5ab7357c4795e67cfae0f1730289516db928ae088f302dbae451cc350d2ce92f

Analysis

max time kernel
153s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2024 05:34

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General

Target

2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe
Size

93KB
MD5

5c9b685d69d879f88b61bd736c709e36
SHA1

19c956e2ab51fb2ec989b0830a15fb2f05297ebc
SHA256

5ab7357c4795e67cfae0f1730289516db928ae088f302dbae451cc350d2ce92f
SHA512

9223cafca378950a079c31de450d8199f52a5469a397a8577057bb648e02fcb8e045b058cc5ca87fbf50cc96d1582cb6ff821caaf180e0903cb5839629d1bfe8
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01EEj:AnBdOOtEvwDpj6zT

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4852-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0006000000023148-13.dat	CryptoLocker_rule2
behavioral2/memory/4852-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1940-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4852-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0006000000023148-13.dat	CryptoLocker_set1
behavioral2/memory/4852-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1940-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4852-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x0006000000023148-13.dat	UPX
behavioral2/memory/4852-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1940-26-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1940	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4852-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x0006000000023148-13.dat	upx
behavioral2/memory/4852-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1940-26-0x0000000000500000-0x000000000050F000-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

description	pid	Process	procid_target
PID 4852 wrote to memory of 1940	4852	2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe	84
PID 4852 wrote to memory of 1940	4852	2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe	84
PID 4852 wrote to memory of 1940	4852	2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-29_5c9b685d69d879f88b61bd736c709e36_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1940

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
93KB

MD5
3c2bf30ec3bafa3b3c340c467e06dc90

SHA1
66cc4980e7372cc4d1d1f40660a9b561b644d49f

SHA256
23dabbbc4fcd9adf7591b5a2b3528035243f68bfce99855c1a68148d3f53881a

SHA512
b5f2d269d2ad9edc2820a25f987c2bce455f43bf61d2a862fc93c62efefefefbd58ab5033246579b2e0dce0e4b7f0330304f0984634773be95a83edaafb8d6db

Download Submit
memory/1940-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1940-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1940-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4852-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4852-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4852-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/4852-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/4852-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download