d7248603b06cfd1c69c766df18fd3895dc91589d8f18552dcf636adef717c0fd

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 22:33

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General

Target

2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe
Size

40KB
MD5

e57216989980b9573bfda8652357a9c1
SHA1

3607d770cbf03e78d98c30cbb159355a009acfdb
SHA256

d7248603b06cfd1c69c766df18fd3895dc91589d8f18552dcf636adef717c0fd
SHA512

ddbe1598fcf01d107abd6c0a7dba55e91eab000c16d0a8d169610fa4ed7526fd484d394faf7b54cad095abedb80257292811bba7ece47ab7541edcf467bd4b2d
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBv:qDdFJy3QMOtEvwDpjjWMl7TdZ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3568-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3396-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3568-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3396-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3568-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3396-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3396 asih.exe

pid	process
3396	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3568-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3396-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe

description	pid	process	target process
PID 3568 wrote to memory of 3396	3568	2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe	asih.exe
PID 3568 wrote to memory of 3396	3568	2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe	asih.exe
PID 3568 wrote to memory of 3396	3568	2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_e57216989980b9573bfda8652357a9c1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3568
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3396

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
40KB

MD5
cfaa760a1251222d508eac41fdb3b61a

SHA1
a576887dfeb1841e39d78bcab66b1db76172a452

SHA256
1a70a8b064196c89830e2e9e1049e3548925e2cca849449fe5ce79538dae4c2e

SHA512
76d57485c78f3c45ad199c3e33f2d7987222d70983529a68950602a7bf2f611e28f0ba62dfcafeb004f8f1792d831a2540fe03daab0edf8d04a33b8f7f55f5a0

Download Submit
memory/3396-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3396-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3396-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3568-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3568-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3568-8-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/3568-2-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3568-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download