b074e3bbe29a39409f2d9c988a5077ed10276a44d77d7bcbbdce057818728d5d

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12-09-2024 03:33

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General

Target

2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe
Size

55KB
MD5

5a1561b2d061b39f392bf76e245b5b3f
SHA1

8f6240266d89a25f7f42c74424864a6a0831050c
SHA256

b074e3bbe29a39409f2d9c988a5077ed10276a44d77d7bcbbdce057818728d5d
SHA512

e2e86270fc9e973a32cca67d8021a768e1329053676a6111d639700a69532525f7503bfa7bfe0a0b4df7bcbdcabf656c6cbeb38440931151c2725c4aafc7f002
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFPX:b7/y28wZEjbnouy8G76iH/NLpN

Score

7^/10

discovery upx

Malware Config

Signatures

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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
808	rewok.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3764-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x00090000000233dc-13.dat	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3764 wrote to memory of 808	3764	2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe	85
PID 3764 wrote to memory of 808	3764	2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe	85
PID 3764 wrote to memory of 808	3764	2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-12_5a1561b2d061b39f392bf76e245b5b3f_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3764
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:808

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe

Filesize
55KB

MD5
05ee11197222fef818e4806c780d2488

SHA1
f9a894ccb4f45afc7f3c35cf2f69787f4d2bd187

SHA256
246e62d3ace8892f5a202accea19ba5c53df2b9369b9987110f4cecb7fc6a1f0

SHA512
24504f754e72d3c2b934e35dafc1c5a14974bbc2b54c5387e99d75a73d019a937e6302c818be9a08d0459a57c88f356f30857be49846139d7e6446132c2e3ac4

Download Submit
memory/808-26-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3764-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/3764-1-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/3764-2-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/3764-4-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download