d5b9b0892ed5e93e663fd6b4dbca683657f311edb2cb7ea6e6db362cd92c5e81

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 22:41

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General

Target

2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe
Size

42KB
MD5

c73089bee9c2f63e98536d55c2d5e2bb
SHA1

a1e046fa63447a6fa89008378a8ae738611d9f76
SHA256

d5b9b0892ed5e93e663fd6b4dbca683657f311edb2cb7ea6e6db362cd92c5e81
SHA512

d90aff7be4f9ab014adfb2e79cabffbc755e9b3d159c767fc535c3eb2c48902fe1bf5a48fa298888b5700e5fa1b0f2ec6bf6abdef642ab57b0320e0776088036
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMvcWp8EB0W:bc/y2lkF0+B2j8C0W

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0006000000023116-12.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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation	2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4864	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 4276 wrote to memory of 4864	4276	2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe	85
PID 4276 wrote to memory of 4864	4276	2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe	85
PID 4276 wrote to memory of 4864	4276	2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_c73089bee9c2f63e98536d55c2d5e2bb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:4864

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
43KB

MD5
1e09ffb06f8ebc8f126ac219d5fb5d9e

SHA1
71b0382e4e9652cf55759a7a6f61b45217e5680f

SHA256
a211aad42015c78a36b45123a0cb614f7cc344ab62d2261d94fdfdab32657d92

SHA512
1368b6f6a1f95e43a90f0de7f9e46f6af6db50a4e3625b0a5e85649980bf6be234a5155ab79b084b05644144099274a57b1f7922d9a64204a0fc81ad1a0ee674

Download Submit
memory/4276-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/4276-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/4276-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4864-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download