8c3f64de14f42fb96bf441c5f8df358a4703c1bf6e3f5d81d67878b0253d72d1

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
29/04/2024, 13:26

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General

Target

2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe
Size

41KB
MD5

22bd3d5ac5ac622950112b8ff6433110
SHA1

2b6caab58a7220ea1b57134f800fa65b31754b59
SHA256

8c3f64de14f42fb96bf441c5f8df358a4703c1bf6e3f5d81d67878b0253d72d1
SHA512

3fb4f473568b6fc451e10fc8da97aaf33b8371e21c371ba544f0e4fceeaff3719a2ea2038d25f75fd5615d86bb1b30ad9cf301fe3533f8a570fc22f23ccaf728
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtA/O:bCDOw9aMDooc+vA/O

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5076-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000f000000023b8e-13.dat	CryptoLocker_rule2
behavioral2/memory/5076-24-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1444-26-0x0000000008000000-0x000000000800A000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1444	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 5076 wrote to memory of 1444	5076	2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe	85
PID 5076 wrote to memory of 1444	5076	2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe	85
PID 5076 wrote to memory of 1444	5076	2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_22bd3d5ac5ac622950112b8ff6433110_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5076
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:1444

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
41KB

MD5
088808eade8c527bf205500b850c001e

SHA1
327875960d266ea9f20f53e38c4f23c2243b2e52

SHA256
39a63e4d3ec92d40ee24a9617e61e19f81c4ed06f3e9d031fd356073c7221581

SHA512
1d77d9ee3e27c7fc12155d7b35567212f3541279248f5cb9e87bb4dbc33e17cc8c167639f3dded0eae8f791dd0e5d025685f6b1d710577b1708d630b262bf12c

Download Submit
memory/1444-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1444-18-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/1444-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/5076-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/5076-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5076-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/5076-7-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/5076-24-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download