ee7313b5878699219627905ff12566439ca864b7c6a933ed0b1b573935c445da

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 08:26

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General

Target

2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe
Size

42KB
MD5

a5c2773b07129101c436f50006fb376e
SHA1

fc8c864d39f29970441424bd448af047482db900
SHA256

ee7313b5878699219627905ff12566439ca864b7c6a933ed0b1b573935c445da
SHA512

3699e3ae5992c2ac8df3eb573d70067d19410f66d2cf852c48054d1b425a87e1f5bc8ac122b526b650dba584219370ac0c65d7169c20a9698cd4f668b1081c54
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqAC:bCDOw9aMDooc+vAqAC

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3620-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023451-13.dat	CryptoLocker_rule2
behavioral2/memory/2464-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3620-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2464-27-0x0000000008000000-0x000000000800A000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2464	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 3620 wrote to memory of 2464	3620	2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe	84
PID 3620 wrote to memory of 2464	3620	2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe	84
PID 3620 wrote to memory of 2464	3620	2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_a5c2773b07129101c436f50006fb376e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3620
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2464

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
42KB

MD5
b20a3e31b8d5d8352dacd85b1341a1bd

SHA1
0d63a7b0745f37d22edf61a995ca3e6e4015c732

SHA256
d988bc8d37b4deca16a0dbe7e3e2e17f9ae2785e2a7c67026604008846bb1b41

SHA512
59305b5e9d6b7b2755fad92072de14c3b617736089ad057d775135707386bffcf2d7f0103317097a2a6608f042ed11da46652bb716429673fd7138706672fe51

Download Submit
memory/2464-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2464-20-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/2464-26-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/2464-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3620-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3620-1-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3620-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3620-9-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/3620-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download