blustealer | 6ee0666ac13cde16eed1e8ac0fed35481958e386143a319cd8d2473f2b947990

General

Target

Adjunto comprobante de transferencia.exe
Size

144KB
MD5

66cb0bdbdad8b6f432fec880e8f30139
SHA1

e0c501a8d1a6c85a5e534b83a52bc2feda43d6b5
SHA256

3dd0236bc47173fb5b7f6cddd06d5ca36bb00431f3eb0f4e641ac58e9244222e
SHA512

87d69debe9c7cea39fadfb021ab1688cf67d6340b6d0f658d1a42746a18b5e33f583f13312ced950d7da7bd7070db892db1b06756da17622fe2ab7d07601fd36
SSDEEP

3072:VcHL0ZrxLvY9i7NeKw4MNaCJYctsJVJRxODdIjGiC7okl4SA:KQfeBNNNKJV/xs9in

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 4 IoCs

resource	yara_rule
behavioral1/memory/1204-72-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1204-73-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1204-75-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1204-77-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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
3	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1680 set thread context of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1744 set thread context of 1204	1744	Caspol.exe	29

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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1204	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1744	Caspol.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1680 wrote to memory of 1744	1680	Adjunto comprobante de transferencia.exe	28
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29
PID 1744 wrote to memory of 1204	1744	Caspol.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Adjunto comprobante de transferencia.exe
"C:\Users\Admin\AppData\Local\Temp\Adjunto comprobante de transferencia.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680
- 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:1744
- - 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:1204

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/1204-70-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1204-77-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1204-75-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1204-72-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1680-55-0x0000000000640000-0x0000000000666000-memory.dmp

Filesize
152KB

Download
memory/1680-56-0x0000000000670000-0x000000000067C000-memory.dmp

Filesize
48KB

Download
memory/1680-57-0x00000000008F0000-0x00000000008F8000-memory.dmp

Filesize
32KB

Download
memory/1680-54-0x0000000000D90000-0x0000000000DB8000-memory.dmp

Filesize
160KB

Download
memory/1744-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-69-0x0000000075281000-0x0000000075283000-memory.dmp

Filesize
8KB

Download
memory/1744-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-63-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-79-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1744-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download

Analysis

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