9f1f518d99125fdb0734c9bf9823c74e8242bcbf0b4166e11480de06a897d7e9

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 19:31

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General

Target

2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe
Size

43KB
MD5

7b240d331840a2039a2c7d1affcca173
SHA1

a86ee489b222a41cf6c0262503a77365b95af5b0
SHA256

9f1f518d99125fdb0734c9bf9823c74e8242bcbf0b4166e11480de06a897d7e9
SHA512

efd69f1beb5bb21606b1b4c97fb2702fa31c33ef7805edb83f4dba33dc09403a4c8e7022d01b302a9cea88bf18c026e1e0c1cd1001809e23716b57db4b93d1fd
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAH+:bCDOw9aMDooc+vAe

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2692-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023276-13.dat	CryptoLocker_rule2
behavioral2/memory/2692-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4340-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4340-27-0x0000000008000000-0x000000000800A000-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	2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4340	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 2692 wrote to memory of 4340	2692	2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe	82
PID 2692 wrote to memory of 4340	2692	2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe	82
PID 2692 wrote to memory of 4340	2692	2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_7b240d331840a2039a2c7d1affcca173_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4340

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
f8a484ec8b7730b97d5f661b8468a045

SHA1
400453079fde07bc23ecfb80b2307e4fd282f434

SHA256
7b6f632ef0741237359033221c2a14a6f2621cdc2086d4a3e8f7b906899f9016

SHA512
4ca5f8a4897e545a5b088a1dd8b67ceb97d74047aa64a36753de316c1e8e12ae483eb42d7871f0863ee3445472ff4f1f5e85c5c5bc4e3b63c5892d21cc60ebf5

Download Submit
memory/2692-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2692-1-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2692-9-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/2692-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/2692-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4340-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4340-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4340-26-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/4340-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download