stealc | 27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6

General

Target

27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe
Size

2.0MB
MD5

520b1f26bacee0337d665f94764cf822
SHA1

daf8b72ea5ad4b999057b4e2a6ee2f46932770ee
SHA256

27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6
SHA512

fde5290586e158491e0dce617fe6b65a510f5e40485d3a821a8f48cd0b8439a4ffcc09c4be76e32e0d9c98e7987f8452dc5d3bc152a4620443b6b259db17fa53
SSDEEP

49152:IFno/jfIJtTF+TxMoxc1TU+j+dAzGkiT:IFno/jgtIuoITsdZT

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral1/memory/4356-1-0x0000000004070000-0x00000000041B9000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3628-36-0x0000000000400000-0x0000000000646000-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

pid	Process
3628	kat467F.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 4356 set thread context of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83

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	kat467F.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3628	kat467F.tmp
3628	kat467F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83
PID 4356 wrote to memory of 3628	4356	27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe	83

C:\Users\Admin\AppData\Local\Temp\27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe
"C:\Users\Admin\AppData\Local\Temp\27b09d28b14450afa2eb62e69693e76798baa117b62050051c92d1c7adad2bb6.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\AppData\Local\Temp\kat467F.tmp
  C:\Users\Admin\AppData\Local\Temp\kat467F.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3628

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\kat467F.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3628-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-20-0x000000001B810000-0x000000001BA6F000-memory.dmp

Filesize
2.4MB

Download
memory/3628-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3628-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4356-0-0x00000000007A0000-0x00000000007A1000-memory.dmp

Filesize
4KB

Download
memory/4356-1-0x0000000004070000-0x00000000041B9000-memory.dmp

Filesize
1.3MB

Download
memory/4356-10-0x0000000000400000-0x0000000000602000-memory.dmp

Filesize
2.0MB

Download

Analysis

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