a4263741b2fb24e81dc06b40bfca3f9f891e08fdc3b18c5ee9075511a159b3b1

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
22-05-2024 01:46

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General

Target

2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe
Size

79KB
MD5

62fb5ca4613684aadc8d1936744d8a2e
SHA1

f4542bfad25904f697d35837538895612094662c
SHA256

a4263741b2fb24e81dc06b40bfca3f9f891e08fdc3b18c5ee9075511a159b3b1
SHA512

87dc886eaddcd52798650384ad5a6387b2782760fdb5375e7a2625078613be7e84b74c072d3e697a893a68bdfbab3e58f6643b902e65412ac0e6a16334faf5f1
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRk:T6a+rdOOtEvwDpjNth

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2784-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2784-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2784-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2784 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

pid process

2316 2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

pid	process
2784	asih.exe

pid	process
2316	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2784-25-0x0000000000500000-0x0000000000510000-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:

2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe

description	pid	process	target process
PID 2316 wrote to memory of 2784	2316	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe
PID 2316 wrote to memory of 2784	2316	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe
PID 2316 wrote to memory of 2784	2316	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe
PID 2316 wrote to memory of 2784	2316	2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_62fb5ca4613684aadc8d1936744d8a2e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2316

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2784

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
79KB

MD5
367bebedc40c85ae34cb188fde31be33

SHA1
57df7d3daca64e478d696c4f8864b395664d7685

SHA256
16b3771492d110ea7ef5953bf85a51b689899dc45091e59a98000234de5c7e0a

SHA512
19aa8fd98fa032113707354f1fade4a1996bfd102eae9ad2a0d0bf42672e094cc9d12c8b19ce8c4e44ac1163786467b7ee9d9ec07e5f3ae637554709d2aee358

Download Submit
memory/2316-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2316-1-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2316-2-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2316-9-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2316-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2784-17-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2784-24-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2784-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download