a38eb16c106eb7fe42337c3f883c41a1d0e152931f94ab2306ad93d1c3bb6ba0

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
25-02-2024 06:43

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General

Target

2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe
Size

104KB
MD5

ee21fde179d00d0e84e69b3b0fe89a7e
SHA1

4190039fbd1bc4d0877fce6ce51e3b1f16babff8
SHA256

a38eb16c106eb7fe42337c3f883c41a1d0e152931f94ab2306ad93d1c3bb6ba0
SHA512

a7d1ee87d892d8f74e7c9655cbc99070e4d7390dddbe428b9fddd1fe4bf6b2f0f577432261212068aef2f832df379576c3f471737487c1310a61905e3050e833
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gks9:1nK6a+qdOOtEvwDpj9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00080000000231f5-13.dat	CryptoLocker_rule2
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00080000000231f5-13.dat	CryptoLocker_set1
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x00080000000231f5-13.dat	UPX
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1790404759-2178872477-2616469472-1000\Control Panel\International\Geo\Nation	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5060	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x00080000000231f5-13.dat	upx
behavioral2/memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/5060-26-0x0000000000500000-0x000000000050F311-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 3668 wrote to memory of 5060	3668	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	86
PID 3668 wrote to memory of 5060	3668	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	86
PID 3668 wrote to memory of 5060	3668	2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-25_ee21fde179d00d0e84e69b3b0fe89a7e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5060

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
104KB

MD5
16f050c93e04351916df5cfb735deaf7

SHA1
6c52bba6bd43762f9287ff611f579aea7557c5d2

SHA256
148782b0e6a703332c6c74c717256f473e25f68a36cd6aa30daad848382d59c6

SHA512
5ff105fac5497ad2a115920ea5c2a3431f18b5034ab84cf098f843387c41a52d6850f294046f64599523836ff22875aad8bf9124f90abb155492413fdf69671a

Download Submit
memory/3668-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3668-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3668-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3668-3-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/3668-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5060-20-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5060-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5060-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download