d3b9e693480b2d2483cde9c395f4834ba020a39b2801174b0edb34b18b6ff937

General

Target

2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe
Size

91KB
MD5

06018f2b5fe00b5ffe5b259add2a7a3c
SHA1

f3b31481c42af2974fdccf83a47ade306a988993
SHA256

d3b9e693480b2d2483cde9c395f4834ba020a39b2801174b0edb34b18b6ff937
SHA512

86ca04fe5edb7a74ffdbb0eb352dfab7895a3abbbf779d8aa3226c55827197f49cf610fa7bb07525cc5f6fba8bab0ad0fdc720bfef5c5ad9d4ee92a8893fd26e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/D3:n6a+1SEOtEvwDpjYYvQd2P0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1712-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2620-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1712-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2620-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1712-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2620-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2620 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

pid process

1712 2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

pid	process
2620	asih.exe

pid	process
1712	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1712-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1712-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2620-26-0x0000000000500000-0x0000000000510000-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_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

description	pid	process	target process
PID 1712 wrote to memory of 2620	1712	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe
PID 1712 wrote to memory of 2620	1712	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe
PID 1712 wrote to memory of 2620	1712	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe
PID 1712 wrote to memory of 2620	1712	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2620

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

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

Filesize
91KB

MD5
3f6c5102841a397c93f2855d23be0fb0

SHA1
323528cbf4565f251724044e72d7c388bac6cf1d

SHA256
82032e743653f508425900413729051c378bdb60c7d3cd3431abf9926f24e502

SHA512
e8ecb423d488cb828d89734a6b3d4e8eafbaa0568d4c59baf83b8108070dcea55f016bf05627c9d0b4235ca3e5e6f3331957042bf2c01ed9c8dd1683453483ab

Download Submit
memory/1712-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1712-1-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1712-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1712-9-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1712-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2620-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2620-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2620-18-0x0000000000210000-0x0000000000216000-memory.dmp

Filesize
24KB

Download
memory/2620-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads