a563b927cd625b585fad9c7f93edd2f6d93f09f1ca5d3fce0f3171490af5aa89

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
19-02-2024 09:52

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General

Target

2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe
Size

69KB
MD5

b58187cc03b22004984cb92225e6d3e6
SHA1

7b9ae0047112b30b99c428b8b0edfdd2f05d5a0e
SHA256

a563b927cd625b585fad9c7f93edd2f6d93f09f1ca5d3fce0f3171490af5aa89
SHA512

e9f90923a9d623c3ce39c3f2ab126a2ff047f88bd7a6cce3b6f28c56f4ef64fc258b0680fa9984d269448a3b1e7f5075208df051101c5e41943de387eec1343c
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUP:DW60sllyWOtEvwDpjwF85h

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000230f9-13.dat	CryptoLocker_rule2
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3624-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a0000000230f9-13.dat	CryptoLocker_set1
behavioral2/memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3624-18-0x0000000000500000-0x000000000050B000-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-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation	2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3624	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 4004 wrote to memory of 3624	4004	2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe	85
PID 4004 wrote to memory of 3624	4004	2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe	85
PID 4004 wrote to memory of 3624	4004	2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_b58187cc03b22004984cb92225e6d3e6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4004
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3624

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
69KB

MD5
a3e0c6b044a5a672b8acd6e425d5e99f

SHA1
2392a89ad5710093d693717fd69936c48549fa88

SHA256
fc7c77a101f67ab900207f9ec0464050bcd35c5e60228b8606e7349fbd096f19

SHA512
06d7b76f503474cdef7d46f5f8c2f44c69a8fc812322c0187c784e3032fd1a4f270de3231f038df494d35562248ee3f7947baeba701665434210e32692c1fa42

Download Submit
memory/3624-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3624-20-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3624-23-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4004-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4004-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4004-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4004-3-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4004-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download