ytstealer | 21c2f78a2ba5891c4dbdc1b50283844c7720ecd3f1187fb9269015524cad2da2

Analysis

max time kernel
163s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
31-08-2022 10:16

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General

Target

start(3).exe
Size

4.0MB
MD5

b09ec6718a34a70a182f3412b89f6777
SHA1

e730645db18339897aeddb4f21ce662911e03444
SHA256

21c2f78a2ba5891c4dbdc1b50283844c7720ecd3f1187fb9269015524cad2da2
SHA512

5d0f9eb9fcfe8a5d6c42db552d35411116ec0b405e747537a75fd50fb6e9f1d1fc1bf95c169c5ef7c2d217b7cc5d647a6ed36f130e0382a71f919c5e09ec7881
SSDEEP

98304:GbhyCQjQZtnVQvM1ozGPpf4jhxJ6J+wVj9h6QzJwH8Kk:OkQZtVFmjFjkj9hBwH8V

Score

10^/10

ytstealer spyware stealer upx

Malware Config

Signatures

YTStealer
YTStealer is a malware designed to steal YouTube authentication cookies.
stealer ytstealer

YTStealer payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1428-135-0x0000000000420000-0x00000000011F9000-memory.dmp	family_ytstealer

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1428-132-0x0000000000420000-0x00000000011F9000-memory.dmp	upx
behavioral2/memory/1428-135-0x0000000000420000-0x00000000011F9000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

start(3).exe

pid process

1428 start(3).exe
1428 start(3).exe
1428 start(3).exe
1428 start(3).exe

pid	process
1428	start(3).exe
1428	start(3).exe
1428	start(3).exe
1428	start(3).exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

start(3).execmd.exe

description	pid	process	target process
PID 1428 wrote to memory of 3916	1428	start(3).exe	cmd.exe
PID 1428 wrote to memory of 3916	1428	start(3).exe	cmd.exe
PID 3916 wrote to memory of 3904	3916	cmd.exe	choice.exe
PID 3916 wrote to memory of 3904	3916	cmd.exe	choice.exe

C:\Users\Admin\AppData\Local\Temp\start(3).exe
"C:\Users\Admin\AppData\Local\Temp\start(3).exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1428
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /C choice /C Y /N /D Y /T 0 &Del C:\Users\Admin\AppData\Local\Temp\start(3).exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3916
- - C:\Windows\system32\choice.exe
    choice /C Y /N /D Y /T 0
    3⤵
    PID:3904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1428-132-0x0000000000420000-0x00000000011F9000-memory.dmp

Filesize
13.8MB

Download
memory/1428-135-0x0000000000420000-0x00000000011F9000-memory.dmp

Filesize
13.8MB

Download
memory/3904-134-0x0000000000000000-mapping.dmp

Download
memory/3916-133-0x0000000000000000-mapping.dmp

Download