stealc | b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269

General

Target

b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe
Size

1.9MB
MD5

92ed84d1d3c6d2ac327b1db563a312d4
SHA1

56515f040716a32e4de45994c02ee30e61bde8d4
SHA256

b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269
SHA512

1368f89fc6d654ce48ae7294a5c01aeb8d9746df14d9b50e8652e1466c0675bcf58262cd4fe9e14a12eda4410679abb5278e023df5f221dcfcb107ff6b24c933
SSDEEP

24576:n/eC7bzaXi7m0wJu0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P0wMS4cdR/z4+UVi4e9Crn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/4028-1-0x00000000040B0000-0x0000000004216000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2908-34-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
2908	kat4AA5.tmp

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4028 set thread context of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4AA5.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2908	kat4AA5.tmp
2908	kat4AA5.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76
PID 4028 wrote to memory of 2908	4028	b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe	76

C:\Users\Admin\AppData\Local\Temp\b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe
"C:\Users\Admin\AppData\Local\Temp\b249088b9ed63a8f18fb55fc567742d3dd4422d62c989b2b34c1f65987134269.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Users\Admin\AppData\Local\Temp\kat4AA5.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4AA5.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4AA5.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2908-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-19-0x0000000019360000-0x00000000195BF000-memory.dmp

Filesize
2.4MB

Download
memory/2908-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2908-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4028-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/4028-1-0x00000000040B0000-0x0000000004216000-memory.dmp

Filesize
1.4MB

Download
memory/4028-9-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads