e2b8af9541f296edbeb2caf7e97c91c954f9fe0c3b2e08794b1d25d2983d3006

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 05:36

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General

Target

2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe
Size

97KB
MD5

59941602a219560cc7c2ca1759ffa017
SHA1

7545575b54bfd361caed2d1fa7f239b3a4cdc58a
SHA256

e2b8af9541f296edbeb2caf7e97c91c954f9fe0c3b2e08794b1d25d2983d3006
SHA512

b6edae901f1257dd828a802b47bce335e40adde77686cbbae3fb64b30c054439e0c07d697bdac77ddb4415da006cda087e7bc2ec8cd37af4ef88738e537ef6c2
SSDEEP

1536:V6QFElP6n+gMQMOtEvwDpjQGYQbN/PKwNgp0QVOa:V6a+pOtEvwDpjtzu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000200000001f656-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000200000001f656-12.dat	CryptoLocker_set1

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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1648	asih.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 4488 wrote to memory of 1648	4488	2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe	90
PID 4488 wrote to memory of 1648	4488	2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe	90
PID 4488 wrote to memory of 1648	4488	2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_59941602a219560cc7c2ca1759ffa017_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4488
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1648

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\asih.exe

Filesize
97KB

MD5
3fba7f5c436f5c7d9934be9fe4194429

SHA1
fe844ae319b4af2ec908b817a4f1cf5b3babb08d

SHA256
def12a7babfa5eb63b5c05a8f14b01f51ac9072e447ab1b3a7512c3b76472556

SHA512
bd53c79620a4abd1e605d0ba9c8af21ba69b65abb93bd3f888227f1fbb1de6642194fb6f6e0a3be1ff94e3d3e46b82725457df13aa78065ff0acf183fd49a325

Download Submit
memory/1648-17-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1648-19-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4488-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4488-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4488-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download