stealc | 9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745

General

Target

9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe
Size

2.0MB
MD5

990054abc654b10cec1a99ba9874df82
SHA1

885a67444f073f4a82543e711bbd36205be71ffc
SHA256

9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745
SHA512

e0a58a87f9594762b979e35054288df973c315441fe2e1eb53180d6a2e107db7702b0590064b39cfb47f167a20f7829a21c46277d15d3215d1e91d1e2dbe7939
SSDEEP

49152:7QzHt472DJJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtHtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1352-2-0x00000000041C0000-0x0000000004309000-memory.dmp	family_vidar_v7
behavioral2/memory/328-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/328-36-0x0000000000400000-0x0000000000646000-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:

kat687E.tmp

pid process

328 kat687E.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

pid	process
328	kat687E.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe

description	pid	process	target process
PID 1352 set thread context of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp

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

Processes:

kat687E.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat687E.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat687E.tmp

pid process

328 kat687E.tmp
328 kat687E.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat687E.tmp

pid	process
328	kat687E.tmp
328	kat687E.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe

description	pid	process	target process
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp
PID 1352 wrote to memory of 328	1352	9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe	kat687E.tmp

C:\Users\Admin\AppData\Local\Temp\9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe
"C:\Users\Admin\AppData\Local\Temp\9a2ba0aa8544324f42c1da9ba9e42311ce1b0b0ea0b9bc0b09e8e2202ca63745.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1352
- C:\Users\Admin\AppData\Local\Temp\kat687E.tmp
  C:\Users\Admin\AppData\Local\Temp\kat687E.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:328

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\kat687E.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/328-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-20-0x000000001B7E0000-0x000000001BA3F000-memory.dmp

Filesize
2.4MB

Download
memory/328-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/328-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1352-2-0x00000000041C0000-0x0000000004309000-memory.dmp

Filesize
1.3MB

Download
memory/1352-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/1352-0-0x0000000002480000-0x0000000002481000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads