5182fa0a03200feb8988f65643411fa9090d069fd20d90467c67d8bf51879050

Analysis

max time kernel
148s
max time network
151s
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 21:59

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General

Target

2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe
Size

64KB
MD5

f17a9a6399cc7c249e6468ab74e40db9
SHA1

94f39e193a4a537fbecea273113b65c13b8ffa56
SHA256

5182fa0a03200feb8988f65643411fa9090d069fd20d90467c67d8bf51879050
SHA512

9da1619f9b6a9e4e43a3d325902aef1a36199e136e3df3908b41045c7edc68719ed087702bdcd9390fa161405b225d882a10bf94c614ce6fdc2de0838a056074
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiV:BbdDmjr+OtEvwDpjM8M

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3572-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3572-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3572-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3572 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3572	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe

description	pid	process	target process
PID 4016 wrote to memory of 3572	4016	2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe	asih.exe
PID 4016 wrote to memory of 3572	4016	2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe	asih.exe
PID 4016 wrote to memory of 3572	4016	2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_f17a9a6399cc7c249e6468ab74e40db9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3572

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
64KB

MD5
708a81df38332503b66515dddf6b7af7

SHA1
faf04de5d2e2566b541187e820ffe03fdd142c2a

SHA256
0d044173b560113705ec088aff302a0c269bc58125ffed79a56895d50de67a65

SHA512
c3450c985e8bf631b452c13cff106445f3a0bf9d2de6c11855f842f0d160fc966e00097de9fbfbc0c818c08b8c023402dec1ce43cb74d87ab4af68eec9012e9b

Download Submit
memory/3572-19-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/3572-25-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/3572-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4016-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4016-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4016-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4016-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4016-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download