984-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1984-0-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1984-7-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/3024-22-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads