ff02a39ad0d32703f1491137a455e2c87fa1de121cc90f920a8c1f1392043592

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 06:22

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General

Target

2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe
Size

34KB
MD5

029fe9d1e76cdb9b3dc2952be5fcf720
SHA1

f2e5ae43965b907ee27cf34251fe336d153b35a4
SHA256

ff02a39ad0d32703f1491137a455e2c87fa1de121cc90f920a8c1f1392043592
SHA512

4e1ebfaf7bae9ef26aac96146b0ff3567002c319158d62623c67237b0645014ff64ea2edf08318a03ea207df958f1b11ad82c8354b0262aa185cd3f7ada9c559
SSDEEP

768:bROjawZEjbhxnbcuyD7U9kXfn62tH/1/LpP+j:bRO2wZEjbnouy8Gv6iH/NLpi

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

Processes:

2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

4204 rewok.exe

pid	process
4204	rewok.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3692-0-0x0000000000400000-0x000000000040D000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\rewok.exe	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

Processes:

2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exerewok.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe

description	pid	process	target process
PID 3692 wrote to memory of 4204	3692	2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe	rewok.exe
PID 3692 wrote to memory of 4204	3692	2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe	rewok.exe
PID 3692 wrote to memory of 4204	3692	2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-02_029fe9d1e76cdb9b3dc2952be5fcf720_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3692

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:4204

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

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Downloads

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

Filesize
34KB

MD5
fc7d4a308739968b306983af7a1a76cd

SHA1
6e5b35fdcdea03f59b70929a353300c0dda9e703

SHA256
f5928ed4981f8cc2be4a53952f23e0d80fc0f6fb178bffb01eeb419a96d4e094

SHA512
cdef4f6ea3216edbbaac144120b4f4ad26f36c53e39f71e8598a67fe08369a77ced82f67168ae021c2280dff5f5c919ac6adf8c52bea0257ebb541835346649e

Download Submit
memory/3692-0-0x0000000000400000-0x000000000040D000-memory.dmp

Filesize
52KB

Download
memory/3692-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3692-2-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3692-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4204-25-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download