a3d12b0f2a5198edeab28db81962ad1e2e23e33ae0c0c9ce9d477c29803626df

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 22:26

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General

Target

2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe
Size

77KB
MD5

38640093143e2352527195b0ea471baa
SHA1

7d3ddec04623b65e1079fa5ba0b35b55d0847981
SHA256

a3d12b0f2a5198edeab28db81962ad1e2e23e33ae0c0c9ce9d477c29803626df
SHA512

3be367bc7ab962eec19e4d383bd69ea0a183e81cd56f7a6da3ea072dd6cd0071d0673f7e98c51dd6153181850733406a1c1b1c7fd7bda3821ec11f91d06d216e
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsoLkd:X6a+SOtEvwDpjBZYvQd2u

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\asih.exe	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

Processes:

2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3304 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3304	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe

description	pid	process	target process
PID 1140 wrote to memory of 3304	1140	2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe	asih.exe
PID 1140 wrote to memory of 3304	1140	2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe	asih.exe
PID 1140 wrote to memory of 3304	1140	2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_38640093143e2352527195b0ea471baa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1140
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3304

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
77KB

MD5
689301c7b635ff93cf9cc75b989140e4

SHA1
739be8aa89d0258a61a6d08a2c011bd31e75c708

SHA256
2e4f2eb5ab56f2b8f639ec9a81a4e227dfc300af79952f02a750e56b24bf8446

SHA512
ceeac42faecee6ce1c35032789d5748a6f21823644a1cdc530e03e523757d68a77f70d1a532962371c31791050a7611a4d3b0192c56246c9256088a7159cffad

Download Submit
memory/1140-0-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/1140-1-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1140-8-0x0000000000490000-0x0000000000496000-memory.dmp

Filesize
24KB

Download
memory/3304-23-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3304-17-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download