8c6e239bfa6d8194543097f37ae0ebe8ef36179d856ab5d952294325c6537175

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
22-05-2024 02:23

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General

Target

2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe
Size

77KB
MD5

139e09bbab09f11bd56e551a1e6ac599
SHA1

8999c0c53e3d7a0915b7e031634b451257e3e077
SHA256

8c6e239bfa6d8194543097f37ae0ebe8ef36179d856ab5d952294325c6537175
SHA512

f2905ebffb9c5c876d825280fa9efdd221e73c751064b2dfabe4138bb17943fb543032ca2b8f62bb8c51a8b1be26f1bc45d0dde74058983a9438de6a0efefb4d
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1i:T6a+rdOOtEvwDpjNtHPF

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2264-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2512-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2512-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2264-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2512-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2512-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2264-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2512-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2512-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2512 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe

pid process

2264 2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe

pid	process
2512	asih.exe

pid	process
2264	2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2264-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2512-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2512-25-0x0000000000500000-0x0000000000510000-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_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe

description	pid	process	target process
PID 2264 wrote to memory of 2512	2264	2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe	asih.exe
PID 2264 wrote to memory of 2512	2264	2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe	asih.exe
PID 2264 wrote to memory of 2512	2264	2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe	asih.exe
PID 2264 wrote to memory of 2512	2264	2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_139e09bbab09f11bd56e551a1e6ac599_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2264

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2512

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
77KB

MD5
efb625814055c9465fe4cf195293e8ae

SHA1
b64519e2ad5a8c662d80bda243d01a4c514d09fe

SHA256
80b0e74ca438df8585adebe225121c29abf32c28f5735d9c05b6ba24484ae059

SHA512
5b8893d719dac660aaf614644ccc7c2d182e9d04dc2080cb09b22eaa78dd7c541a43e928dc1c452f635677f8bf5154b4397fe54960deb45497465f101f2ed09b

Download Submit
memory/2264-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2264-1-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2264-3-0x0000000000340000-0x0000000000346000-memory.dmp

Filesize
24KB

Download
memory/2264-2-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download
memory/2264-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2512-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2512-18-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2512-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download