f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 00:51

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General

Target

2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
Size

69KB
MD5

cef42451928080211c4447b4d253025a
SHA1

0b995833d6352493a821fe33a649988f3856d4b2
SHA256

f255481163ab8077a97f60d879b64227fb2060397aa5304a6098dd7cd1b7a930
SHA512

57e0779f6bf430e15e65d609b27ed4227e3ed4aa4b9a6e64e1062c46e002017601dfb3df57a436ee4bda6b2db8b170ec9c70bca245991b22d89ed46d7d9273f3
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50i:DW60sllyWOtEvwDpjwF85t

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_rule2
behavioral2/memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97c-13.dat	CryptoLocker_set1
behavioral2/memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4452	asih.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 4280 wrote to memory of 4452	4280	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	85
PID 4280 wrote to memory of 4452	4280	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	85
PID 4280 wrote to memory of 4452	4280	2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_cef42451928080211c4447b4d253025a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4452

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\asih.exe

Filesize
70KB

MD5
dc53bd2ac6037be845c1e4ec4fe15968

SHA1
225d64e7e4319e92292e34d701ac8a0789030d94

SHA256
0bfa7227e7a800caa084bb5e97c9bc06dd71ba6922951ddb611fee15289df5b1

SHA512
053600368596a04d81dad2b13948d4654fa95dfe0ff35f797c8fdaafe2a9b98e2887f0377104fe221310b3a2d74c7bfbe034caf10e70e5119c73b0ed528962fb

Download Submit
memory/4280-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4280-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4280-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/4280-3-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4280-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4452-19-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4452-22-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download