439302202291b9ae3d355f07e2475b94f07e8dc78cd8aaa5ef111d65d0e0fc0d

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 04:23

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General

Target

2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe
Size

38KB
MD5

04ea121bbad6121860560c0eccfb1fdc
SHA1

fc8f5ca692cf2fd2aaa107d1c1566bb682a885a1
SHA256

439302202291b9ae3d355f07e2475b94f07e8dc78cd8aaa5ef111d65d0e0fc0d
SHA512

35841380460d49606eb6c42d07eae0f380518c0d2eade102558003365fac6909918d69a543317a2f26372ec6774857b2de2287d27084a7fcb3018e7aff252e71
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/g:qDdFJy3QMOtEvwDpjjWMl7Tmg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000d000000023b5c-13.dat	CryptoLocker_rule2
behavioral2/memory/744-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2836-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000d000000023b5c-13.dat	CryptoLocker_set1
behavioral2/memory/744-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2836-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000d000000023b5c-13.dat	UPX
behavioral2/memory/744-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2836-26-0x0000000000500000-0x0000000000510000-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-1-5-21-877519540-908060166-1852957295-1000\Control Panel\International\Geo\Nation	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2836	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000d000000023b5c-13.dat	upx
behavioral2/memory/744-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2836-26-0x0000000000500000-0x0000000000510000-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 744 wrote to memory of 2836	744	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	86
PID 744 wrote to memory of 2836	744	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	86
PID 744 wrote to memory of 2836	744	2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-07_04ea121bbad6121860560c0eccfb1fdc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:744
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2836

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
38KB

MD5
32000ad4ef8bd62c6225cdac0406eee8

SHA1
06ef73644ee8742b888368e4cfe97f884f7c9f55

SHA256
39015a5ece91a2831ee0abd6c6284c8613e047684d7d950d2649ba5a29cf6667

SHA512
2c83e00fedbb03e134e3f673930f78e416f2773e77fe287cbf6e961089ea9c43952c75a0b3f63f43bd57eb219e8cd3fa4794a3807032325da22fa8b2dd440550

Download Submit
memory/744-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/744-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/744-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/744-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/744-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2836-25-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/2836-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download