5e4427f1766a4c63591a525209b96d2b90f35eb89ae0219294e80abb5eaebdfb

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 07:23

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General

Target

2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe
Size

21KB
MD5

0ac90893d4ff2edf787adb7733b0b9c1
SHA1

a0f1ed6a3ac8b159f0d1cf53213ef1050df9dcb3
SHA256

5e4427f1766a4c63591a525209b96d2b90f35eb89ae0219294e80abb5eaebdfb
SHA512

07d8dc607591b07254733b149843ae8fc3f1d9d536528c8617a3d8743ad7fbe78a9b738504f26bebd66aef475a44556e463b10c8b7f574bd559d7d795b4a99a0
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp8:bVCPwFRo6CpwXFXSqQXfju

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/332-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023037-13.dat	CryptoLocker_rule2
behavioral2/memory/332-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1100-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/332-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0009000000023037-13.dat	UPX
behavioral2/memory/332-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/1100-26-0x0000000008000000-0x000000000800E000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1100	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/332-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0009000000023037-13.dat	upx
behavioral2/memory/332-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/1100-26-0x0000000008000000-0x000000000800E000-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 332 wrote to memory of 1100	332	2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe	85
PID 332 wrote to memory of 1100	332	2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe	85
PID 332 wrote to memory of 1100	332	2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_0ac90893d4ff2edf787adb7733b0b9c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:332
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:1100

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
21KB

MD5
551314981afd26ce7545e67872a7bba4

SHA1
8520e0795d29c11b504cda9bb5bda0cefb63ae0d

SHA256
3590fa9fd00aada6648bdc4aa0ccafc105eeff3fdfb8fdfaa55f5d3b19dcfb57

SHA512
7d3c258b012c73e9aab78451e8c65362be32e5327d5ba35f530deddacd97d10508cb8fd7ab43e7241bbda39ab347317938eb569bb4287dd3bbd82c0cb0f23e27

Download Submit
memory/332-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/332-1-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/332-2-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/332-3-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/332-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1100-19-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1100-20-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1100-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download