blustealer | c35cd99a9bd4f1a8289d3bc98bf59a57ac7816ec16de668d37cf4ee747ab7c35

General

Target

Comprobante transferencia.xlxs.pdf.exe
Size

172KB
MD5

65ae911b0aff53af557cd58a6c68be64
SHA1

59f789e3d42b06fa875abfd801dbb02425e7f1f7
SHA256

c35cd99a9bd4f1a8289d3bc98bf59a57ac7816ec16de668d37cf4ee747ab7c35
SHA512

ab715188fb6eb7730355945763e731087f53351f7662d24befe5ebe34373cadeb7481e9a96632b236401986bac917eda235325ac9729f44385f9455b6113d493
SSDEEP

3072:2KFHC+bcA0wmv5GZopfShP5yEsuTSj6deVoL+Lb4bnrzoyKOHm:jYs0wmv5yotShP5ygej6deGrfdG

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/1532-72-0x0000000000200000-0x000000000021A000-memory.dmp	family_stormkitty
behavioral1/memory/1532-73-0x0000000000214F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1532-75-0x0000000000200000-0x000000000021A000-memory.dmp	family_stormkitty
behavioral1/memory/1532-77-0x0000000000200000-0x000000000021A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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 1100 set thread context of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1360 set thread context of 1532	1360	aspnet_compiler.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	1532	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1360	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1100 wrote to memory of 1360	1100	Comprobante transferencia.xlxs.pdf.exe	28
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29
PID 1360 wrote to memory of 1532	1360	aspnet_compiler.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Comprobante transferencia.xlxs.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Comprobante transferencia.xlxs.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1360
- - 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:1532

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/1100-54-0x0000000001340000-0x000000000136E000-memory.dmp

Filesize
184KB

Download
memory/1100-55-0x00000000002F0000-0x00000000002F6000-memory.dmp

Filesize
24KB

Download
memory/1100-56-0x0000000000410000-0x000000000041C000-memory.dmp

Filesize
48KB

Download
memory/1100-57-0x0000000000420000-0x0000000000428000-memory.dmp

Filesize
32KB

Download
memory/1360-79-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-63-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-69-0x00000000763F1000-0x00000000763F3000-memory.dmp

Filesize
8KB

Download
memory/1360-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1360-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1532-72-0x0000000000200000-0x000000000021A000-memory.dmp

Filesize
104KB

Download
memory/1532-75-0x0000000000200000-0x000000000021A000-memory.dmp

Filesize
104KB

Download
memory/1532-77-0x0000000000200000-0x000000000021A000-memory.dmp

Filesize
104KB

Download
memory/1532-70-0x0000000000200000-0x000000000021A000-memory.dmp

Filesize
104KB

Download

Analysis

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