90f80d11e0e949c31c66737988452b72bce97cc0831d3e72dc08fa027fdf02a6

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
15-05-2024 18:38

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General

Target

2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe
Size

69KB
MD5

b57694fd914540ebccd2ce0d6ec85cba
SHA1

729977c90dfef9c077ac7435a3a86338123c095c
SHA256

90f80d11e0e949c31c66737988452b72bce97cc0831d3e72dc08fa027fdf02a6
SHA512

c42090b1b6806bf5ea81bf8f3891d4875f1f9caa19530901075dea966f6ab5ded925f71f4252a5045f1e1fb129b7f7f268dfd17b1dd318e3b31956f696a9e9cc
SSDEEP

1536:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAez:78SEOtEvwDpjWYvQd2Pi

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000233ce-13.dat	CryptoLocker_rule2
behavioral2/memory/4688-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1784-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00090000000233ce-13.dat	CryptoLocker_set1
behavioral2/memory/4688-18-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1784-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x00090000000233ce-13.dat	UPX
behavioral2/memory/4688-18-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1784-27-0x0000000000500000-0x000000000050F000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1784	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4688-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x00090000000233ce-13.dat	upx
behavioral2/memory/4688-18-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1784-27-0x0000000000500000-0x000000000050F000-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 4688 wrote to memory of 1784	4688	2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe	83
PID 4688 wrote to memory of 1784	4688	2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe	83
PID 4688 wrote to memory of 1784	4688	2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-15_b57694fd914540ebccd2ce0d6ec85cba_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4688
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1784

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
69KB

MD5
f66a8c02f86da1ff04094e236c727ab7

SHA1
55e97fec5c9961632baba78e2ee1e66edec871f3

SHA256
241b4747db7b7083f8d2f97595506df11f534d0c5b87cf9903f4ffd7e7191d80

SHA512
5dcf0fdb2ba34fd731973a363b98052cc487315eddb0e3f250216cd1d861113f6b1396355933b0908cb1c20dc94b46f59f0189bf55543c2fa00e3858d0217461

Download Submit
memory/1784-20-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/1784-26-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/1784-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4688-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4688-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4688-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4688-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4688-18-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download