4699bdf5776c78c60680b2cb595501322439ae6c74ac686123bfe37ad593c98b

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 03:32

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General

Target

2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe
Size

68KB
MD5

1e291b1247b602e98c69bde0ac82c291
SHA1

d64863e6d699ddcbaf0a1fb908a888da78278086
SHA256

4699bdf5776c78c60680b2cb595501322439ae6c74ac686123bfe37ad593c98b
SHA512

dca366a046c8caad58e2f1cf60942df374ed27d6c170c1f667c63130fb3871827138c11bc8742d6c65698579d3c31e26bde139350918d32d38190cf10601333c
SSDEEP

1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQApkB:78SEOtEvwDpjWYvQd2Pa

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2404-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000a0000000233c0-13.dat	CryptoLocker_rule2
behavioral2/memory/2404-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4480-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2404-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000a0000000233c0-13.dat	CryptoLocker_set1
behavioral2/memory/2404-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4480-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2404-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000a0000000233c0-13.dat	UPX
behavioral2/memory/2404-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4480-27-0x0000000000500000-0x000000000050F000-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4480	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2404-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000a0000000233c0-13.dat	upx
behavioral2/memory/2404-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4480-27-0x0000000000500000-0x000000000050F000-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 2404 wrote to memory of 4480	2404	2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe	82
PID 2404 wrote to memory of 4480	2404	2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe	82
PID 2404 wrote to memory of 4480	2404	2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_1e291b1247b602e98c69bde0ac82c291_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4480

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
69KB

MD5
8586cb08857c72c245c3a0214eb3831f

SHA1
bc66c1105d38237e3a60aefb8744b1938c66fc00

SHA256
887fbf8a483d84ead68970201aec040b72e282a1e5d3b79b11906d4917b338f1

SHA512
513a9d0487ba755b373c46e73878f87e35efdf18a98d32689ee39c87c32c813ec346d473bc8f9cdb7f027baff834135d53b7b81ba2dffc9164efcfa378512f4b

Download Submit
memory/2404-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2404-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2404-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2404-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/2404-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4480-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4480-26-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/4480-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download