stealc | c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f

Analysis

max time kernel
146s
max time network
156s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 14:21

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General

Target

c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe
Size

2.2MB
MD5

7fdeebc27ee7d9001539eb01b7acad90
SHA1

9a8ee45b3ffb9498c6e01f74a6be78408fc76fb9
SHA256

c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f
SHA512

ebe250caad0e8465f0887b812da3d156e5e132a0e8ec33552f7e7699e42d3e41042e1092d1b1a7e9328a7cb678273f8b5076930cab61b521883a1899859dd631
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXL/U2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPo21tuuIeNHYGY0LzjsJxK

Score

10^/10

stealc vidar discovery spyware 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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3132-2-0x0000000002C90000-0x0000000002DA3000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4124-36-0x0000000000400000-0x0000000000648000-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

Processes:

kat3AC7.tmp

pid process

4124 kat3AC7.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

Processes:

c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe

description pid process target process

PID 3132 set thread context of 4124 3132 c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe kat3AC7.tmp

pid	process
4124	kat3AC7.tmp

description	pid	process	target process
PID 3132 set thread context of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp

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:

kat3AC7.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat3AC7.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3AC7.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat3AC7.tmp

pid process

4124 kat3AC7.tmp
4124 kat3AC7.tmp
4124 kat3AC7.tmp
4124 kat3AC7.tmp

pid	process
4124	kat3AC7.tmp
4124	kat3AC7.tmp
4124	kat3AC7.tmp
4124	kat3AC7.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe

description	pid	process	target process
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp
PID 3132 wrote to memory of 4124	3132	c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe	kat3AC7.tmp

C:\Users\Admin\AppData\Local\Temp\c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe
"C:\Users\Admin\AppData\Local\Temp\c3b4cb26e5eca137fffece3c7132f503d9b42081d09304102cf57c0842337f4f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3132

C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4124

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3132-0-0x00000000025E0000-0x00000000025E1000-memory.dmp

Filesize
4KB

Download
memory/3132-2-0x0000000002C90000-0x0000000002DA3000-memory.dmp

Filesize
1.1MB

Download
memory/3132-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/4124-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-27-0x000000002D140000-0x000000002D39F000-memory.dmp

Filesize
2.4MB

Download
memory/4124-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4124-36-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download