48957683514457bc14b440d8df1c23a9d945c2115e60715db0c1091807e0bd95

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
30-04-2024 06:32

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General

Target

2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe
Size

40KB
MD5

6d82ae3af24a48b037c000d0c863f4fa
SHA1

437bdbc33e85bcba491613ea63eebcddcda10905
SHA256

48957683514457bc14b440d8df1c23a9d945c2115e60715db0c1091807e0bd95
SHA512

f8b25116b4652f056b933f912b36c3eb1c2fe212bf2be0299f044c7bfa152d32f79dd1de9a90fdfa6bfddf6881e28cabda59850b49107b10a0ca33fd89937eed
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLNWS:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLf

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023b6f-13.dat	CryptoLocker_rule2
behavioral2/memory/2092-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2616-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023b6f-13.dat	CryptoLocker_set1
behavioral2/memory/2092-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2616-18-0x0000000000500000-0x000000000050B000-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-1-5-21-3726321484-1950364574-433157660-1000\Control Panel\International\Geo\Nation	2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2092	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 2616 wrote to memory of 2092	2616	2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe	85
PID 2616 wrote to memory of 2092	2616	2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe	85
PID 2616 wrote to memory of 2092	2616	2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_6d82ae3af24a48b037c000d0c863f4fa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2092

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
40KB

MD5
aae57781879e818585ec08064a4b933d

SHA1
8415871e32f2bd686843903a4e2ba16ec0dfd259

SHA256
944627b029060459bcb955e244b7c76e26c88533148df22a1fb43ca6159362c5

SHA512
8efecc876c37539f4016aee9e0df4dd89bbf1bda7cfece0db229eebfb060a3cbe38738bab3bb1896b3e6381ef7d3291bd777479e66d54f48852c85869c12b486

Download Submit
memory/2092-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2616-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2616-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2616-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2616-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2616-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download