ffdfbce27dc698f9ae5a22c90ba9b00da626dc3006f5425588b3d4faf819988b

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 10:37

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General

Target

2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe
Size

41KB
MD5

8e3eaed9c8841abbe02801e6d8d7006c
SHA1

f0e716dffe243ed5ff3e7dd2f94505a33e72f100
SHA256

ffdfbce27dc698f9ae5a22c90ba9b00da626dc3006f5425588b3d4faf819988b
SHA512

775cca79b9247810ab2637d898dd28e4bd2f18679a396f562e27bd8dea8f51901f6352abd984cd8d56f4bf513e00d8058a7d0ea1770850883597a538e03a4418
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHz:bCDOw9aMDooc+vAT

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3344-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2
behavioral2/memory/3916-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3344-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3916-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3916	lossy.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3344 wrote to memory of 3916	3344	2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe	88
PID 3344 wrote to memory of 3916	3344	2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe	88
PID 3344 wrote to memory of 3916	3344	2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_8e3eaed9c8841abbe02801e6d8d7006c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
41KB

MD5
78b17102565d73239c0133ff77b32cf4

SHA1
cfd9d435c3e9bfa2e2b3d7ac01a8fa0fbbfe719e

SHA256
a0849ab7048caaf57a6480f6fc75db529a2c1c6c56ab2be74e92cf739054ae60

SHA512
4b1ecbb1bc8b26471a81e74de03d6fd196c8d1d56646610da80e63d5f95e0ee46018f65185c86bc9b40ff338071a8ffda8595035f39ddfdfa790073c7db0704d

Download Submit
memory/3344-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3344-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3344-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3344-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/3344-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3916-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3916-20-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3916-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download