stealc | a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
29-06-2024 17:00

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe
Size

4.3MB
MD5

67cef2b94174d0883a8e8b9ad9c217c7
SHA1

d674a6454b03d5190ea685112e68a6604eabfc39
SHA256

a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7
SHA512

bd335514641c23f96063c92783bcc2e607c7765705aafa2e742b631c102c08704b1bc77ba61dce7f2267abd5e0e4a30653a50179f86689ecf348f5eb0057ea3c
SSDEEP

49152:WgMCMqzvDxEHJKquC8nlPCx0jdt8not+bgZV014po/8QNT9Fr1:wGdlbInoM0bBO5H

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 6 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1308-69-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1308-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1308-67-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1308-74-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1308-75-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1308-77-0x0000000000400000-0x0000000000648000-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:

a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe

description pid process target process

PID 1940 set thread context of 1308 1940 a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe MSBuild.exe

description	pid	process	target process
PID 1940 set thread context of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.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

872 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

MSBuild.exe

pid process

1308 MSBuild.exe
1308 MSBuild.exe
1308 MSBuild.exe
1308 MSBuild.exe
1308 MSBuild.exe
1308 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe

description pid process

Token: SeDebugPrivilege 1940 a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe

pid	process
872	timeout.exe

pid	process
1308	MSBuild.exe
1308	MSBuild.exe
1308	MSBuild.exe
1308	MSBuild.exe
1308	MSBuild.exe
1308	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exeMSBuild.execmd.exe

description	pid	process	target process
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1940 wrote to memory of 1308	1940	a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe	MSBuild.exe
PID 1308 wrote to memory of 5092	1308	MSBuild.exe	cmd.exe
PID 1308 wrote to memory of 5092	1308	MSBuild.exe	cmd.exe
PID 1308 wrote to memory of 5092	1308	MSBuild.exe	cmd.exe
PID 5092 wrote to memory of 872	5092	cmd.exe	timeout.exe
PID 5092 wrote to memory of 872	5092	cmd.exe	timeout.exe
PID 5092 wrote to memory of 872	5092	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe
"C:\Users\Admin\AppData\Local\Temp\a928fc7218f8b916a6c386f500634dc2f31772ed5da82173b257ccf4371bdee7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1940

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:1308

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\GDGHJEHJJDAA" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:5092

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:872

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

Loading Replay Monitor...

Downloads

memory/1308-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1308-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1308-75-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1308-74-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1308-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1308-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1940-44-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-38-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-54-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-66-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-63-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-6-0x00000000059C0000-0x00000000059DC000-memory.dmp

Filesize
112KB

Download
memory/1940-71-0x0000000074620000-0x0000000074DD1000-memory.dmp

Filesize
7.7MB

Download
memory/1940-5-0x0000000005C20000-0x0000000005D2C000-memory.dmp

Filesize
1.0MB

Download
memory/1940-4-0x0000000074620000-0x0000000074DD1000-memory.dmp

Filesize
7.7MB

Download
memory/1940-60-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-58-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-56-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-53-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-50-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-48-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-46-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-0-0x000000007462E000-0x000000007462F000-memory.dmp

Filesize
4KB

Download
memory/1940-42-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-40-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-22-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-36-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-34-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-32-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-30-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-28-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-26-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-24-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-21-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-18-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-16-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-14-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-12-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-10-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-64-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-8-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-7-0x00000000059C0000-0x00000000059D5000-memory.dmp

Filesize
84KB

Download
memory/1940-73-0x0000000074620000-0x0000000074DD1000-memory.dmp

Filesize
7.7MB

Download
memory/1940-3-0x0000000005910000-0x000000000591A000-memory.dmp

Filesize
40KB

Download
memory/1940-2-0x0000000005A00000-0x0000000005A9C000-memory.dmp

Filesize
624KB

Download
memory/1940-1-0x0000000000AA0000-0x0000000000EF2000-memory.dmp

Filesize
4.3MB

Download