030265b0ed84d026b8f62d77d83a15df60c1af08fd98674a2888733f1ca4d126

Analysis

max time kernel
149s
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
21-05-2024 19:25

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General

Target

2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe
Size

64KB
MD5

2a8266c5251598d14a57dad9a69d5dee
SHA1

69b63824244c26d5834843ac93f6187a8ea16775
SHA256

030265b0ed84d026b8f62d77d83a15df60c1af08fd98674a2888733f1ca4d126
SHA512

1762d2a703f42718541a8e4a3cae4f9ddd04c3dd6c04e58f1a9bfe7fb36e7177f1987f041f8279306da84a78ee274cbfe5e9d6417414fa9a37e2ed6bab925d83
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiQ:BbdDmjr+OtEvwDpjM8p

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/856-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2796-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/856-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/856-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2796-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/856-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/856-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2796-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/856-28-0x0000000000500000-0x0000000000510000-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:

2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

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

System Information Discovery
T1082

pid	process
856	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe

description	pid	process	target process
PID 2796 wrote to memory of 856	2796	2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe	asih.exe
PID 2796 wrote to memory of 856	2796	2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe	asih.exe
PID 2796 wrote to memory of 856	2796	2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_2a8266c5251598d14a57dad9a69d5dee_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:856

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

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Downloads

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

Filesize
64KB

MD5
554ad6551f70526915c48edf29ecbaca

SHA1
8c5f2f847e1c9597225a1dbb51a3bc56fc575698

SHA256
ffab661a7ce0d5f2cb35980a0d19e62ac9adb4a4b90af2b247c9fec61acafa86

SHA512
ecd47a6ea8150dc5e93263a0d1979bf286a7078e8615f65f615ff811de18617d9e2999f2a6ea525f3009af6729df3260f52f0736e74c49cc85a03078938f7ec8

Download Submit
memory/856-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/856-27-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/856-21-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download
memory/856-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2796-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2796-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2796-2-0x00000000007E0000-0x00000000007E6000-memory.dmp

Filesize
24KB

Download
memory/2796-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2796-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download