blustealer | 4213052d1b9d7daa7ca2d2e17eded80218602122bd697c72adbb88139d60ce7d

General

Target

Pago pendiente 01-05-2023.exe
Size

892KB
MD5

63c05e9cefd9e149912798971d3bac59
SHA1

2647d01bad450859a0237da0cf8c577afea02f28
SHA256

4213052d1b9d7daa7ca2d2e17eded80218602122bd697c72adbb88139d60ce7d
SHA512

865adeccbbea012401713ef6315b3bed3b1eff6f35d5d2bda984bd3545dd0696bc0b1e272ba94fd92374bad4224962dc779938be07166a7abee78d4752a0ad29
SSDEEP

24576:kudWVLuCLQA+hhbaRVqLHiRMKiyMKrMEC1+lGuCf:/dvYLgHiRMKiyMKbC1+Iu0

Score

10^/10

blustealer stormkitty collection spyware stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5627356603:AAG-Mx0TbSHRRW6IwndrpX3VLZdhd6C-Zac/sendMessage?chat_id=5472437377

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/4152-142-0x0000000000DE0000-0x0000000000DFA000-memory.dmp	family_stormkitty

.NET Reactor proctector 1 IoCs

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

resource	yara_rule
behavioral2/memory/2376-133-0x000001CFFAA10000-0x000001CFFAAF0000-memory.dmp	net_reactor

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

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

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
27	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 4116 set thread context of 4152	4116	caspol.exe	90

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	AppLaunch.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2376	Pago pendiente 01-05-2023.exe
2376	Pago pendiente 01-05-2023.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	Pago pendiente 01-05-2023.exe
Token: SeDebugPrivilege	4152	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4116	caspol.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 3192	2376	Pago pendiente 01-05-2023.exe	88
PID 2376 wrote to memory of 3192	2376	Pago pendiente 01-05-2023.exe	88
PID 2376 wrote to memory of 3192	2376	Pago pendiente 01-05-2023.exe	88
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 2376 wrote to memory of 4116	2376	Pago pendiente 01-05-2023.exe	89
PID 4116 wrote to memory of 4152	4116	caspol.exe	90
PID 4116 wrote to memory of 4152	4116	caspol.exe	90
PID 4116 wrote to memory of 4152	4116	caspol.exe	90
PID 4116 wrote to memory of 4152	4116	caspol.exe	90
PID 4116 wrote to memory of 4152	4116	caspol.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Pago pendiente 01-05-2023.exe
"C:\Users\Admin\AppData\Local\Temp\Pago pendiente 01-05-2023.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
  2⤵
  PID:3192
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4116
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    3⤵
    - Accesses Microsoft Outlook profiles
    - Checks processor information in registry
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:4152

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2376-133-0x000001CFFAA10000-0x000001CFFAAF0000-memory.dmp

Filesize
896KB

Download
memory/2376-134-0x000001CFFCFB0000-0x000001CFFCFC0000-memory.dmp

Filesize
64KB

Download
memory/4116-135-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4116-138-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4116-141-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4116-146-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4152-142-0x0000000000DE0000-0x0000000000DFA000-memory.dmp

Filesize
104KB

Download
memory/4152-143-0x00000000055C0000-0x0000000005626000-memory.dmp

Filesize
408KB

Download
memory/4152-144-0x0000000005F60000-0x0000000005FFC000-memory.dmp

Filesize
624KB

Download

Analysis

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