stealc | e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2

General

Target

file.exe
Size

3.0MB
MD5

097a014e9066d6a4dd30e057e18eb511
SHA1

2baa37cdc9b69e4083fdf468240cbacb1f2851ae
SHA256

e4877fdceffd87cec166b266532a431e0d5e7644d950ce9566d2f14bc18be5e2
SHA512

3409f75f0d073146410ebf31f487626e0c5fc01abb962f56b673256e72981f3e4f5c063e6690feeff1b2937bd14b453c38823242c9dee9e607fe63888d9ad627
SSDEEP

49152:HzcK4Uk57r6mnw8fqFEIawGt2jlobG+FVSA7tffhpZ4F/3:HzvMWmnZSVawGtjHFVS8ffDZ4J

Score

10^/10

stealc vidar zgrat rat spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 12 IoCs

stealer

resource	yara_rule
behavioral2/memory/3036-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-24-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-27-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-28-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-45-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-46-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-62-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-63-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-74-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-75-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3036-76-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Detect ZGRat V1 1 IoCs

resource	yara_rule
behavioral2/memory/4204-1-0x0000000000380000-0x0000000000682000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat
Downloads MZ/PE file

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/memory/4204-1-0x0000000000380000-0x0000000000682000-memory.dmp	net_reactor

Loads dropped DLL 1 IoCs

pid	Process
4204	file.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4204 set thread context of 3036	4204	file.exe	89

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2044	4204	WerFault.exe	81

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	MsBuild.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
5016	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3036	MsBuild.exe
3036	MsBuild.exe
3036	MsBuild.exe
3036	MsBuild.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 4204 wrote to memory of 3036	4204	file.exe	89
PID 3036 wrote to memory of 4364	3036	MsBuild.exe	97
PID 3036 wrote to memory of 4364	3036	MsBuild.exe	97
PID 3036 wrote to memory of 4364	3036	MsBuild.exe	97
PID 4364 wrote to memory of 5016	4364	cmd.exe	99
PID 4364 wrote to memory of 5016	4364	cmd.exe	99
PID 4364 wrote to memory of 5016	4364	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4204
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe
  2⤵
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3036
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe" & rd /s /q "C:\ProgramData\CBAFIDAECBGC" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4364
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:5016
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4204 -s 764
  2⤵
  - Program crash
  PID:2044

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4204 -ip 4204
1⤵
PID:4248

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Protect544cd51a.dll

Filesize
742KB

MD5
544cd51a596619b78e9b54b70088307d

SHA1
4769ddd2dbc1dc44b758964ed0bd231b85880b65

SHA256
dfce2d4d06de6452998b3c5b2dc33eaa6db2bd37810d04e3d02dc931887cfddd

SHA512
f56d8b81022bb132d40aa78596da39b5c212d13b84b5c7d2c576bbf403924f1d22e750de3b09d1be30aea359f1b72c5043b19685fc9bf06d8040bfee16b17719

Download Submit
memory/3036-62-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-75-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-74-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-63-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-76-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-46-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-45-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-30-0x000000001B880000-0x000000001BADF000-memory.dmp

Filesize
2.4MB

Download
memory/3036-28-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-27-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-24-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3036-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4204-11-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-14-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-20-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-23-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-16-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-26-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-15-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-22-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-13-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-12-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-0-0x000000007471E000-0x000000007471F000-memory.dmp

Filesize
4KB

Download
memory/4204-10-0x00000000050F0000-0x0000000005100000-memory.dmp

Filesize
64KB

Download
memory/4204-4-0x0000000005110000-0x00000000052A2000-memory.dmp

Filesize
1.6MB

Download
memory/4204-3-0x0000000074710000-0x0000000074EC0000-memory.dmp

Filesize
7.7MB

Download
memory/4204-2-0x0000000005020000-0x00000000050BC000-memory.dmp

Filesize
624KB

Download
memory/4204-1-0x0000000000380000-0x0000000000682000-memory.dmp

Filesize
3.0MB

Download

Analysis

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