26e4e9ba1f578e4a482d9e83bb57f70f1a82ef68fd88575b06f536201fa6be2c

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07/06/2024, 04:14

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General

Target

2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe
Size

79KB
MD5

bda33124d6375c36b1abdebf6f70bd66
SHA1

9066dbbe0106d194357e4e5badad91e5d0eafece
SHA256

26e4e9ba1f578e4a482d9e83bb57f70f1a82ef68fd88575b06f536201fa6be2c
SHA512

b9565a678d771cc568e297d21ee043f606e6905ed4ec2e23efed9d8f78fc706a1d21f45695734f4aa535a97eb3dc95cd1046ed058890a9074f4e6df6cb19910d
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxnLO:T6a+rdOOtEvwDpjNtHPp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/1344-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3600-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1344-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3600-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023298-13.dat	CryptoLocker_set1
behavioral2/memory/1344-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3600-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1344-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3600-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023298-13.dat	UPX
behavioral2/memory/1344-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3600-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1344-27-0x0000000000500000-0x0000000000510000-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-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1344	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3600-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023298-13.dat	upx
behavioral2/memory/1344-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3600-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1344-27-0x0000000000500000-0x0000000000510000-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 3600 wrote to memory of 1344	3600	2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe	82
PID 3600 wrote to memory of 1344	3600	2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe	82
PID 3600 wrote to memory of 1344	3600	2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-07_bda33124d6375c36b1abdebf6f70bd66_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3600
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1344

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
79KB

MD5
fcdd8ff3ad0bde50d8c5a6504cbe1858

SHA1
0a0aa9e04da98de30e0ec1e855013ffdd02efe9c

SHA256
3dc62b38003170034255071eeb170eb82f3cc4147744d7d04916be869fb6c3b4

SHA512
49c667ea972c45774d29f3e8c8b48e4f372dfc6c730d9e9f047ba28c31133c92b17970c09ec25eed4aeb35ee08d540df4427c1efe1c4d751f5d5ac91c8d017e8

Download Submit
memory/1344-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1344-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1344-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1344-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3600-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3600-1-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3600-2-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3600-9-0x0000000000730000-0x0000000000736000-memory.dmp

Filesize
24KB

Download
memory/3600-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download