7e1b7a3f69200aedb2c9a0857b78c1eb1ee9bc4a327a5a2b5a10cd1333f15c9a

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:24

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General

Target

2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe
Size

64KB
MD5

051a539f25cb3c71cdec032fc7a93683
SHA1

8d6133f907a29eaab3faafc35ad5431c2907d4c1
SHA256

7e1b7a3f69200aedb2c9a0857b78c1eb1ee9bc4a327a5a2b5a10cd1333f15c9a
SHA512

9650222b390b3d47ef28a3132626a9999c05c35ed69bd8e26575173848f333a0ab95fb5ae439df08ebb102d8fc8ba4c09b3f45b46d84871e168e7f4e04f4e2d8
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsiP:BbdDmjr+OtEvwDpjM8q

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5064-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5064-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/5064-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3608-27-0x0000000000500000-0x0000000000510000-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:

2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3608 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3608	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe

description	pid	process	target process
PID 5064 wrote to memory of 3608	5064	2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe	asih.exe
PID 5064 wrote to memory of 3608	5064	2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe	asih.exe
PID 5064 wrote to memory of 3608	5064	2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_051a539f25cb3c71cdec032fc7a93683_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5064

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3608

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
64KB

MD5
394f5b44ab196ecf6ea42f51401d241e

SHA1
292cbe7346ff132d5338ad4c414225bd764e814b

SHA256
9c3e5e9ceef30fdefcd9eb4b55ca73659adf739581f2baba146788c2d3a34613

SHA512
f56bf3cf5d5cf7153343cde804626387aa6153c1a5e09dc463465e4dafdb2a74fea65a0c4efe4276ca2daffa4e420b295043d0615ca71b799874bb2cfc839528

Download Submit
memory/3608-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3608-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download
memory/3608-26-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/3608-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5064-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5064-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5064-2-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/5064-9-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5064-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download