84d641264efdd82151f9a1daa5e493787b941e03d5fd96c1de57e2d02c46e573

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
15/05/2024, 15:21

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General

Target

2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe
Size

43KB
MD5

03fbcff82557a3836f6dd236fd483fd3
SHA1

a8605561a201cadf7c5761bd97d706bfa878425d
SHA256

84d641264efdd82151f9a1daa5e493787b941e03d5fd96c1de57e2d02c46e573
SHA512

13d710c4e608bef8a130afed8926e4d2204968e8dd671ad3af0ea848f664de297a808687fc6839d34b5a9ce224b865102024d3f990b73c126799007a26dc6f19
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHRY:bCDOw9aMDooc+vAxY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2824-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002328f-13.dat	CryptoLocker_rule2
behavioral2/memory/2824-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2200-26-0x0000000008000000-0x000000000800A000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2200	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 2824 wrote to memory of 2200	2824	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	83
PID 2824 wrote to memory of 2200	2824	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	83
PID 2824 wrote to memory of 2200	2824	2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_03fbcff82557a3836f6dd236fd483fd3_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2824
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:2200

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
43KB

MD5
f584a3fab304811c8cac53e2fdf70919

SHA1
746a65c9dbfafffc8800a76280af89349daea53d

SHA256
870cb2f2e740b824f1e27bbaff63aa4b49a8e09324a1a018b5fb2c07012f53da

SHA512
2eca201028f51e9b3becb668c3abf3bddcce87deafcea92896c2ed39624607ed68ae9949ea94daa43668c570d532bb23f69d66fc8742b885f92b66884f36a66e

Download Submit
memory/2200-19-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

Filesize
24KB

Download
memory/2200-25-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

Filesize
24KB

Download
memory/2200-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2824-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2824-1-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/2824-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2824-9-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/2824-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download