blustealer | b5141a3c6323449bc7fc031d6eb2073fcbe97754c46eef0d0d8f937b9c2fb5cb

General

Target

Purchase Order 711014151.pdf.exe
Size

709KB
MD5

88624e9e57c3471f10b62bf0afb40c4d
SHA1

d3b3df4c13d104d0b277cd243d9f5c1e6a673ead
SHA256

b5141a3c6323449bc7fc031d6eb2073fcbe97754c46eef0d0d8f937b9c2fb5cb
SHA512

b45c32c38416977b432b2e03b867e5e58be128e75ff2292bb07f820dec88636e7be63168b95e7413ddf86832239e138d68e8ec5fe70567e8e8cf11582919c041

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

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/1768-146-0x0000000000B30000-0x0000000000B4A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\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
55	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4320 set thread context of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4496 set thread context of 1768	4496	Purchase Order 711014151.pdf.exe	94

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 11 IoCs

pid	Process
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe
4320	Purchase Order 711014151.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4320	Purchase Order 711014151.pdf.exe
Token: SeDebugPrivilege	1768	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	Purchase Order 711014151.pdf.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 5036	4320	Purchase Order 711014151.pdf.exe	91
PID 4320 wrote to memory of 5036	4320	Purchase Order 711014151.pdf.exe	91
PID 4320 wrote to memory of 5036	4320	Purchase Order 711014151.pdf.exe	91
PID 4320 wrote to memory of 5108	4320	Purchase Order 711014151.pdf.exe	92
PID 4320 wrote to memory of 5108	4320	Purchase Order 711014151.pdf.exe	92
PID 4320 wrote to memory of 5108	4320	Purchase Order 711014151.pdf.exe	92
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4320 wrote to memory of 4496	4320	Purchase Order 711014151.pdf.exe	93
PID 4496 wrote to memory of 1768	4496	Purchase Order 711014151.pdf.exe	94
PID 4496 wrote to memory of 1768	4496	Purchase Order 711014151.pdf.exe	94
PID 4496 wrote to memory of 1768	4496	Purchase Order 711014151.pdf.exe	94
PID 4496 wrote to memory of 1768	4496	Purchase Order 711014151.pdf.exe	94
PID 4496 wrote to memory of 1768	4496	Purchase Order 711014151.pdf.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe"
  2⤵
  PID:5036
- C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe"
  2⤵
  PID:5108
- C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase Order 711014151.pdf.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:1768

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/1768-146-0x0000000000B30000-0x0000000000B4A000-memory.dmp

Filesize
104KB

Download
memory/4320-130-0x0000000000550000-0x0000000000608000-memory.dmp

Filesize
736KB

Download
memory/4320-131-0x00000000054C0000-0x0000000005A64000-memory.dmp

Filesize
5.6MB

Download
memory/4320-132-0x0000000004FF0000-0x0000000005082000-memory.dmp

Filesize
584KB

Download
memory/4320-133-0x0000000004FC0000-0x0000000004FCA000-memory.dmp

Filesize
40KB

Download
memory/4320-134-0x00000000089F0000-0x0000000008A8C000-memory.dmp

Filesize
624KB

Download
memory/4320-135-0x0000000000B60000-0x0000000000BC6000-memory.dmp

Filesize
408KB

Download
memory/4496-139-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4496-141-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4496-144-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4496-147-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

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