66fa189e305e0c41c1608530ca43ac695a63794a4f5c8b35181896724ef8dc8c

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-04-2024 00:59

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General

Target

2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe
Size

50KB
MD5

b7d0586fa0930727a392a6e831aa310e
SHA1

1d7db160340d894ba19b6db96f8f04fb0a04f8f7
SHA256

66fa189e305e0c41c1608530ca43ac695a63794a4f5c8b35181896724ef8dc8c
SHA512

b980c077e631fecdc2dfb779b34dbb308209812995515065fd6853452dfee2437bb6ca415b7869032e1faba91d7e3728f913e29cebca98b282238c54c4fafff0
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIm:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7x

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x00080000000122cd-10.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral1/files/0x00080000000122cd-10.dat	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
1200	hurok.exe

Loads dropped DLL 1 IoCs

pid	Process
2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe
1200	hurok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 1200	2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe	28
PID 2780 wrote to memory of 1200	2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe	28
PID 2780 wrote to memory of 1200	2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe	28
PID 2780 wrote to memory of 1200	2780	2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_b7d0586fa0930727a392a6e831aa310e_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Users\Admin\AppData\Local\Temp\hurok.exe
  "C:\Users\Admin\AppData\Local\Temp\hurok.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:1200

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\hurok.exe

Filesize
50KB

MD5
2f3cfc434f89d68cd7888e6799c28508

SHA1
1ce801902f941ca55c3ed73f7c797928bfe6f6ce

SHA256
5802f19196f4d0876955cdfc789f5ef61c50a2e940b6d56bdcd0caba048d12ba

SHA512
40ecd271770cbb1cd87019e186df05792de4ab33d350bd44764d88c6c42bb0a5f52b4d17675e1922ab3ade0440c1307b9b136847ea2f369097ff1553441b36a7

Download Submit
memory/2780-0-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download
memory/2780-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2780-2-0x0000000000230000-0x0000000000236000-memory.dmp

Filesize
24KB

Download