9427334ad1e055877fc483a2f3db361d04e5e91b962f980524448ea69f25fa35

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 16:12

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General

Target

2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe
Size

42KB
MD5

903fc1129f93c7db3a2188628b450c0f
SHA1

5e16a6a5826b47060290b825cc62c218b31b68cb
SHA256

9427334ad1e055877fc483a2f3db361d04e5e91b962f980524448ea69f25fa35
SHA512

20f25fd984b166790ac9ee81719077e2d3da21988a92855c6472d331da4a310e7231e7d68545c728d943de7855fca9fdad53b1f8987d1b237bddb16d5ab50fe0
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAIis:bCDOw9aMDooc+vAls

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1524-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023b74-13.dat	CryptoLocker_rule2
behavioral2/memory/5596-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1524-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5596-27-0x0000000008000000-0x000000000800A000-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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5596	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 1524 wrote to memory of 5596	1524	2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe	85
PID 1524 wrote to memory of 5596	1524	2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe	85
PID 1524 wrote to memory of 5596	1524	2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_903fc1129f93c7db3a2188628b450c0f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:5596

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
5abe038add8e849b20b69cddb0403779

SHA1
6bf57c123c6353dd29c64a2fb89dd1efaf0dec53

SHA256
54e986fce8a5570fca2f22b2a0f67b096c1644f3b4144eb7f1e728a0b43c74ea

SHA512
02c68ff2b1a9d1b3672ac8493d70a8621188b29aca5a9e38798a6b1845a29d07bd61829997b818b7867ba30726fe56517a63fee1ff70ae0247bb49b150f4892a

Download Submit
memory/1524-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1524-1-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/1524-2-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/1524-9-0x0000000001F40000-0x0000000001F46000-memory.dmp

Filesize
24KB

Download
memory/1524-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/5596-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/5596-20-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/5596-26-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/5596-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download