f1dcdac810bcfb98cd2e896989843fef7d969c85d8c229b2ce791ac7b0cf70a9

Analysis

max time kernel
143s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:46

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General

Target

2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe
Size

32KB
MD5

a7f5800843e34abbdf5ef5f15a60bbf6
SHA1

ad6e6a713d9634be8b29111873941a2955d5549a
SHA256

f1dcdac810bcfb98cd2e896989843fef7d969c85d8c229b2ce791ac7b0cf70a9
SHA512

c601dd14e3912c70c27637bd0cdeb1926b09646529e0e122ab447aa6e08940d96ab919ece97017974594c3fdee1fb66301ba6f9b4d0f07bf770435f527b64dcd
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/B1RwFtsJ1:b7o/2n1TCraU6GD1a4Xt9bRwi1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

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

Processes:

2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

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

System Information Discovery
T1082

pid	process
384	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe

description	pid	process	target process
PID 3588 wrote to memory of 384	3588	2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe	rewok.exe
PID 3588 wrote to memory of 384	3588	2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe	rewok.exe
PID 3588 wrote to memory of 384	3588	2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_a7f5800843e34abbdf5ef5f15a60bbf6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3588

C:\Users\Admin\AppData\Local\Temp\rewok.exe
"C:\Users\Admin\AppData\Local\Temp\rewok.exe"
2⤵
- Executes dropped EXE
PID:384

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
32KB

MD5
1c7f37b1d82e4bd422e1e331cc0db852

SHA1
8ea570e00ab94c45d8925e39792e06988063ef30

SHA256
843a33ccd093584d9e402b459d61e5477fd4a8dbc75cb17883b2924abc0bbc3b

SHA512
38e42559518599ba3970fe3a6e6e506845aa093eb9126fecfb49fb782430e3b7932659eea7eccae4170ee911b63e9bc064ceb0113b743477686215719c7be049

Download Submit
memory/384-20-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/3588-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3588-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3588-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download