dfa52d50f924ad72a95f674e549f59b0d4a3c0e9af487853a51693b2f474a69a

Analysis

max time kernel
146s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
18/04/2024, 01:36

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General

Target

2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe
Size

88KB
MD5

72f3158e0f485938bcb8854cd3138672
SHA1

7b96d6a2d726c46007b8501bc31fa8adcc5641e6
SHA256

dfa52d50f924ad72a95f674e549f59b0d4a3c0e9af487853a51693b2f474a69a
SHA512

ca65ab6118fa66de996edefb18c252452896de8f98bbb090d81e16ae2d771e6b9557061dcfe04fb74257e6d8bddbd62ef66aeff7341b8061ab7107a71b0f2deb
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAK:n6a+1SEOtEvwDpjYYvQd2PB

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000233da-13.dat	CryptoLocker_rule2
behavioral2/memory/2488-23-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00070000000233da-13.dat	CryptoLocker_set1
behavioral2/memory/2488-23-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000233da-13.dat	UPX
behavioral2/memory/2488-23-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4432-26-0x0000000000500000-0x0000000000510000-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-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\International\Geo\Nation	2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4432	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00070000000233da-13.dat	upx
behavioral2/memory/2488-23-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4432-26-0x0000000000500000-0x0000000000510000-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 2488 wrote to memory of 4432	2488	2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe	89
PID 2488 wrote to memory of 4432	2488	2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe	89
PID 2488 wrote to memory of 4432	2488	2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_72f3158e0f485938bcb8854cd3138672_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4432

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
88KB

MD5
bedaa1a400da61798832d753a37b6f5a

SHA1
374ccf63625fbf2b4485e5b711621fa093354d51

SHA256
48ae873336315df0f857198c8dbba95b6cace06d26850b3fd0e3bd03aef804ca

SHA512
04eb52e6ee47621bfa80fe8f936dabe48623d7aa600f4b050074cbcc73087bb6721b9c194c713e4ce63c40dbd13685b4dc2f64a4b319075c63d568f93f7d6428

Download Submit
memory/2488-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2488-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2488-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2488-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/2488-23-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4432-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4432-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4432-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download