3b576b0afac0ed30322bd31694b766a82860e604e1116dc27075ccbbb7d05413

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 14:31

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe
Size

51KB
MD5

1d7578e4eacf4817d86ffad967345fd9
SHA1

f2a434ad498753ff130d1f5f955c89ad4a557467
SHA256

3b576b0afac0ed30322bd31694b766a82860e604e1116dc27075ccbbb7d05413
SHA512

1c54fe82cfc173b8efa6f766bb8d51425b10795eaad20abae1a253f1c3b64d5c60f02adf20457f0bfe38045d35342440738f7c03cf262a57d1923d12c483880e
SSDEEP

768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtXs:bODOw9acifAoc+vXs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4664-0-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/1512-17-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4664-25-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1512-27-0x0000000008000000-0x000000000800F000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/4664-0-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-13.dat	UPX
behavioral2/memory/1512-17-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/4664-25-0x0000000008000000-0x000000000800F000-memory.dmp	UPX
behavioral2/memory/1512-27-0x0000000008000000-0x000000000800F000-memory.dmp	UPX

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1512	lossy.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4664-0-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-13.dat	upx
behavioral2/memory/1512-17-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/4664-25-0x0000000008000000-0x000000000800F000-memory.dmp	upx
behavioral2/memory/1512-27-0x0000000008000000-0x000000000800F000-memory.dmp	upx

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 4664 wrote to memory of 1512	4664	2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe	83
PID 4664 wrote to memory of 1512	4664	2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe	83
PID 4664 wrote to memory of 1512	4664	2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_1d7578e4eacf4817d86ffad967345fd9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1512

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\lossy.exe

Filesize
51KB

MD5
36e21ac963d70f18f7776c77b96db93f

SHA1
f34cba3e454183371416c7dadd5dce874a2f3684

SHA256
b485c8c7b3cf3921e86e4e7bfeab0270a0d051b1fa5c2705934b11fa8af73b51

SHA512
c27d03b0d0bf72d2a311771e12ac2b11821a845443c7228561083c205f6f00e4054b61ced0b5625bce130b95c047f54238df658ca51dae1a13ed5b07fa4ebf66

Download Submit
memory/1512-17-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/1512-19-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/1512-26-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1512-27-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4664-0-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download
memory/4664-1-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/4664-9-0x0000000002130000-0x0000000002136000-memory.dmp

Filesize
24KB

Download
memory/4664-2-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4664-25-0x0000000008000000-0x000000000800F000-memory.dmp

Filesize
60KB

Download