7700174663b067b8d1e073f7ba65dda2e0a13a44405377c987ff0a2d73c7b43f

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
31/05/2024, 18:28

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General

Target

2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe
Size

40KB
MD5

5450712359fa4664632dc92798942e02
SHA1

d8a3db06a40a47cd14b60438eb9b301975f09269
SHA256

7700174663b067b8d1e073f7ba65dda2e0a13a44405377c987ff0a2d73c7b43f
SHA512

6ee8f0963a4e08fd165e539b5762aeff42df0acd2cb319e1b5ec9f149690ff8d8abccb8ab3f82812f9d20a419bf5bdf9bc1460e8b4890e1d497729d5561653bb
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBc4s:qDdFJy3QMOtEvwDpjjWMl7TdS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002327c-13.dat	CryptoLocker_rule2
behavioral2/memory/2108-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3396-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3396-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002327c-13.dat	CryptoLocker_set1
behavioral2/memory/2108-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3396-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3396-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000600000002327c-13.dat	UPX
behavioral2/memory/2108-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3396-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3396-28-0x0000000000500000-0x0000000000510000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3396	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000600000002327c-13.dat	upx
behavioral2/memory/2108-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3396-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3396-28-0x0000000000500000-0x0000000000510000-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 2108 wrote to memory of 3396	2108	2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe	82
PID 2108 wrote to memory of 3396	2108	2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe	82
PID 2108 wrote to memory of 3396	2108	2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-31_5450712359fa4664632dc92798942e02_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2108
- 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
b98fa1e02a52458047c23db88e597aeb

SHA1
1a37deb4af7caf2276da6acb2264f09b30985cb8

SHA256
3301cb90bfc5628f37501a7d78c5c03c494182a01704256bf2cc042dc4bd9302

SHA512
00c8ceee85ba4a1b055ecc4de0a62d6774578de933942be5a37f2bbe74dd810490665f86b87a3abc99d49b1622de5be5fd326ad4068cb9baaca8f5970f921524

Download Submit
memory/2108-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2108-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2108-2-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/2108-9-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2108-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3396-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3396-21-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3396-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3396-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download