49fca5a78d3e946abce36499df180095a42cc936ca8db4071215ea2aeff7bde0

Analysis

max time kernel
142s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 19:57

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General

Target

2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
Size

56KB
MD5

50eb50a2a424d69e6907106db7887468
SHA1

6aea148c392727694cb48c9dfb8c45ee7e7298d6
SHA256

49fca5a78d3e946abce36499df180095a42cc936ca8db4071215ea2aeff7bde0
SHA512

c9cf325964d6d41cdfd41b845ef67cd59351879599585f18f420a4713a876db6394edd1ade89dccb874d5ed9a57c254ec69ff250fec63cd1dbb42b44b301b681
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpymZuK:zj+soPSMOtEvwDpj4yeK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_rule2
behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\misid.exe	CryptoLocker_set1
behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\misid.exe	UPX
behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exemisid.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

Processes:

misid.exe

pid process

1604 misid.exe

pid	process
1604	misid.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\misid.exe	upx
behavioral2/memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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

Processes:

2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe

description	pid	process	target process
PID 2604 wrote to memory of 1604	2604	2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe	misid.exe
PID 2604 wrote to memory of 1604	2604	2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe	misid.exe
PID 2604 wrote to memory of 1604	2604	2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe	misid.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_50eb50a2a424d69e6907106db7887468_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2604

C:\Users\Admin\AppData\Local\Temp\misid.exe
"C:\Users\Admin\AppData\Local\Temp\misid.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:1604

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\misid.exe
Filesize
56KB

MD5
b2daf8534e4be8eed3cb0aba1582ed9c

SHA1
30c28f757ff1b37cb0248efd0718c30328c5fd18

SHA256
74271e58bfdd62d5e7cd6e3cf520a1e8681819a49ed2548a78768c279dbe007e

SHA512
d544dd8c367c4daf8cc0d6246d4fff738245aea1a69e2c4678036d8b64559cf7f17a2e1c6dddcf9b7e8efce9400b89cfd483ff70a002042296bfbe6e0767aee1

Download Submit
memory/1604-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1604-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1604-54-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2604-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2604-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2604-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2604-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2604-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download