stealc | 87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e

General

Target

87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe
Size

2.2MB
MD5

9818ece207fa1eab7be1759e55706f0b
SHA1

3709efb668d404ff3e471d91f2beb2a1db0a4ef3
SHA256

87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e
SHA512

6c293db5d1738eb6f560e89d581f8243083044095e295c302549b3fa7ca85b1b811d2c06821c49d225280daea58f93f995030c4ac1e2feeed3e0e59c1b615d45
SSDEEP

49152:lAgY7fvVtbBaxmcqMTBemQKQl+bH4JbjzzEBETT29YMST:llY7nTMBTBemQKQl+bYxzIBA6uMST

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

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

resource	yara_rule
behavioral2/memory/2096-1-0x00000000040F0000-0x0000000004200000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2248-41-0x0000000000400000-0x0000000000648000-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
2248	kat66F7.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 2096 set thread context of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat66F7.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat66F7.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2248	kat66F7.tmp
2248	kat66F7.tmp
2248	kat66F7.tmp
2248	kat66F7.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81
PID 2096 wrote to memory of 2248	2096	87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe	81

C:\Users\Admin\AppData\Local\Temp\87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe
"C:\Users\Admin\AppData\Local\Temp\87c76b5e77bf00e73d34c2bc161bd3c3ea1f14d1c72cc3c9c4522cb252b2e11e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2096
- C:\Users\Admin\AppData\Local\Temp\kat66F7.tmp
  C:\Users\Admin\AppData\Local\Temp\kat66F7.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2248

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat66F7.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2096-0-0x0000000000A00000-0x0000000000A01000-memory.dmp

Filesize
4KB

Download
memory/2096-1-0x00000000040F0000-0x0000000004200000-memory.dmp

Filesize
1.1MB

Download
memory/2096-10-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download
memory/2248-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-25-0x0000000022650000-0x00000000228AF000-memory.dmp

Filesize
2.4MB

Download
memory/2248-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2248-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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