e418916c32890325e375b16e8d6684edde99fde84db496f59cfdf9d84733aeb2

Analysis

max time kernel
150s
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
27-04-2024 22:33

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General

Target

2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe
Size

87KB
MD5

65458a97bac175a8c43ceb91584c6b83
SHA1

b38e339e3318d60233b40b1acf753da64df9b05d
SHA256

e418916c32890325e375b16e8d6684edde99fde84db496f59cfdf9d84733aeb2
SHA512

e1458321b80be6559afc231adb4667d7b6339602d9724babd1a6f7bf3e0afd2ed72b09317bec2f97fee932c0be0cc26e87def5ccd9f913ec679a25b6e59901bf
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtIODw:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4280-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/536-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4280-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4280-19-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/536-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4280-28-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4280-19-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/536-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4280-28-0x0000000000500000-0x000000000050F000-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:

2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation	2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4280 asih.exe

pid	process
4280	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4280-19-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/536-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4280-28-0x0000000000500000-0x000000000050F000-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:

2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe

description	pid	process	target process
PID 536 wrote to memory of 4280	536	2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe	asih.exe
PID 536 wrote to memory of 4280	536	2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe	asih.exe
PID 536 wrote to memory of 4280	536	2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_65458a97bac175a8c43ceb91584c6b83_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:536

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4280

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
87KB

MD5
f61df05db662684888151375a0cf2382

SHA1
74f26530c1c23a55a9ec4745904d6b19bb7b3b1d

SHA256
688928a0e43c7c76925d234d2be8181268f9eb2b6c3113c10dfb0ea99753f996

SHA512
36da7ca7f7e2bd7d4016f68da14862c107ce7edec594df6ac7e88950211fe7d33b2fe3c5998a03493022764f850603e735d2fbf8f02fdc4563b0e91c933c3d3b

Download Submit
memory/536-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/536-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/536-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/536-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/536-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4280-19-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4280-21-0x0000000000870000-0x0000000000876000-memory.dmp

Filesize
24KB

Download
memory/4280-27-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/4280-28-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download