b42dc00581ff988fd9ff28ce3d257457f096e75f90ce51c54ec287ebbd665279

Analysis

max time kernel
135s
max time network
137s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17/04/2024, 15:46

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General

Target

2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe
Size

50KB
MD5

d5755c53bcdd75b52e24ddb0d7b1afaf
SHA1

baf478333f0a2e4da31f0a961ab2290a55479088
SHA256

b42dc00581ff988fd9ff28ce3d257457f096e75f90ce51c54ec287ebbd665279
SHA512

b40a1c195db5b8727269c4496725290c6a85223ed21da195929efeec396d6ab2233c253bf4b2659f2b0189fe069f9388633b22d063b34d3a333f3c113cdc14fd
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAI4E:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7g

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9b1-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001e9b1-12.dat	CryptoLocker_set1

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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
1068	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 4164 wrote to memory of 1068	4164	2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe	88
PID 4164 wrote to memory of 1068	4164	2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe	88
PID 4164 wrote to memory of 1068	4164	2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-17_d5755c53bcdd75b52e24ddb0d7b1afaf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  PID:1068

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
51KB

MD5
f3fd3db5cfef9fe6c999cfa768366fe0

SHA1
bc5606ba18cd29a45f26799a3ad02f637d2719a7

SHA256
67c7d7eca4859314398b3806991550be1f0cca7fa1beeb0878923ef97a61a92a

SHA512
2540dc3202f85d65f1f5ab61ab2d0096b12a37f848a0d8c773aa8ea1eb90c62cbcba51810b3e3a39e4bb05d7725d16675e9dc7eb3824dec8e0782e183fdb5b80

Download Submit
memory/1068-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4164-0-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4164-1-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4164-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download