80356d9e8ec37345961b63e2fa6cf1f97db788c42a55461bd1a0693c2d4171df

Analysis

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

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 15:33

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General

Target

2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe
Size

24KB
MD5

3c2dddd80f71b74babbf507a595f6b2c
SHA1

b894802c03fed465edf29bc13f8e4fcb7f00d6b0
SHA256

80356d9e8ec37345961b63e2fa6cf1f97db788c42a55461bd1a0693c2d4171df
SHA512

c26444cf1e55f733e22adf45aeab0b8ab012cff3e369b779bc8e896d548cfd3821ec96f7dcb107b1003a91d744ba8b7128d24d246f77d811a5e49111ae68bb2c
SSDEEP

384:bVCPwFRuFn65arz1ZhdaXFXSCVQTLfjDp6HMJ2a:bVCPwFRo6CpwXFXSqQXfjAsJ1

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1736-0-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023305-13.dat	CryptoLocker_rule2
behavioral2/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4860-26-0x0000000008000000-0x000000000800E000-memory.dmp	CryptoLocker_rule2

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1736-0-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/files/0x0007000000023305-13.dat	UPX
behavioral2/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	UPX
behavioral2/memory/4860-26-0x0000000008000000-0x000000000800E000-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4860	hasfj.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1736-0-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/files/0x0007000000023305-13.dat	upx
behavioral2/memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp	upx
behavioral2/memory/4860-26-0x0000000008000000-0x000000000800E000-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 1736 wrote to memory of 4860	1736	2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe	83
PID 1736 wrote to memory of 4860	1736	2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe	83
PID 1736 wrote to memory of 4860	1736	2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_3c2dddd80f71b74babbf507a595f6b2c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:4860

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
4aaedb1633a9b3b954fb849bbd3b08ed

SHA1
fa3b5349463c03acdc46f3f3240b2fa7db4aff4f

SHA256
dd430672e4a3971a71a8f99f394b35be62aedcd148bff3c43b94901b17c0896c

SHA512
e9f3ba013cf70944471872e7fdc185224668deff785633ce278fe5ce63fb89b79992dd34bdd37a3fc48e084c580c30233d4a116118339930f2a8186e9243882c

Download Submit
memory/1736-0-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/1736-1-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/1736-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1736-9-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/1736-17-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download
memory/4860-19-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/4860-25-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/4860-26-0x0000000008000000-0x000000000800E000-memory.dmp

Filesize
56KB

Download