73351eb7bbd2d1e8c1cbd48fb3b4d98490f2d0a11a4f6bcffec84331e3bbc3f0

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 09:38

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General

Target

2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe
Size

44KB
MD5

8e34d18d352714b803a674474c12543c
SHA1

ee2c1924f241f06f4371ebcb4be48e53ae7d8429
SHA256

73351eb7bbd2d1e8c1cbd48fb3b4d98490f2d0a11a4f6bcffec84331e3bbc3f0
SHA512

9cfbae0a788c70941130ba6247ca2cc533d3c9ebb09346b152a16b44d32b6cb091a50a8383638ed96879b44795b494275d179e9429dbe10a260155321fbf89d8
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMphedQ:bc/y2lkF0+BeX

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023155-12.dat	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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5004	rewok.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 3864 wrote to memory of 5004	3864	2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe	86
PID 3864 wrote to memory of 5004	3864	2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe	86
PID 3864 wrote to memory of 5004	3864	2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_8e34d18d352714b803a674474c12543c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3864
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:5004

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\rewok.exe

Filesize
44KB

MD5
3b41d5faa72e2929738c35b6eb406ac6

SHA1
f4087fcee9e23d49f899b96ddc49ad8a9568daa6

SHA256
cbb339323db0750da5f8ce7e257d03a46d85a805eee15affb8690e0647544a7e

SHA512
8a14957298bfe9bdde28f5403da3eacd3a395022368b76f7f84da65da7bebd531c44a13fe5999ae7a7fe533176fe30b8013de9b1e96d45dd33a3ad2bbfed8038

Download Submit
memory/3864-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3864-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3864-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5004-20-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download