blustealer | 54ad0446c41577df6cd6ad821de9fe3a6a18a0f703c6c0f0a5142ecb88770592

General

Target

987323456.exe
Size

940KB
MD5

f5301ee93125620a8c7fa93e523d31aa
SHA1

5b08b05491db643270895adb7c50764880c88916
SHA256

163d435fa6e2ddd36352dcd076dfb8bb4d5f8fa960bc558b1b3ac8b22b0c0673
SHA512

c3b7f0d496d7d99b28cde39241cf2e7ded134a5d015a675eeea1dfcf906ebcb5799037abe3642a39447465e5ab5388ffdcaf6b3fdd3c740147300decf3e225d0
SSDEEP

12288:hk6a76a8QqSSSVsY6e9HzjkP+nrybWjY/JVye+9UPA:hsGY1TjkP/W9e+YA

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5546226764:AAFgA9orKnIJXfe165J2OAI1h11SWEqFyFQ/sendMessage?chat_id=5461341539

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
behavioral3/memory/1004-73-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral3/memory/1004-74-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral3/memory/1004-76-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral3/memory/1004-78-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\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
3	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1512 set thread context of 2020	1512	987323456.exe	28
PID 2020 set thread context of 1004	2020	987323456.exe	29

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 1 IoCs

pid	Process
1512	987323456.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1512	987323456.exe
Token: SeDebugPrivilege	1004	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2020	987323456.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 2016	1512	987323456.exe	27
PID 1512 wrote to memory of 2016	1512	987323456.exe	27
PID 1512 wrote to memory of 2016	1512	987323456.exe	27
PID 1512 wrote to memory of 2016	1512	987323456.exe	27
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 1512 wrote to memory of 2020	1512	987323456.exe	28
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29
PID 2020 wrote to memory of 1004	2020	987323456.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\987323456.exe
"C:\Users\Admin\AppData\Local\Temp\987323456.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Users\Admin\AppData\Local\Temp\987323456.exe
  "C:\Users\Admin\AppData\Local\Temp\987323456.exe"
  2⤵
  PID:2016
- C:\Users\Admin\AppData\Local\Temp\987323456.exe
  "C:\Users\Admin\AppData\Local\Temp\987323456.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2020
- - 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:1004

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/1004-71-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1004-78-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1004-76-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1004-73-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1512-55-0x00000000008B0000-0x00000000008FE000-memory.dmp

Filesize
312KB

Download
memory/1512-56-0x00000000756A1000-0x00000000756A3000-memory.dmp

Filesize
8KB

Download
memory/1512-57-0x00000000002D0000-0x00000000002E6000-memory.dmp

Filesize
88KB

Download
memory/1512-54-0x0000000000160000-0x0000000000252000-memory.dmp

Filesize
968KB

Download
memory/2020-58-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-69-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-66-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-63-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-59-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-61-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2020-80-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

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