bdc2b5e733911686422748efd1b7936c751c71d525ce4088f0f6c76a78ac4c9c

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
30/04/2024, 02:38

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General

Target

2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe
Size

64KB
MD5

495a8a86db3a247a603629c8c403afb7
SHA1

25d7b57bdd9550723781b18713724086f9058f99
SHA256

bdc2b5e733911686422748efd1b7936c751c71d525ce4088f0f6c76a78ac4c9c
SHA512

03267a4551379d396b03f696b2dcf58e888352a5b2da87e2bf497873197bd9a012084354d16492b2c699ab68f2a074e0d4ea08d945e52aa3bc5b42f186f24b5e
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAod:1nK6a+qdOOtEvwDpjj

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4152-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023b15-13.dat	CryptoLocker_rule2
behavioral2/memory/4152-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4568-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4152-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0009000000023b15-13.dat	CryptoLocker_set1
behavioral2/memory/4152-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/4568-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4152-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0009000000023b15-13.dat	UPX
behavioral2/memory/4152-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/4568-25-0x0000000000500000-0x000000000050F311-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-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4568	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4152-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0009000000023b15-13.dat	upx
behavioral2/memory/4152-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/4568-25-0x0000000000500000-0x000000000050F311-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 4152 wrote to memory of 4568	4152	2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe	83
PID 4152 wrote to memory of 4568	4152	2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe	83
PID 4152 wrote to memory of 4568	4152	2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-30_495a8a86db3a247a603629c8c403afb7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4152
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4568

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
64KB

MD5
2430e2c472b4f158bcd8d6c8a2983ab2

SHA1
153b45f32932263a8618ce5a0b20d746645ad3d1

SHA256
870ef8e0f67bbcc55a5677b85dc9fd7bb89912cc2377d8df0ba09dbe34c47095

SHA512
26bfd3d390c90bd696af56aa895c38c3163a0d9ba3e6c37fb6c8675046e4a09fb14ddbb059f770c35fa831296796cf0b738988250d65cddc8de90f2886b051cc

Download Submit
memory/4152-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4152-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4152-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4152-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4152-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4568-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download