52e044ee76ca80466d858b7fabbcaaaf43cfdbe070fc094d409940fc3ea02569

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
23/01/2024, 23:44

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General

Target

2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe
Size

49KB
MD5

68c1d2a53694a0a46329aee5dff51a98
SHA1

0102c3f1d2e04f37e7c3a4d9571f07e4bb1b5403
SHA256

52e044ee76ca80466d858b7fabbcaaaf43cfdbe070fc094d409940fc3ea02569
SHA512

79574f4bc36dc5da10ff91c49359f843d246d7c3cbc2f42a278b8b55a8be956d20e4752fae20893751d7f095c7da9d7ef8df3939b13d5a64b81fba6a5884f2d2
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6ImpyG:BbdDmjr+OtEvwDpjMJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000b000000023166-13.dat	CryptoLocker_rule2
behavioral2/memory/4336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/396-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/4336-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/396-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000b000000023166-13.dat	UPX
behavioral2/memory/4336-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/396-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
396	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 4336 wrote to memory of 396	4336	2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe	85
PID 4336 wrote to memory of 396	4336	2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe	85
PID 4336 wrote to memory of 396	4336	2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-23_68c1d2a53694a0a46329aee5dff51a98_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:396

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
49KB

MD5
3e63bc0afec50a860e6410b5cb9631b8

SHA1
95bba14ee930c7aa129d2a79346232a97cd2caaf

SHA256
f74ba09686dca50eb94992717adbd55e4e650c40ed70ba987741ca1e89e72dfe

SHA512
ce9b1334c3ce2d278b113dde84a7744b64fcf29d26c7c662cbf0c55020a0afdbfb233cbefb58ed6de39f418afd9be1b68023977eb6132510167054812f524485

Download Submit
memory/396-20-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/396-19-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/396-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4336-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4336-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4336-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4336-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download