blustealer | beb46012919018735132f1ca08c31ac870b2be20e97a4b3fac463616c5504fa0

General

Target

gat.exe
Size

601KB
MD5

add0d682444f2f406e9dfe65a392e74e
SHA1

08d8d51581a189be5beb3f3bb8886b6af250d170
SHA256

beb46012919018735132f1ca08c31ac870b2be20e97a4b3fac463616c5504fa0
SHA512

eccbd3d740d04c372207af34504258882566c4395395e0795143f492c148e2b58a6d33c812810ba35da68578288299c8cd077bcde9d1fd0ad7febb29be09029c
SSDEEP

12288:9Ou3XDG2/F8/C/QpJQJuGHc55JtsFVwv4h05AhH8XUplgGpsaTo:fG2/m/NJE8XJgV5hQwqNGps3

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/4640-159-0x0000000001170000-0x000000000118A000-memory.dmp	family_stormkitty

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Control Panel\International\Geo\Nation	gat.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\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
65	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 424 set thread context of 3696	424	gat.exe	102
PID 3696 set thread context of 4640	3696	gat.exe	103

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	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
4368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4180	powershell.exe
4180	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4180	powershell.exe
Token: SeDebugPrivilege	4640	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3696	gat.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 424 wrote to memory of 4180	424	gat.exe	98
PID 424 wrote to memory of 4180	424	gat.exe	98
PID 424 wrote to memory of 4180	424	gat.exe	98
PID 424 wrote to memory of 4368	424	gat.exe	100
PID 424 wrote to memory of 4368	424	gat.exe	100
PID 424 wrote to memory of 4368	424	gat.exe	100
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 424 wrote to memory of 3696	424	gat.exe	102
PID 3696 wrote to memory of 4640	3696	gat.exe	103
PID 3696 wrote to memory of 4640	3696	gat.exe	103
PID 3696 wrote to memory of 4640	3696	gat.exe	103
PID 3696 wrote to memory of 4640	3696	gat.exe	103
PID 3696 wrote to memory of 4640	3696	gat.exe	103

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\gat.exe
"C:\Users\Admin\AppData\Local\Temp\gat.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:424
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\klKpUWQ.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4180
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\klKpUWQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8201.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4368
- C:\Users\Admin\AppData\Local\Temp\gat.exe
  "C:\Users\Admin\AppData\Local\Temp\gat.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3696
- - 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:4640

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

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8201.tmp

Filesize
1KB

MD5
30ff397347f5f84415b62d55f378796d

SHA1
14a9fa7c491779e8f17cb9943321d11e13b33443

SHA256
0911013977b30d02ceb055f4be7fda2e9575a6fa5baf260aca354be0631ad214

SHA512
8cdfd088f60a0b7faa8de95d6aac8551cb3e297386d68ad8c8698fef999234b5287e09d6f804a0a12e733884cfa9aeb4b75f73ab11ed6e03a0550c3713259f75

Download Submit
memory/424-133-0x0000000005250000-0x00000000057F4000-memory.dmp

Filesize
5.6MB

Download
memory/424-134-0x0000000004CA0000-0x0000000004D32000-memory.dmp

Filesize
584KB

Download
memory/424-135-0x0000000004C30000-0x0000000004C3A000-memory.dmp

Filesize
40KB

Download
memory/424-136-0x0000000007460000-0x00000000074FC000-memory.dmp

Filesize
624KB

Download
memory/424-132-0x0000000000310000-0x00000000003AC000-memory.dmp

Filesize
624KB

Download
memory/3696-142-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3696-165-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3696-151-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3696-145-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4180-149-0x0000000005990000-0x00000000059F6000-memory.dmp

Filesize
408KB

Download
memory/4180-155-0x0000000006670000-0x000000000668E000-memory.dmp

Filesize
120KB

Download
memory/4180-147-0x00000000052A0000-0x00000000052C2000-memory.dmp

Filesize
136KB

Download
memory/4180-140-0x0000000000E70000-0x0000000000EA6000-memory.dmp

Filesize
216KB

Download
memory/4180-150-0x0000000005A70000-0x0000000005AD6000-memory.dmp

Filesize
408KB

Download
memory/4180-143-0x00000000052F0000-0x0000000005918000-memory.dmp

Filesize
6.2MB

Download
memory/4180-152-0x00000000060E0000-0x00000000060FE000-memory.dmp

Filesize
120KB

Download
memory/4180-153-0x0000000006690000-0x00000000066C2000-memory.dmp

Filesize
200KB

Download
memory/4180-154-0x0000000070120000-0x000000007016C000-memory.dmp

Filesize
304KB

Download
memory/4180-163-0x0000000007720000-0x000000000773A000-memory.dmp

Filesize
104KB

Download
memory/4180-156-0x0000000007A20000-0x000000000809A000-memory.dmp

Filesize
6.5MB

Download
memory/4180-157-0x00000000073E0000-0x00000000073FA000-memory.dmp

Filesize
104KB

Download
memory/4180-164-0x0000000007700000-0x0000000007708000-memory.dmp

Filesize
32KB

Download
memory/4180-160-0x0000000007450000-0x000000000745A000-memory.dmp

Filesize
40KB

Download
memory/4180-161-0x0000000007660000-0x00000000076F6000-memory.dmp

Filesize
600KB

Download
memory/4180-162-0x0000000007610000-0x000000000761E000-memory.dmp

Filesize
56KB

Download
memory/4640-159-0x0000000001170000-0x000000000118A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads