1882dfc808d58f3ab95458f69b19b3de4c37832c9b8461a88006de1d65337868

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
13-06-2024 03:28

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General

Target

2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe
Size

44KB
MD5

2d2804039bf69046c0860221650ab38d
SHA1

b34a99dfe241460a03c7f3451e2dc957ebe3f364
SHA256

1882dfc808d58f3ab95458f69b19b3de4c37832c9b8461a88006de1d65337868
SHA512

b6cde73a4f88f3bac3a5db716a78f6b77a54162b7be48ab0a2fbb337666a1a6b9f4bf48c13bc2d8386340950d9bb392dc505e3329e04af07eebbf7af6fa83032
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHts:bCDOw9aMDooc+vANs

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3800-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a00000002343c-13.dat	CryptoLocker_rule2
behavioral2/memory/3800-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/208-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/208-26-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2

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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
208	lossy.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 3800 wrote to memory of 208	3800	2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe	82
PID 3800 wrote to memory of 208	3800	2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe	82
PID 3800 wrote to memory of 208	3800	2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-13_2d2804039bf69046c0860221650ab38d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3800
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:208

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\lossy.exe

Filesize
44KB

MD5
91f232336db4a995a1af9596b7dadb7a

SHA1
b8ad2d0e02a3de92f6b93de06db043260b4efa1d

SHA256
b35dd1c88b5d0d06ddb50940acd8e560a243e9dfbf5cb6cd54a873ef8371924b

SHA512
cb94b044a11de1dccdc3d175fc269d5557ffe70987ccc5f50ab0399bba9bcb2e6d6b97015eba4f1bd77c3008da502edce532cdd41b8f26912b42fc434c1f839d

Download Submit
memory/208-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/208-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3800-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/3800-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3800-2-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3800-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3800-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download