a9bf7842322ced32210038c7265c1cac995ea7221677324a4580fadcddbf9c48

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 21:35

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General

Target

2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe
Size

54KB
MD5

8a5565e3a13ee2e15fdd3e7b2976dbca
SHA1

d65774e4977685af6666230318afdb93328df7c2
SHA256

a9bf7842322ced32210038c7265c1cac995ea7221677324a4580fadcddbf9c48
SHA512

461bd7d1172eb60f89d02aaae2668180d0987484fd6fa35e4c7f7d0950af920ef8a79aca7f44a9f860886c22ee653ba2b722c10e6b9d11304f0bc88b4c993e21
SSDEEP

768:b7o/2n1TCraU6GD1a4Xcn62tH/1/Lp17zJIfeVEuUr6M:bc/y2lm6iH/NLp17zrV9W

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0006000000023298-12.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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3580	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 2688 wrote to memory of 3580	2688	2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe	82
PID 2688 wrote to memory of 3580	2688	2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe	82
PID 2688 wrote to memory of 3580	2688	2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_8a5565e3a13ee2e15fdd3e7b2976dbca_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:3580

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
55KB

MD5
207d5dc796da04acea2c20c98e8e3f75

SHA1
13ce7f2bf1dc4a8222017d31b98f5d2c22df2307

SHA256
a8dea8d6c0c8f8fedc032e8ef6b2dfdb43d23f1829f51a5c3b13b5577a7e0989

SHA512
8316263986512a46aad407f668a17cb3e5a122e155518e00115744e07274686e1de9714e1ecef97df9d6183e361d86ae39bea0ca884c8d97b1a19f2e0b6d78de

Download Submit
memory/2688-0-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/2688-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2688-8-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/3580-25-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download