76b01463c8f36ecd05dc09c12f3de760b01e5be3a503611521c01d18376d0372

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12/05/2024, 10:43

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General

Target

2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe
Size

63KB
MD5

0b31fae7a8b2aad4bf32b577d04fe890
SHA1

2e9b7545dab81339c66d14e9b8ce2f5426e35878
SHA256

76b01463c8f36ecd05dc09c12f3de760b01e5be3a503611521c01d18376d0372
SHA512

544a83cfb254185713aac1f6bf7c4f54f70087956dbd4aa062d202cf71fbb9aaa4e729557a013de082fea941ed15712db746b8c9817d4bb9eccc6f5c80c5774a
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsi9:BbdDmjr+OtEvwDpjM8U

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000233f7-13.dat	CryptoLocker_rule2
behavioral2/memory/4812-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1760-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4812-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/4812-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1760-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4812-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00080000000233f7-13.dat	UPX
behavioral2/memory/4812-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1760-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4812-28-0x0000000000500000-0x0000000000510000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4812	asih.exe

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 1760 wrote to memory of 4812	1760	2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe	82
PID 1760 wrote to memory of 4812	1760	2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe	82
PID 1760 wrote to memory of 4812	1760	2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-12_0b31fae7a8b2aad4bf32b577d04fe890_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4812

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
63KB

MD5
f89bbceb4b3073981745890b14954a0f

SHA1
a0818f3605b75894ad54e8fd8d911fd22e054565

SHA256
68f998fcba24648cb6780309a1980164e169255c8a86f8be897a972f48773d25

SHA512
32716e6cfff07ed6dd1eb5f0c5d403f92ec4522fb2e794be30ccdda28e0b37490df851beaf22e84372502de72a15636883c44f9068fb26687e4ec113f0887d46

Download Submit
memory/1760-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1760-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1760-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/1760-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1760-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4812-21-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/4812-27-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/4812-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download