3f34a18e027dd2b798bc28341c948df1772ed552090c6041ffe71fd592175fc0

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
08-06-2024 07:04

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General

Target

2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe
Size

57KB
MD5

3bf485761dd9a09e91c9fb6d968deb71
SHA1

293f3d9a6e5ab495dbe1fa78e3d35d34c6fd9373
SHA256

3f34a18e027dd2b798bc28341c948df1772ed552090c6041ffe71fd592175fc0
SHA512

c02ff2b3dbb38972f2fdfc704e584d207b0d86a4816aa03b824b164cc4a57d62176a17ff4cb5c39df1d325aa8a681ba745f84981e40a3a507f589e476baa77d5
SSDEEP

768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzCY:bP9g/xtCS3Dxx0nCY

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/memory/4732-0-0x0000000000400000-0x000000000040E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023403-13.dat	CryptoLocker_rule2

UPX dump on OEP (original entry point) 2 IoCs

resource	yara_rule
behavioral2/memory/4732-0-0x0000000000400000-0x000000000040E000-memory.dmp	UPX
behavioral2/files/0x0008000000023403-13.dat	UPX

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5064	gewos.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4732-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral2/files/0x0008000000023403-13.dat	upx

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 4732 wrote to memory of 5064	4732	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	81
PID 4732 wrote to memory of 5064	4732	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	81
PID 4732 wrote to memory of 5064	4732	2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe	81

C:\Users\Admin\AppData\Local\Temp\2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_3bf485761dd9a09e91c9fb6d968deb71_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4732
- C:\Users\Admin\AppData\Local\Temp\gewos.exe
  "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
  2⤵
  - Executes dropped EXE
  PID:5064

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
58KB

MD5
d04326b598b450c027e1e5cf681d35c9

SHA1
3770ada6ec453b0995ade6ade3eeef699f659d96

SHA256
4ba62121f38d2ef456729e744aa48dc0bf03d5d5f0f9127b125e20bf503cdaba

SHA512
cd84b39bc3340f86c27d3f6f86c1fb3f701add8e4c71df6e6611a2433c37be975f569b731a8c581c8b1198925c3a4dcecd3f2a19cf01c81455a4220dbfcf48b2

Download Submit
memory/4732-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4732-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4732-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4732-9-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/5064-26-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download