8a9449e107fa9bc3a688f1d3ab2523eae88ee249165b4608c4c7267016ca4c33

Analysis

max time kernel
138s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 23:33

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General

Target

2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe
Size

38KB
MD5

e71d3f228d2d57e3c405b2c778a3efad
SHA1

efbb97a2414633cf7ce71f3b50d22f9a430704b8
SHA256

8a9449e107fa9bc3a688f1d3ab2523eae88ee249165b4608c4c7267016ca4c33
SHA512

e164747cb659b083a5708c9dd9d2933d591ea1cbb4aa83661af990743fee1db8d0aa6739b7654b72a7ad7e00bd1dde223b29e02e0f9858e14ac2a60c9b163b96
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXunRSy3Vq:btB9g/WItCSsAGjX7e9N0hunRv0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\gewos.exe	CryptoLocker_rule2

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exegewos.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

Processes:

gewos.exe

pid process

1064 gewos.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1064	gewos.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe

description	pid	process	target process
PID 2340 wrote to memory of 1064	2340	2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe	gewos.exe
PID 2340 wrote to memory of 1064	2340	2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe	gewos.exe
PID 2340 wrote to memory of 1064	2340	2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe	gewos.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e71d3f228d2d57e3c405b2c778a3efad_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2340

C:\Users\Admin\AppData\Local\Temp\gewos.exe
"C:\Users\Admin\AppData\Local\Temp\gewos.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1064

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\gewos.exe

Filesize
38KB

MD5
11d26def4edb4a709db0e5192c2858ec

SHA1
096a04f918872281aac80153e2683173702aae18

SHA256
05178359bd9b14d944086effba093a29d78ab88471410c74a565f6c1e3fb9887

SHA512
55f249363abc2de2b6f9caf9e240b997e50f82dc90d0690405fd54bf6d44e42a20384cb9d2eb50bd43a87fb540a7e0d896ccb231c41d9b83e40dd05ce3756fdd

Download Submit
C:\Users\Admin\AppData\Local\Temp\gewosik.exe

Filesize
185B

MD5
e3a46d1a3181190008f7ba4d0597a807

SHA1
329b5d5d1e0b3c821228bba57192d1ae1d88bec7

SHA256
1ecbaec26e3170c6ad06ccbf66843b3910fa6c367ff9bb83eea3ec3b8f7d0b55

SHA512
53f64764478660d38bd19a452ab05008ecf64374a8df292fa3d2a9acb6d304b8bae713500f49c0fb76f61fc0ad4d8b03bcc0a739a6bcbb403e90b8829d2b15ec

Download Submit
memory/1064-25-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2340-0-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/2340-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2340-8-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download