78d1c6a75723b8b1ff62094f6153265a6e6fbf8a8c061ff36509923a55f5e5ed

Analysis

max time kernel
147s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22-02-2024 12:57

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General

Target

2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe
Size

35KB
MD5

b545c14bf1b8d3ca18769d6bd5b8e506
SHA1

b4cb11986bc1c7bcd4ccfb1a94ffd68930fc61b6
SHA256

78d1c6a75723b8b1ff62094f6153265a6e6fbf8a8c061ff36509923a55f5e5ed
SHA512

ef869bfe1fb8bc43cfe057c653ab566ff2060415bf536c005be366f391bb63a53ef65398c9caa558744c53d6cf91ae9ca1ef8816793bc0b1d9ed9b170fa750b7
SSDEEP

384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiA0jgg183z:btB9g/WItCSsAGjX7e9Nd

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f5-12.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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation	2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation	gewos.exe

Executes dropped EXE 1 IoCs

pid	Process
4060	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 640 wrote to memory of 4060	640	2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe	86
PID 640 wrote to memory of 4060	640	2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe	86
PID 640 wrote to memory of 4060	640	2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_b545c14bf1b8d3ca18769d6bd5b8e506_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:640
- 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:4060

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
36KB

MD5
4cd5a0ef3095f3934a4ff8a894540e03

SHA1
b84c289ecbd0718cb7a1f3075e34d715b5ccd295

SHA256
4a94212409f60d48d80ff9647e4def8014f8031bb2e6a43cc3fc9a9c74194e08

SHA512
ff8343fd75e65ddeb449438a087aa30386106230bc29b148378cdfa478b538f5c277f8a472bfb03783423b21345643b081fcc3b01cc982f8d741c6a06a9d5152

Download Submit
memory/640-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/640-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/640-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4060-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download