d265a9d163f39bc2ef88e34362bdad45f3974b721f79c0deea1318fc87e84b8e

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 15:31

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General

Target

2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe
Size

23KB
MD5

2fb0e5dcb3ed224d26670b2e730393c6
SHA1

4ee75633deb351a204242ed36c192ef874753a96
SHA256

d265a9d163f39bc2ef88e34362bdad45f3974b721f79c0deea1318fc87e84b8e
SHA512

553b870b38d0ebc94923a73fc30a2c28d84cc521248113614596de3cbf6fcc8ee8df86dfc7868c3817801d3ce9b9941d1884e3a2bbe27fdd21321f487f482406
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HM8:bVCPwFRo6CpwXFXSqQXfjAs8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral1/memory/1132-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2756-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2756-28-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\hasfj.exe	UPX
behavioral1/memory/1132-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2756-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral1/memory/2756-28-0x0000000008000000-0x000000000800E000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2756 hasfj.exe
Loads dropped DLL 1 IoCs

Processes:

2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

pid process

1132 2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

pid	process
2756	hasfj.exe

pid	process
1132	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1132-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\hasfj.exe	upx
behavioral1/memory/1132-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2756-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral1/memory/2756-28-0x0000000008000000-0x000000000800E000-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:

2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe

description	pid	process	target process
PID 1132 wrote to memory of 2756	1132	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe
PID 1132 wrote to memory of 2756	1132	2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_2fb0e5dcb3ed224d26670b2e730393c6_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1132
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:2756

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\hasfj.exe

Filesize
24KB

MD5
d40031619c812bca4f0d40942b0a4836

SHA1
78efbb00378a864a8e98ed0f7e139c00bc8961c4

SHA256
b98e0bb723ee2f870c9319ce73aa5d7d209c792445341fc78307b5a319a59d4a

SHA512
445c02d30b6a763aff9a0445653c98e15142eb4bcf52a62f5bfa05b4f1cdc7610f4a28642888cb3e8d49d1908c04790a37e9ca09416b0fdd6b8a4853b4a48839

Download Submit
memory/1132-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1132-9-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1132-2-0x0000000000480000-0x0000000000486000-memory.dmp

Filesize
24KB

Download
memory/1132-1-0x0000000000470000-0x0000000000476000-memory.dmp

Filesize
24KB

Download
memory/1132-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1132-14-0x0000000001F90000-0x0000000001F9E000-memory.dmp

Filesize
56KB

Download
memory/2756-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/2756-20-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/2756-27-0x00000000002A0000-0x00000000002A6000-memory.dmp

Filesize
24KB

Download
memory/2756-28-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download