65fbeef18cb58f8c8d74a141a1edc613b3ff26e817fa374341c843e72040daa8

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
20/02/2024, 09:33

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General

Target

2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe
Size

61KB
MD5

68d8d05902f8eee7f44291ea80cdd968
SHA1

052a8dbdaf7926d0acae8cb991b52ed82341ca68
SHA256

65fbeef18cb58f8c8d74a141a1edc613b3ff26e817fa374341c843e72040daa8
SHA512

1660914226d841f7c790c696c59490508af2d316281cd5531793537e0bf31843798d2ecefafb2a9b55d3942ace2a7b89579c227f6436a5150dc9a571bd22f7f6
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5aFr7YOzR8l/A:z6QFElP6n+gKmddpMOtEvwDpj9aYaFA8

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c0000000231e7-13.dat	CryptoLocker_rule2
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c0000000231e7-13.dat	CryptoLocker_set1
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000c0000000231e7-13.dat	UPX
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2244	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000c0000000231e7-13.dat	upx
behavioral2/memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2244-27-0x0000000000500000-0x0000000000510000-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 2992 wrote to memory of 2244	2992	2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe	86
PID 2992 wrote to memory of 2244	2992	2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe	86
PID 2992 wrote to memory of 2244	2992	2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_68d8d05902f8eee7f44291ea80cdd968_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2244

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
61KB

MD5
94ccff879673c80784473df036f221cd

SHA1
4d14dd32cc7248e6ca413df22b1bd9c09a7ac820

SHA256
4e97dab1f399117dd1743d4dfcbb790b1d7e09fab98352e4d3ee757c20d59ca0

SHA512
0c4a7400fd3fbf1c8d5cdecb8b484c58bfc287abb5a9b16612f4b37c1b36770ef6fb89186920758487a6e7d302d121525fddb4f2bf40d3eee411c2ef333218f2

Download Submit
memory/2244-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2244-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/2244-22-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/2244-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2992-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2992-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2992-3-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/2992-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download