stealc | 137a7220fb3cbe605b6c74712ad96dcb1bdea1c489e9df159044500ccc23f3c8

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
02-07-2024 10:17

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General

Target

file.exe
Size

4.7MB
MD5

06333e350e25e29677256d9be86e4ee1
SHA1

088fa1f912473c3dfb5ab118b0bc39ec016cf15a
SHA256

137a7220fb3cbe605b6c74712ad96dcb1bdea1c489e9df159044500ccc23f3c8
SHA512

1475fd313ef0ca847eb7921b5bfb017f9b7f9274497df42fe3fa1477f40c6da8723ee0c46fa5c3fac6e9572c47712e1f4412c9460385c8f47117c82befdc329d
SSDEEP

98304:QOHXslY4Scfsu4riBS64FsJHk0rxQyeYSKsXW:PHXslY4j4riIoJHkUeyexrXW

Score

10^/10

stealc vidar stealer

Malware Config

Extracted

Family

vidar

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 3 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/2132-80-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2132-82-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2132-85-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Suspicious use of SetThreadContext 1 IoCs

Processes:

file.exe

description pid process target process

PID 2244 set thread context of 2132 2244 file.exe MSBuild.exe

description	pid	process	target process
PID 2244 set thread context of 2132	2244	file.exe	MSBuild.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MSBuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

300 timeout.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

MSBuild.exe

pid process

2132 MSBuild.exe
2132 MSBuild.exe
2132 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

file.exe

description pid process

Token: SeDebugPrivilege 2244 file.exe

pid	process
300	timeout.exe

pid	process
2132	MSBuild.exe
2132	MSBuild.exe
2132	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2244	file.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

file.exeMSBuild.execmd.exe

description	pid	process	target process
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2244 wrote to memory of 2132	2244	file.exe	MSBuild.exe
PID 2132 wrote to memory of 772	2132	MSBuild.exe	cmd.exe
PID 2132 wrote to memory of 772	2132	MSBuild.exe	cmd.exe
PID 2132 wrote to memory of 772	2132	MSBuild.exe	cmd.exe
PID 2132 wrote to memory of 772	2132	MSBuild.exe	cmd.exe
PID 772 wrote to memory of 300	772	cmd.exe	timeout.exe
PID 772 wrote to memory of 300	772	cmd.exe	timeout.exe
PID 772 wrote to memory of 300	772	cmd.exe	timeout.exe
PID 772 wrote to memory of 300	772	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2132

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe" & rd /s /q "C:\ProgramData\HIIDGCGCBFBA" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:772

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:300

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2132-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2132-85-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2132-82-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2132-80-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2132-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2244-51-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-47-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-7-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-9-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-11-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-13-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-15-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-23-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-25-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-31-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-53-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-65-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-63-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-61-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-59-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-57-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-55-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-0-0x0000000073F1E000-0x0000000073F1F000-memory.dmp

Filesize
4KB

Download
memory/2244-49-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-6-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-45-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-43-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-41-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-40-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-37-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-35-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-33-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-29-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-27-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-21-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-19-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-17-0x0000000000990000-0x00000000009A5000-memory.dmp

Filesize
84KB

Download
memory/2244-66-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2244-5-0x0000000000990000-0x00000000009AC000-memory.dmp

Filesize
112KB

Download
memory/2244-4-0x0000000004C60000-0x0000000004D6A000-memory.dmp

Filesize
1.0MB

Download
memory/2244-3-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2244-81-0x0000000073F10000-0x00000000745FE000-memory.dmp

Filesize
6.9MB

Download
memory/2244-2-0x0000000000580000-0x000000000058A000-memory.dmp

Filesize
40KB

Download
memory/2244-1-0x0000000000FC0000-0x000000000147E000-memory.dmp

Filesize
4.7MB

Download