238ed619242a0e9555acfcb59c9b60ce64675ea9a1a562b141700bbe8a6039b6

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 01:05

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General

Target

2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe
Size

67KB
MD5

f2ee75777dcadfa5cf6e8746f97e7009
SHA1

da655a3dbbeb7de72a0fdf0a41b3bc9a6050778d
SHA256

238ed619242a0e9555acfcb59c9b60ce64675ea9a1a562b141700bbe8a6039b6
SHA512

a2490f4fa27c79022f1fe9f6a8f5a5fea32cd08622bcc48ef39e0e8dc75a798edb4fea9fa6276fc8dc34baf1f5576f4764b2bd6d0e659951d814b76d564ad93a
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1Pa:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/1152-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/1152-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/1152-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5060	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1152-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/1152-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F000-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 1152 wrote to memory of 5060	1152	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	86
PID 1152 wrote to memory of 5060	1152	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	86
PID 1152 wrote to memory of 5060	1152	2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_f2ee75777dcadfa5cf6e8746f97e7009_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5060

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
67KB

MD5
8cc4ac9a43cf99011ca2b6e6489558a5

SHA1
e35b7235800e472021c242324fe30399ac24c016

SHA256
2c1f52387f3bb6f385891562868eba8d87a9a083d63f5082f61d5af1cb20aec9

SHA512
b16c0b1bc4571a63ce1e5d49845ecc0684242fad9354885427f4d8fa0c66fb3e90732f50bff25abd2594e018ee03de03fb0a9a7f595bfa035276d875c1c809ec

Download Submit
memory/1152-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/1152-1-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1152-2-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/1152-3-0x0000000000800000-0x0000000000806000-memory.dmp

Filesize
24KB

Download
memory/1152-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/5060-19-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/5060-25-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/5060-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download