stealc | b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586

General

Target

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe
Size

4.0MB
MD5

04976c9e6aa8481402075c917916a83e
SHA1

4079a6cca10bbdaccd13401f30a1a95276db7eb9
SHA256

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586
SHA512

4ea2b676678d883457e434bbeee3cd3f88f0eb3c80013551459077c064b5f6103dd1b51882cf4c56f52d5369d1c4e00d0f3cd1db006c804fcdb7333292e7402a
SSDEEP

49152:u70LoELHB0Bw+PQQEB8Im+XkOAwuzIeIEJgHLXIizBMBaPKVY:uI0ELm/keIECrXId4aY

Score

10^/10

stealc vidar stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://88.99.127.107

https://t.me/memve4erin

https://steamcommunity.com/profiles/76561199699680841

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/2680-69-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2680-67-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2680-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2680-73-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2680-74-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2680-76-0x0000000000400000-0x0000000000648000-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

Detects Windows executables referencing non-Windows User-Agents 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2680-69-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2680-67-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2680-72-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2680-73-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2680-74-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2680-76-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2680-69-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2680-67-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2680-72-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2680-73-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2680-74-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral2/memory/2680-76-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2680-69-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2680-67-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2680-72-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2680-73-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2680-74-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral2/memory/2680-76-0x0000000000400000-0x0000000000648000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Suspicious use of SetThreadContext 1 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

description	pid	process	target process
PID 2444 set thread context of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe

Checks processor information in registry 2 TTPs 1 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 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

1032 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

2680 MSBuild.exe
2680 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

description pid process

Token: SeDebugPrivilege 2444 b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

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

pid	process
1032	timeout.exe

pid	process
2680	MSBuild.exe
2680	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exeMSBuild.execmd.exe

description	pid	process	target process
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2444 wrote to memory of 2680	2444	b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe	MSBuild.exe
PID 2680 wrote to memory of 528	2680	MSBuild.exe	cmd.exe
PID 2680 wrote to memory of 528	2680	MSBuild.exe	cmd.exe
PID 2680 wrote to memory of 528	2680	MSBuild.exe	cmd.exe
PID 528 wrote to memory of 1032	528	cmd.exe	timeout.exe
PID 528 wrote to memory of 1032	528	cmd.exe	timeout.exe
PID 528 wrote to memory of 1032	528	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe
"C:\Users\Admin\AppData\Local\Temp\b26b1074a9b97f7f8be564b70f50ee965df6b8773695ba25d72c2638d3c90586.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2444

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:2680

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\IECGHJKKJDHI" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:1032

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2444-24-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-52-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-2-0x00000000053F0000-0x000000000548C000-memory.dmp

Filesize
624KB

Download
memory/2444-46-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-3-0x0000000005490000-0x00000000055D4000-memory.dmp

Filesize
1.3MB

Download
memory/2444-5-0x00000000055D0000-0x00000000056CA000-memory.dmp

Filesize
1000KB

Download
memory/2444-6-0x00000000051E0000-0x00000000051FC000-memory.dmp

Filesize
112KB

Download
memory/2444-12-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-66-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-65-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-44-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-7-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-1-0x00000000004B0000-0x00000000008AC000-memory.dmp

Filesize
4.0MB

Download
memory/2444-71-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2444-62-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-60-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-58-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-43-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-54-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-10-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-50-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-48-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-4-0x00000000745B0000-0x0000000074D60000-memory.dmp

Filesize
7.7MB

Download
memory/2444-8-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-56-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-40-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-38-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-36-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-34-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-32-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-30-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-28-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-26-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-0-0x00000000745BE000-0x00000000745BF000-memory.dmp

Filesize
4KB

Download
memory/2444-22-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-20-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-18-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-17-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2444-14-0x00000000051E0000-0x00000000051F5000-memory.dmp

Filesize
84KB

Download
memory/2680-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2680-74-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2680-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2680-73-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2680-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2680-76-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads