bb2bf3cd268b9baebfdc53f7388985ce6825c526d76c54fd73a7dc0867e9d32a

Analysis

max time kernel
148s
max time network
149s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 02:24

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General

Target

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe
Size

38KB
MD5

1e1160d259eaec235c7e36f0c2a69749
SHA1

4284107d223d27ab441f2b9a35160ccd811dabc5
SHA256

bb2bf3cd268b9baebfdc53f7388985ce6825c526d76c54fd73a7dc0867e9d32a
SHA512

b2761154133a1fd77871421deffeba36f2aa1cf2c66619cb227168f5aa232184abf3bf3131eacf0b925d3030d3766121179dd6a88aa17ba308f71d4bf29b93d7
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38nA:qUmnpomddpMOtEvwDpjjaYaQ8A

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2492-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2492-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2492-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2492 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

pid process

1912 2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

pid	process
2492	asih.exe

pid	process
1912	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/1912-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2492-26-0x0000000000500000-0x000000000050F000-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 4 IoCs

Processes:

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

description	pid	process	target process
PID 1912 wrote to memory of 2492	1912	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe
PID 1912 wrote to memory of 2492	1912	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe
PID 1912 wrote to memory of 2492	1912	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe
PID 1912 wrote to memory of 2492	1912	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1912

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2492

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
38KB

MD5
f3b8137c6c6bf9f002a2c0884b0874c7

SHA1
d54fbbac689bd21a881c019c5eaf341b0c88016b

SHA256
441dbd9b4facc78ff6435973e12a499a7e9aac8e4d01bf3b34b50d440867da97

SHA512
7082cb64d9e640dae515ce03e4fb2aac46fc14c8e0d87f076d74310d704b81374ab2f579df0711676c05ba6f3c332d209f3113a34b5ad47076cac90fc71daba8

Download Submit
memory/1912-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1912-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1912-2-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/1912-9-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1912-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2492-18-0x0000000000290000-0x0000000000296000-memory.dmp

Filesize
24KB

Download
memory/2492-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2492-25-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download