blustealer | 8ae01f38de83a0fa5f9c1dfe88fbcc594b779a8e4457bbe7ec046d541696a11a

General

Target

SKM__C20192910887888001990.pdf.exe
Size

720KB
MD5

0948091d10a9fdd5f17945c5216d6dc6
SHA1

cdcb0c62e7a84d1d5c8fa62aa78a18fa546df48e
SHA256

8ae01f38de83a0fa5f9c1dfe88fbcc594b779a8e4457bbe7ec046d541696a11a
SHA512

00904155d6fd262b6297219a15d656d445cba84af12ec63aaf11c8f0b99090070d12ec5ed2a33e0457d096084ea08fa53c1d728067b6b3ab42845b0db51d1c0f
SSDEEP

12288:Snp7Cef/Ycos8A7jvNU55AU9PgwMmxa689X/2EETC:wUshv28U9NMmx58xETC

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5468731092:AAGGNQWBVRhX622u6xp1moMhaunIGtXuIxg/sendMessage?chat_id=1639214896

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/868-74-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/868-75-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/868-78-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/868-80-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

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
4	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1552 set thread context of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1480 set thread context of 868	1480	SKM__C20192910887888001990.pdf.exe	28

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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 6 IoCs

pid	Process
1552	SKM__C20192910887888001990.pdf.exe
1552	SKM__C20192910887888001990.pdf.exe
1552	SKM__C20192910887888001990.pdf.exe
1552	SKM__C20192910887888001990.pdf.exe
1552	SKM__C20192910887888001990.pdf.exe
1552	SKM__C20192910887888001990.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1552	SKM__C20192910887888001990.pdf.exe
Token: SeDebugPrivilege	868	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1480	SKM__C20192910887888001990.pdf.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 1472	1552	SKM__C20192910887888001990.pdf.exe	26
PID 1552 wrote to memory of 1472	1552	SKM__C20192910887888001990.pdf.exe	26
PID 1552 wrote to memory of 1472	1552	SKM__C20192910887888001990.pdf.exe	26
PID 1552 wrote to memory of 1472	1552	SKM__C20192910887888001990.pdf.exe	26
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1552 wrote to memory of 1480	1552	SKM__C20192910887888001990.pdf.exe	27
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28
PID 1480 wrote to memory of 868	1480	SKM__C20192910887888001990.pdf.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1552
- C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe"
  2⤵
  PID:1472
- C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\SKM__C20192910887888001990.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1480
- - 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:868

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/868-72-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/868-80-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/868-78-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/868-74-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1480-63-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-76-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-61-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-68-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1480-60-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1552-58-0x0000000007CA0000-0x0000000007D20000-memory.dmp

Filesize
512KB

Download
memory/1552-57-0x0000000000500000-0x000000000050C000-memory.dmp

Filesize
48KB

Download
memory/1552-59-0x0000000002070000-0x0000000002098000-memory.dmp

Filesize
160KB

Download
memory/1552-56-0x0000000000310000-0x0000000000326000-memory.dmp

Filesize
88KB

Download
memory/1552-55-0x0000000075681000-0x0000000075683000-memory.dmp

Filesize
8KB

Download
memory/1552-54-0x0000000000230000-0x00000000002EA000-memory.dmp

Filesize
744KB

Download

Analysis

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