efd51fabae9ec6774612f6448d5bcf4d1a3c9dcea3373b037b0e8b2e9b9a6727

Analysis

max time kernel
150s
max time network
152s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 01:31

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General

Target

2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe
Size

62KB
MD5

344310b03c131089e24d45897178333f
SHA1

c4842ab709ecc77f68054b1c24f7cb184a8ef3c0
SHA256

efd51fabae9ec6774612f6448d5bcf4d1a3c9dcea3373b037b0e8b2e9b9a6727
SHA512

fd2eee59aa825391cfcdb05af24cfd7d26a318d0455bb9df9753c09c938392f56ffc63f7aedea5b8b719d330817157cc24613224f7c922af2abbf21a3f03e738
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1x/9lfL+gniDSc92:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7I

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012256-10.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012256-10.dat	CryptoLocker_set1

Executes dropped EXE 1 IoCs

pid	Process
3032	hurok.exe

Loads dropped DLL 1 IoCs

pid	Process
1660	2024-02-23_344310b03c131089e24d45897178333f_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
1660	2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe
3032	hurok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 3032	1660	2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe	28
PID 1660 wrote to memory of 3032	1660	2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe	28
PID 1660 wrote to memory of 3032	1660	2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe	28
PID 1660 wrote to memory of 3032	1660	2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_344310b03c131089e24d45897178333f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:1660
- 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:3032

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
62KB

MD5
ff5bceda15635580f6724426880a2ed0

SHA1
739a9dca5790c949f7d67a11e6beb87a70b90867

SHA256
04e3a47acead1e5e620dee55b706be4f5fd1b3afb1d1f05bc79a32019a28461b

SHA512
893a7d3046418c9403da1d28105e4717fef74da60e07f643d9d6dcfa06e8d90e78f8a74c7e3c784eea384b1811f97bef1baac37c932aecc475958b0600572056

Download Submit
memory/1660-0-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/1660-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1660-2-0x00000000001C0000-0x00000000001C6000-memory.dmp

Filesize
24KB

Download
memory/3032-16-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download