ebfff2f4cae8ac3e0a4ee664ae791ccbc3bc8477da3d66df5fbf936b50b0f599

Analysis

max time kernel
134s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
04/05/2024, 21:24

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General

Target

2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe
Size

38KB
MD5

5f38a5a65108c5fa0cb31ec3e63d3a62
SHA1

c1da011353f2ec9ba50814c82e87802074b095b7
SHA256

ebfff2f4cae8ac3e0a4ee664ae791ccbc3bc8477da3d66df5fbf936b50b0f599
SHA512

2f622cfd2cc42c940c49405ec61dc943543c359350e76f1da1453d6d664d78fa7268ad1268ac693f864c6b42691cad85d0254b43235de6b7618a89844493fcde
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXunRSyHmYvevsO:btB9g/WItCSsAGjX7e9N0hunRvGIOL

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000d000000023ae7-12.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
3940	gewos.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 3344 wrote to memory of 3940	3344	2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe	83
PID 3344 wrote to memory of 3940	3344	2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe	83
PID 3344 wrote to memory of 3940	3344	2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-04_5f38a5a65108c5fa0cb31ec3e63d3a62_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3344
- 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:3940

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
4e4260bb056b41122a31d19bd3cf9a40

SHA1
86524e5389611c2b66827c4d0b2c63359bc69859

SHA256
192e040b2a0828b0b96d1684fd477663250ca5cfb2e723832dfba9b7bc8136ba

SHA512
badaf620c5bccfc490c2d91a3eb4d666294e5975fa682f3f1eb91c75bc645702c899137e64d1f330f2ce76c58e49fa9a64afe87339ca1f6038442520b567b764

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

Filesize
185B

MD5
4ceb086c6ad68d965984fef7dce617d9

SHA1
77df7215580cb5b9eb9d524f55657371046daa29

SHA256
5351b7dd33b8dcabbab4d4d66ffd97b0448fe755c4e6f6f2dcc7550a3ae55a7e

SHA512
bcb867ba0a9219eb861f4251d268b10921093d1c475d5363f88e2b0ae657acf176aa906aabc565526f9bd160951d1f6b64b91bb097b93ff13f3e8d6d5bdcb98f

Download Submit
memory/3344-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/3344-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3344-8-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/3940-25-0x00000000020A0000-0x00000000020A6000-memory.dmp

Filesize
24KB

Download