stealc | 5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb

General

Target

5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe
Size

1.7MB
MD5

5f562e20a35a725b987701460b2ec879
SHA1

2160ba7a8ce1a536fc25237575a8b286277757d4
SHA256

5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb
SHA512

678500a9259a81433e0c035b1b95cf0c3d0d060666ec0db91cee164ca9f7ac1da15471a0a09ed8e93d2e4031534017785709c4b6932e8542dd1764b54289b77f
SSDEEP

24576:UBqWKKYMPEVFYzMPkYHXANYksiZArxliP4OTomFu5Xxth9:UyM8VF8W5aYRi2lpYu5XxZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/bu77un

https://steamcommunity.com/profiles/76561199730044335

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.1) Gecko/20100101 Firefox/128.1

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/4828-2-0x0000000002AA0000-0x0000000002BE3000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2812-36-0x0000000000400000-0x0000000000648000-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

pid	Process
2812	kat77DF.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 4828 set thread context of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80

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	kat77DF.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat77DF.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2812	kat77DF.tmp
2812	kat77DF.tmp
2812	kat77DF.tmp
2812	kat77DF.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80
PID 4828 wrote to memory of 2812	4828	5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe	80

C:\Users\Admin\AppData\Local\Temp\5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe
"C:\Users\Admin\AppData\Local\Temp\5c9d55fecfc459948867058d9428dced7460dc5b423bf5c5741f208a39ef8fdb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Users\Admin\AppData\Local\Temp\kat77DF.tmp
  C:\Users\Admin\AppData\Local\Temp\kat77DF.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2812

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\kat77DF.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2812-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-27-0x000000002D140000-0x000000002D39F000-memory.dmp

Filesize
2.4MB

Download
memory/2812-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2812-36-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4828-0-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download
memory/4828-2-0x0000000002AA0000-0x0000000002BE3000-memory.dmp

Filesize
1.3MB

Download
memory/4828-9-0x0000000000400000-0x00000000005C5000-memory.dmp

Filesize
1.8MB

Download

Analysis

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