blustealer | 626bd933bded92a724263e3b324fbf61b3819b45801cad3a0c7c8e2ec1b69669

General

Target

TRANSFER.exe
Size

644KB
MD5

2291920ad0a80650cba8a6d8e62fca40
SHA1

f2f42f00f1c9337636f9615e0eebd38d86b46f14
SHA256

af0c49cd5e2b41f27d460deb736e47c58009be3fcef52c8720926a0a6bdfc103
SHA512

2c793123997b31f7ae8b94d4ffbb8d8e2fffbbd35da0f8f0b6f5e1c326a71cd0e4431c276ff2fc470f2f77d57343259f6b07036a2c6a0319958416ae53470245
SSDEEP

12288:D+cPxGu+EjNjdUeJ2IZWAtb5xgtk5Atl3vF9uMW9e3fdn:HGzExjOejXxYkKdN9ck1n

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/4832-140-0x0000000000D60000-0x0000000000D7A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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
18	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2284 set thread context of 4496	2284	TRANSFER.exe	89
PID 4496 set thread context of 4832	4496	aspnet_compiler.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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4832	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 2284 wrote to memory of 4496	2284	TRANSFER.exe	89
PID 4496 wrote to memory of 4832	4496	aspnet_compiler.exe	90
PID 4496 wrote to memory of 4832	4496	aspnet_compiler.exe	90
PID 4496 wrote to memory of 4832	4496	aspnet_compiler.exe	90
PID 4496 wrote to memory of 4832	4496	aspnet_compiler.exe	90
PID 4496 wrote to memory of 4832	4496	aspnet_compiler.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\TRANSFER.exe
"C:\Users\Admin\AppData\Local\Temp\TRANSFER.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2284
- 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:4496
- - 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:4832

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/2284-132-0x0000000000360000-0x0000000000406000-memory.dmp

Filesize
664KB

Download
memory/4496-134-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4496-136-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4496-142-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4496-144-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4832-140-0x0000000000D60000-0x0000000000D7A000-memory.dmp

Filesize
104KB

Download
memory/4832-141-0x00000000054D0000-0x0000000005536000-memory.dmp

Filesize
408KB

Download
memory/4832-143-0x0000000005E80000-0x0000000005F1C000-memory.dmp

Filesize
624KB

Download

Analysis

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