stealc | f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef

General

Target

f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe
Size

1.9MB
MD5

29a8a65500e0ccee4d1f17535760491a
SHA1

9965ba378679f5a9037316bf52a9fcee35d9b264
SHA256

f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef
SHA512

35854f89f53f095e3318552fcec2b2985aca2baa2f438ff9354e636767e6fca93f428cb6a30d2e730ace8dbd6e26df4bed34beb58a61f730a0bdcfe6f7e250db
SSDEEP

24576:n/eC7bzaXi7m0oJu0LXolGLbJnR/z4+EbVbw2qug4ctOlQLernWO:nGYz0P0oMS4cdR/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
behavioral1/memory/864-1-0x0000000004110000-0x0000000004276000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-31-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3112-32-0x0000000000400000-0x0000000000648000-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
3112	katB65.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 864 set thread context of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89

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	katB65.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3112	katB65.tmp
3112	katB65.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89
PID 864 wrote to memory of 3112	864	f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe	89

C:\Users\Admin\AppData\Local\Temp\f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe
"C:\Users\Admin\AppData\Local\Temp\f1b32217c15bfd16622fd088eff75e18aebc71e87b1400c57dc3a13e0e1057ef.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:864
- C:\Users\Admin\AppData\Local\Temp\katB65.tmp
  C:\Users\Admin\AppData\Local\Temp\katB65.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3112

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1040 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:3520

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\katB65.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/864-0-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download
memory/864-1-0x0000000004110000-0x0000000004276000-memory.dmp

Filesize
1.4MB

Download
memory/864-8-0x0000000000400000-0x00000000005DF000-memory.dmp

Filesize
1.9MB

Download
memory/3112-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-16-0x000000001B760000-0x000000001B9BF000-memory.dmp

Filesize
2.4MB

Download
memory/3112-31-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3112-32-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads