87039e9b5ec2952d927908bc8e3f7650c2bb8a81fb5b26ef50008eb830706d3f

Analysis

max time kernel
149s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/01/2024, 23:24

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General

Target

2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe
Size

67KB
MD5

affb53d8e401a78d53bdf7768b646278
SHA1

7c43269fa50e56f355d234d39604f969cdd4bbcf
SHA256

87039e9b5ec2952d927908bc8e3f7650c2bb8a81fb5b26ef50008eb830706d3f
SHA512

f2c18f50f7b86e14cec9b18081830996e5b711361c2f44b0ac1379b01b0b5651b0a1c531ffaf97d82bf09a8eca49e16f675558cd28fbf691583ee4f592c52e3b
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUs:DW60sllyWOtEvwDpjwF85u

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_rule2
behavioral2/memory/4836-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000022480-13.dat	CryptoLocker_set1
behavioral2/memory/4836-17-0x0000000000500000-0x000000000050B000-memory.dmp	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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3536	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 4836 wrote to memory of 3536	4836	2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe	88
PID 4836 wrote to memory of 3536	4836	2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe	88
PID 4836 wrote to memory of 3536	4836	2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_affb53d8e401a78d53bdf7768b646278_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4836
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3536

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
68KB

MD5
c573ba19ffdda2304e70b69dcbc83a1c

SHA1
7850fa400d2a158de8c40925d76a26ff9865e47f

SHA256
d1d7abba3f746488b3a8383b6ec932abeea3bb4f73fec334a43033b46eff16fa

SHA512
0fc673c127241461c9a59328113a12bcba6b68d4fa7e60e04b7fd6d62ac8f4e43ff28ad8310cbcf0ce527006d0066efa0bdb804005796f7aeab8849e062aa519

Download Submit
memory/3536-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3536-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4836-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4836-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4836-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4836-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4836-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download