3a1c55a176ab9c45b62da0aa6aefe6c234e4811e4db6a2c83240564b947a531e

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28/04/2024, 04:46

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General

Target

2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe
Size

67KB
MD5

b3d23378754a9e941c348ef8e9ff2f9d
SHA1

6db89799c2e2f862d09a7984e1886d8e72e6b6c8
SHA256

3a1c55a176ab9c45b62da0aa6aefe6c234e4811e4db6a2c83240564b947a531e
SHA512

1a5403de83ed3ebb3fe397e93213d6e4daf7719af7ea6fa018e9d927418d670a3da9f25f821003c512897584c06e771d7577c260b0a9c16da530b4f0242bd3c7
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszudnYTjipvF293vaRLB:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7g

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b55-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023b55-12.dat	CryptoLocker_set1

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-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation	2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4824	hurok.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 4812 wrote to memory of 4824	4812	2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe	84
PID 4812 wrote to memory of 4824	4812	2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe	84
PID 4812 wrote to memory of 4824	4812	2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_b3d23378754a9e941c348ef8e9ff2f9d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Executes dropped EXE
  PID:4824

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\hurok.exe

Filesize
68KB

MD5
79b93caa75f8042b74e10e12700efe0c

SHA1
2648bee1d5246bf755db7f9eb87cfdf26b0402e8

SHA256
e52a8f879305366895d1acf6a86ad5f3c1491abf0cde5e02b49350ac5d86952e

SHA512
cae534969553b2935c9ef01acf1c2acb6da94d9b67c14a450b8b979331ab951633b5dc2d86dfacb5ae06a0e92361fd3328c89e589fce9c0a94e3c54bdbde3069

Download Submit
memory/4812-0-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4812-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4812-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4824-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download