5bf0ca7f4adc92329c756c3a45ea959676eef4e759bb98668dd4f76c0089eb81

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/03/2024, 00:46

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General

Target

2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe
Size

49KB
MD5

a3f57a3ef68e0f832f43a9dbece0d48f
SHA1

5efca3be12ebf31e6ffc7a408442bc91f2d7b4a9
SHA256

5bf0ca7f4adc92329c756c3a45ea959676eef4e759bb98668dd4f76c0089eb81
SHA512

198eb22414c99184c111c529cb6942c072c6e1442cc616b08878b5f24aa423af9ab6d8719495119493ac8fd30a187219cdc1ca907d144841f5331172bc2e6cdf
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIBe:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7f

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002321e-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002321e-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	hurok.exe

Executes dropped EXE 1 IoCs

pid	Process
1636	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 4184 wrote to memory of 1636	4184	2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe	90
PID 4184 wrote to memory of 1636	4184	2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe	90
PID 4184 wrote to memory of 1636	4184	2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-07_a3f57a3ef68e0f832f43a9dbece0d48f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4184
- 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:1636

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
50KB

MD5
17fb83de59cc0c22b63f6cd355992e71

SHA1
2d04abe40bfaa1a8caddcac15c23e5e12edb9191

SHA256
a31bfed5f6888a8793d55a7d7362b74e77eb21b220a09e0bd0612cc5ba2c9874

SHA512
f24655e3b4b10b4fb630d4cb2abd1a07fd2d2e14db88925c9e9b21d167ee16f87f9631c8d3aa1488cf8c9beb91bc24cfc41f9d498f4274e25cba1ddf7a99f3a3

Download Submit
memory/1636-25-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4184-0-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4184-1-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4184-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download