08413d9278f0de5c60a7ccce971dc5fb1d33575552dbba20dc9c60e80b0e79e1

Analysis

max time kernel
134s
max time network
152s
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, 13:45

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General

Target

2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe
Size

62KB
MD5

3f4a9261c1f57dfe7ff4190e0eaae062
SHA1

db771fb7fb006cc85a222e211f752d784c3b27b0
SHA256

08413d9278f0de5c60a7ccce971dc5fb1d33575552dbba20dc9c60e80b0e79e1
SHA512

61de85160e215b5a98c132e8859672474dbc1f11033a8fdb71a2bd3b365042b70a4f14f1055a5736bbe5866316238838003773e6ba69ae2603086884c89ac816
SSDEEP

768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5aK:zj+soPSMOtEvwDpj4kpmeLmD

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2436-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023180-13.dat	CryptoLocker_rule2
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4960-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4960-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2436-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023180-13.dat	CryptoLocker_set1
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4960-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4960-55-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2436-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023180-13.dat	UPX
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4960-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4960-55-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	misid.exe

Executes dropped EXE 1 IoCs

pid	Process
4960	misid.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2436-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023180-13.dat	upx
behavioral2/memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4960-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4960-55-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 2436 wrote to memory of 4960	2436	2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe	85
PID 2436 wrote to memory of 4960	2436	2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe	85
PID 2436 wrote to memory of 4960	2436	2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_3f4a9261c1f57dfe7ff4190e0eaae062_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2436
- 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:4960

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\misid.exe

Filesize
62KB

MD5
6859ba967ff48d78842f1fa075e761f7

SHA1
d8af862654ee1a071aa34d7e47e7d9fca136161e

SHA256
5d1041a8fb63f9c82c9e8f2c7483cff15d67257893dfde73f4e375c48937a5ce

SHA512
25d5c538ba1e7b29a0bf5617cc7898c940175e5140e71aad05c5330546593872f8a739c60615a31ac29236b17725863cfb84e7dc1ff5ced2cc09b9b31aa43687

Download Submit
memory/2436-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2436-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2436-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2436-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2436-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4960-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4960-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4960-20-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4960-55-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download