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 spyware 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 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/2428-77-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2428-560-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
Suspicious use of SetThreadContext 1 IoCs

Processes:

file.exe

description pid process target process

PID 1684 set thread context of 2428 1684 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

2340 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

2428 MSBuild.exe
2428 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

file.exe

description pid process

Token: SeDebugPrivilege 1684 file.exe

description	pid	process	target process
PID 1684 set thread context of 2428	1684	file.exe	MSBuild.exe

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

pid	process
2340	timeout.exe

pid	process
2428	MSBuild.exe
2428	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1684	file.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

file.exeMSBuild.execmd.exe

description	pid	process	target process
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 1684 wrote to memory of 2428	1684	file.exe	MSBuild.exe
PID 2428 wrote to memory of 1564	2428	MSBuild.exe	cmd.exe
PID 2428 wrote to memory of 1564	2428	MSBuild.exe	cmd.exe
PID 2428 wrote to memory of 1564	2428	MSBuild.exe	cmd.exe
PID 2428 wrote to memory of 1564	2428	MSBuild.exe	cmd.exe
PID 1564 wrote to memory of 2340	1564	cmd.exe	timeout.exe
PID 1564 wrote to memory of 2340	1564	cmd.exe	timeout.exe
PID 1564 wrote to memory of 2340	1564	cmd.exe	timeout.exe
PID 1564 wrote to memory of 2340	1564	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:1684

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:2428

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\AKKFHDAKECFH" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1564

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2340

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarB736.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1684-46-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-10-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-42-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-14-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-5-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-6-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-8-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-45-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-12-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-32-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-64-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-62-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-0-0x0000000074D9E000-0x0000000074D9F000-memory.dmp

Filesize
4KB

Download
memory/1684-58-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-56-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-65-0x0000000074D90000-0x000000007547E000-memory.dmp

Filesize
6.9MB

Download
memory/1684-54-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-52-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-50-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-49-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-60-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-3-0x0000000004EA0000-0x0000000004FC2000-memory.dmp

Filesize
1.1MB

Download
memory/1684-4-0x0000000000440000-0x000000000045C000-memory.dmp

Filesize
112KB

Download
memory/1684-41-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-38-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-36-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-34-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-30-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-28-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-26-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-24-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-23-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-21-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-18-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-17-0x0000000000440000-0x0000000000455000-memory.dmp

Filesize
84KB

Download
memory/1684-1-0x0000000000870000-0x0000000000C6C000-memory.dmp

Filesize
4.0MB

Download
memory/1684-2-0x0000000074D90000-0x000000007547E000-memory.dmp

Filesize
6.9MB

Download
memory/1684-78-0x0000000074D90000-0x000000007547E000-memory.dmp

Filesize
6.9MB

Download
memory/2428-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2428-68-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2428-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2428-560-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads