252b8a048c2e8eb55cd45508f6590268c9f80ad31c02ff196921342cc1a4a050

Analysis

max time kernel
140s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
17/02/2024, 20:29

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General

Target

2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe
Size

105KB
MD5

3f9ce0f7eed411f42287d08034158096
SHA1

9ea59872dacd88bcc4c6de3026a1a4d3e434bb13
SHA256

252b8a048c2e8eb55cd45508f6590268c9f80ad31c02ff196921342cc1a4a050
SHA512

aff216928caed84cf4ce97c36b7ee06046c6951f34b31a969613170b157f7d7ab68d9a1b7c4cc8ec6ab4dd9a9b2619c767ae59cb5c3f9d8f7d9718f213f7d8cc
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GkszfiM:1nK6a+qdOOtEvwDpjR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002313d-13.dat	CryptoLocker_rule2
behavioral2/memory/952-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3596-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002313d-13.dat	CryptoLocker_set1
behavioral2/memory/952-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3596-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000002313d-13.dat	UPX
behavioral2/memory/952-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3596-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3596	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000002313d-13.dat	upx
behavioral2/memory/952-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3596-26-0x0000000000500000-0x000000000050F311-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 952 wrote to memory of 3596	952	2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe	84
PID 952 wrote to memory of 3596	952	2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe	84
PID 952 wrote to memory of 3596	952	2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-17_3f9ce0f7eed411f42287d08034158096_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3596

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
105KB

MD5
1cde8229618cd44a8f12546acef17bb8

SHA1
679f1e625bd8f261d2db6ea7a7e83e4b9e97b4b1

SHA256
d84bdcd970fd3d151d0d28e7fe6f05869c7a7f8ac8ba4ac7cd78baf4ebdb7d2b

SHA512
d8a1516b95686c00ecb2e76e9ae8392539e901bf0477ae616fc36427d2c561421e3f92051489600e838b4bf1591559e6cbeedd35edc7651815b13f821505e4bf

Download Submit
memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/952-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/952-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/952-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/952-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3596-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/3596-24-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/3596-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download