blustealer | 8819206811368498419730b1dd0d56018e877d004798747b5f2ef2d6b372641a

General

Target

sample.exe
Size

1.0MB
MD5

82a1be67742da347df519c0c0b75ed87
SHA1

163e5d1758c7be66a6a3a35d2f9973d209383567
SHA256

02a1835ea805bb1a6ca8d1706fa5a811279ec3fcb1524eb83cfa60f0314cf0dd
SHA512

d2051aa0284e0ab9151417d05eafc037695c32d6bf67512b2c8155ecc303774bdc950c24a658fb88787c4f1c3f6ae8bb0bba2017d90129afcbf484f40baaa4a7
SSDEEP

12288:I5bIINzS9JAJgapke+yoaYRy6Wrq2vElGv9W:qbNzoJ0gakNy9cjWm2UGv

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5415235188:AAGqakDD6FZcw5LLX6hH5qVayV-1OGURlEo/sendMessage?chat_id=1372472614

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/1336-80-0x0000000000190000-0x00000000001AA000-memory.dmp	family_stormkitty
behavioral1/memory/1336-81-0x00000000001A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1336-83-0x0000000000190000-0x00000000001AA000-memory.dmp	family_stormkitty
behavioral1/memory/1336-85-0x0000000000190000-0x00000000001AA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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
4	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 536 set thread context of 1888	536	sample.exe	31
PID 1888 set thread context of 1336	1888	sample.exe	32

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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1980	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
536	sample.exe
2024	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	536	sample.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	1336	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1888	sample.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 2024	536	sample.exe	27
PID 536 wrote to memory of 2024	536	sample.exe	27
PID 536 wrote to memory of 2024	536	sample.exe	27
PID 536 wrote to memory of 2024	536	sample.exe	27
PID 536 wrote to memory of 1980	536	sample.exe	29
PID 536 wrote to memory of 1980	536	sample.exe	29
PID 536 wrote to memory of 1980	536	sample.exe	29
PID 536 wrote to memory of 1980	536	sample.exe	29
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 536 wrote to memory of 1888	536	sample.exe	31
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32
PID 1888 wrote to memory of 1336	1888	sample.exe	32

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fjuIjtcpvLma.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2024
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fjuIjtcpvLma" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEF20.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1980
- C:\Users\Admin\AppData\Local\Temp\sample.exe
  "C:\Users\Admin\AppData\Local\Temp\sample.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1888
- - 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:1336

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpEF20.tmp

Filesize
1KB

MD5
0d69b519de6730983e7a2ffe468b5aba

SHA1
8b815a2abc4a0accbc494df71e7c4e7ecafb677c

SHA256
cd6ef0c744b9db3ed48251b484b4e211d0f541d5de8529d942c9e44992d98c66

SHA512
fc3b3b971f09f66fc43ef55458ca55effc36df94f67f101b0548f4b25f9d006bb8e1134c135eced45e23bed4a9a33cc70fa9bacacbc587c4765be207d54cafc2

Download Submit
memory/536-54-0x0000000001200000-0x000000000130E000-memory.dmp

Filesize
1.1MB

Download
memory/536-55-0x0000000076831000-0x0000000076833000-memory.dmp

Filesize
8KB

Download
memory/536-56-0x0000000000490000-0x00000000004AA000-memory.dmp

Filesize
104KB

Download
memory/536-57-0x0000000000540000-0x000000000054C000-memory.dmp

Filesize
48KB

Download
memory/536-58-0x0000000005180000-0x0000000005202000-memory.dmp

Filesize
520KB

Download
memory/536-63-0x0000000000F80000-0x0000000000FAA000-memory.dmp

Filesize
168KB

Download
memory/1336-85-0x0000000000190000-0x00000000001AA000-memory.dmp

Filesize
104KB

Download
memory/1336-83-0x0000000000190000-0x00000000001AA000-memory.dmp

Filesize
104KB

Download
memory/1336-80-0x0000000000190000-0x00000000001AA000-memory.dmp

Filesize
104KB

Download
memory/1336-78-0x0000000000190000-0x00000000001AA000-memory.dmp

Filesize
104KB

Download
memory/1888-69-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-72-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-77-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-67-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-65-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-64-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1888-88-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2024-76-0x000000006F120000-0x000000006F6CB000-memory.dmp

Filesize
5.7MB

Download
memory/2024-87-0x000000006F120000-0x000000006F6CB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads