3682c3c61e10af17e6b71528bf7fb053cbf7a5086354e69929b4ff980ebc6326

Analysis

max time kernel
19s
max time network
118s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
25-01-2024 15:47

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe
Size

38KB
MD5

ad42297d91540d581b44e3c4958f1833
SHA1

94e687f1bc855a2f082292586b3e825bc91a9726
SHA256

3682c3c61e10af17e6b71528bf7fb053cbf7a5086354e69929b4ff980ebc6326
SHA512

6322602edf986d3d5a164ad4e6437cf809720665821ea5ee5b9ac4895e3e25ad393b95193aa98c851f39367f72b0e247ffb279e874eff6b1a6067c346c477dc5
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxu2fR:b/yC4GyNM01GuQMNXw2PSjHPbSuYlP

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\retln.exe	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2516 retln.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe

pid process

2212 2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of UnmapMainImage 2 IoCs

Processes:

2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exeretln.exe

pid process

2212 2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe
2516 retln.exe

pid	process
2516	retln.exe

pid	process
2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe

pid	process
2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe
2516	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe

description	pid	process	target process
PID 2212 wrote to memory of 2516	2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe	retln.exe
PID 2212 wrote to memory of 2516	2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe	retln.exe
PID 2212 wrote to memory of 2516	2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe	retln.exe
PID 2212 wrote to memory of 2516	2212	2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_ad42297d91540d581b44e3c4958f1833_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2212

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
- Suspicious use of UnmapMainImage
PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
39KB

MD5
69eb027d7f0b225d77b019da076ac9f8

SHA1
dde8c9b5c16283559b622d9aca10686b14e868d2

SHA256
32fed0cf08c4fe088df070ccdc4ced3350870ddf4351a4fd3c59e7e4f8cd3e9d

SHA512
8a9861c38144d4acff192e8e93e080b11da6c68be472c380b6d374bcae6ec13584b789ae8723aa7f05a1ea552905c1cf60a09e33fa29078e0ae4385e27286d4d

Download Submit
memory/2212-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2212-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2212-7-0x00000000003E0000-0x00000000003E6000-memory.dmp

Filesize
24KB

Download
memory/2516-23-0x00000000003F0000-0x00000000003F6000-memory.dmp

Filesize
24KB

Download