819455bddb490fbacdb831dbf60819fa706bf8b17ebf5a221485523972d78076

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28/05/2024, 00:51

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General

Target

2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe
Size

24KB
MD5

a08dd1097036b66cbcfc7cf01dfa01c1
SHA1

58cbe3064c025c973f9056b68e65853f26989a6a
SHA256

819455bddb490fbacdb831dbf60819fa706bf8b17ebf5a221485523972d78076
SHA512

daafd630a3ce7f66bf7cb813ae5abe0fff65f8474a1326b8e7e35ffcbf822666e2d6e2532453bdbb6382c209f865b7df0ff88fb94bb00e63fa5baaad6433ffd0
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2v:bVCPwFRo6CpwXFXSqQXfjAsJU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5100-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023298-13.dat	CryptoLocker_rule2
behavioral2/memory/5100-18-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1440-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5100-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0006000000023298-13.dat	UPX
behavioral2/memory/5100-18-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1440-26-0x0000000008000000-0x000000000800E000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1440	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5100-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0006000000023298-13.dat	upx
behavioral2/memory/5100-18-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1440-26-0x0000000008000000-0x000000000800E000-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 5100 wrote to memory of 1440	5100	2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe	82
PID 5100 wrote to memory of 1440	5100	2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe	82
PID 5100 wrote to memory of 1440	5100	2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_a08dd1097036b66cbcfc7cf01dfa01c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1440

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\hasfj.exe

Filesize
24KB

MD5
799436f6de5b734cd015cc5170bf0d93

SHA1
ad5ab7739767e06f95f61354a0560eea58c06338

SHA256
55cb4959f6d3294696c40bcd439343adc7c04d065b4cdf1a34c04d9a32c88e0b

SHA512
36e88817207d5688e2fe85a9f236cfae6f05ea07603b3ef6658733762beda7dae8c4fec97cbd5da77001eb4271f882aff0dde51191d90bfc8b10b234a207d0fc

Download Submit
memory/1440-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5100-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/5100-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/5100-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/5100-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/5100-18-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download