stealc | aa97786e9adf76f6defc26e6dae534e5c274cac67b85e53b1386e5aae31d5ed9

General

Target

file.exe
Size

4.0MB
MD5

5788c3ef67c6f46dcb70081d218a12c2
SHA1

2ac0a7389a51ad40bb75644a57ce4ba54a0265b1
SHA256

aa97786e9adf76f6defc26e6dae534e5c274cac67b85e53b1386e5aae31d5ed9
SHA512

eab43f8b8c993f08f524c9f6008b4534b0a1dca955ff84baf3bce71fa2bcaad873a0bb5376ebbd77140efe3136c3cb74a4c41fe6fded8ac0d50347f20dd5321e
SSDEEP

49152:7QCRvUGbevNhRghAcQGKr44XNFRDcCvxzJyLmxEULS1S496+lxB:7QCRvUGsBgmcQHr44XKCvJJyLmxTi/9l

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/2640-68-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2640-66-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2640-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2640-74-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2640-75-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2640-77-0x0000000000400000-0x0000000000648000-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:

file.exe

description pid process target process

PID 3564 set thread context of 2640 3564 file.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

4988 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

file.exeMSBuild.exe

pid process

3564 file.exe
3564 file.exe
2640 MSBuild.exe
2640 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

file.exe

description pid process

Token: SeDebugPrivilege 3564 file.exe

description	pid	process	target process
PID 3564 set thread context of 2640	3564	file.exe	MSBuild.exe

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

pid	process
4988	timeout.exe

pid	process
3564	file.exe
3564	file.exe
2640	MSBuild.exe
2640	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	3564	file.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

file.exeMSBuild.execmd.exe

description	pid	process	target process
PID 3564 wrote to memory of 748	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 748	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 748	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 3564 wrote to memory of 2640	3564	file.exe	MSBuild.exe
PID 2640 wrote to memory of 992	2640	MSBuild.exe	cmd.exe
PID 2640 wrote to memory of 992	2640	MSBuild.exe	cmd.exe
PID 2640 wrote to memory of 992	2640	MSBuild.exe	cmd.exe
PID 992 wrote to memory of 4988	992	cmd.exe	timeout.exe
PID 992 wrote to memory of 4988	992	cmd.exe	timeout.exe
PID 992 wrote to memory of 4988	992	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3564

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
PID:748

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:2640

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\EHJDGCBGDBKJ" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:992

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4988

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/2640-68-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-75-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-74-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2640-66-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3564-49-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-43-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-39-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-65-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-7-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-70-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3564-5-0x0000000005830000-0x000000000584C000-memory.dmp

Filesize
112KB

Download
memory/3564-63-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-62-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-59-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-3-0x0000000005AA0000-0x0000000005BC2000-memory.dmp

Filesize
1.1MB

Download
memory/3564-71-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3564-57-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-55-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-53-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-51-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-0-0x00000000744AE000-0x00000000744AF000-memory.dmp

Filesize
4KB

Download
memory/3564-48-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-46-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-41-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-37-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-35-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-33-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-31-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-30-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-27-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-25-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-23-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-21-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-19-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-17-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-15-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-13-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-11-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-9-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-6-0x0000000005830000-0x0000000005845000-memory.dmp

Filesize
84KB

Download
memory/3564-73-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3564-4-0x00000000744A0000-0x0000000074C50000-memory.dmp

Filesize
7.7MB

Download
memory/3564-2-0x0000000005950000-0x00000000059EC000-memory.dmp

Filesize
624KB

Download
memory/3564-1-0x0000000000B20000-0x0000000000F1C000-memory.dmp

Filesize
4.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads