9c75e852d75ab7c656988cc2f80bedc3c65e64cc85ac06cfe8c2c0b0f9754956

Analysis

max time kernel
149s
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
21-11-2024 07:39

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General

Target

2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe
Size

55KB
MD5

ae5a7ad9ca67f8cee87e4f22e90ea2f3
SHA1

43a3fe52f4b8cf7dae052d2be3cb76bdf90c83f5
SHA256

9c75e852d75ab7c656988cc2f80bedc3c65e64cc85ac06cfe8c2c0b0f9754956
SHA512

680c768b0ce494f5e44198dafd49631a2102dab0d211371129cbd01e74b99dc0b3acf2dc4721d8aea16b798108555d27e7ebc3ea6f5cca9da9ca03a135558bd8
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFPx9:b7/y28wZEjbnouy8G76iH/NLpB

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:

2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

rewok.exe

pid process

4992 rewok.exe

pid	process
4992	rewok.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4440-0-0x0000000000400000-0x000000000040E000-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:

2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exerewok.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe

description	pid	process	target process
PID 4440 wrote to memory of 4992	4440	2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe	rewok.exe
PID 4440 wrote to memory of 4992	4440	2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe	rewok.exe
PID 4440 wrote to memory of 4992	4440	2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe	rewok.exe

C:\Users\Admin\AppData\Local\Temp\2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-11-21_ae5a7ad9ca67f8cee87e4f22e90ea2f3_cryptolocker.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4440
- 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:4992

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
56KB

MD5
2df334d2c8e81dc575a712eecffac9d2

SHA1
6a73aadec692804f3f7bdc26a769cbf1768a719f

SHA256
37777fed73abac7ce893af4bbd76c285e81fb12bd913c77da01aea5562cd163c

SHA512
a9b010a8d7c53c237b57aa2d40ae20c044f7a0005a5843a8dc389ec8871781801a32848ef39acbc63975ad0c8ef78860cf361ee43328f80bd15fe6b65973bffb

Download Submit
memory/4440-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4440-1-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4440-2-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/4440-3-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4992-26-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download