28e09d837b577c3832dea83a3cd53f0effdfc0698f5abae347479998ab8f851d

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
06-06-2024 00:27

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General

Target

2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe
Size

42KB
MD5

b1b41e7f96c1251df4f72f25b08de746
SHA1

2e95190a3f0793c18266c934fcadd4235416445d
SHA256

28e09d837b577c3832dea83a3cd53f0effdfc0698f5abae347479998ab8f851d
SHA512

05b39f059c4aa09143d2732e95256345263988ca7538b5c00fed6f8d2d38f12dc0f4dbd7da39c029e972899cffb38bfc57244f232125b7a6ce551f4d96671d8d
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAqAA:bCDOw9aMDooc+vAqAA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2672-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000022f51-13.dat	CryptoLocker_rule2
behavioral2/memory/348-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2672-25-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/348-26-0x0000000008000000-0x000000000800A000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
348	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 2672 wrote to memory of 348	2672	2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe	83
PID 2672 wrote to memory of 348	2672	2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe	83
PID 2672 wrote to memory of 348	2672	2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_b1b41e7f96c1251df4f72f25b08de746_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:348

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
42KB

MD5
773cccf7ad03e95f9042c757cbc70e93

SHA1
05b48aaaf82affde1855a8257b48dadef415e30d

SHA256
512aea1948ccff82f60346428fdc4e98869f60d377263bcac0785d53ba72a3e7

SHA512
fc56d1c90724ca3b2d2f6e36d769a194a16ae323ec73cc1efba40fe7650defd1e220bb66e40dfc8408eb41a2df971325963004afb8652d7a0942c258a217a36d

Download Submit
memory/348-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/348-26-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2672-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/2672-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2672-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2672-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2672-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download