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 4 IoCs

resource	yara_rule
behavioral1/memory/1056-78-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1056-79-0x00000000000E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1056-81-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1056-83-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2591564548-2301609547-1748242483-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2591564548-2301609547-1748242483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2591564548-2301609547-1748242483-1000\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 1032 set thread context of 1840	1032	gat.exe	31
PID 1840 set thread context of 1056	1840	gat.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
980	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2000	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2000	powershell.exe
Token: SeDebugPrivilege	1056	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1840	gat.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 2000	1032	gat.exe	27
PID 1032 wrote to memory of 2000	1032	gat.exe	27
PID 1032 wrote to memory of 2000	1032	gat.exe	27
PID 1032 wrote to memory of 2000	1032	gat.exe	27
PID 1032 wrote to memory of 980	1032	gat.exe	29
PID 1032 wrote to memory of 980	1032	gat.exe	29
PID 1032 wrote to memory of 980	1032	gat.exe	29
PID 1032 wrote to memory of 980	1032	gat.exe	29
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1032 wrote to memory of 1840	1032	gat.exe	31
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32
PID 1840 wrote to memory of 1056	1840	gat.exe	32

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2591564548-2301609547-1748242483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2591564548-2301609547-1748242483-1000\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⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1032
- 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:2000
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\klKpUWQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDD65.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:980
- 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:1840
- - 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:1056

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\tmpDD65.tmp

Filesize
1KB

MD5
57481529a45f9dbc7f6ae3a81d654ec5

SHA1
b50eac6dbdf11ff5236d767861dd64b6ee993f79

SHA256
b0f1d696b2a837bf08da4b0e44300cb82a03b2cf8bfda8f455ad9dd8597fd00d

SHA512
c977eca7b4d434e71d9589d343bbfa2d4880a2a5ecd92bdb7bc2d8a52ab3433e643aa3943ea695f8841a44136a0d631dc6523c2b7689c1260692bd431e836794

Download Submit
memory/1032-63-0x0000000000E10000-0x0000000000E38000-memory.dmp

Filesize
160KB

Download
memory/1032-55-0x0000000076051000-0x0000000076053000-memory.dmp

Filesize
8KB

Download
memory/1032-56-0x00000000003C0000-0x00000000003DA000-memory.dmp

Filesize
104KB

Download
memory/1032-57-0x00000000004F0000-0x00000000004FC000-memory.dmp

Filesize
48KB

Download
memory/1032-58-0x0000000005450000-0x00000000054C4000-memory.dmp

Filesize
464KB

Download
memory/1032-54-0x0000000000EC0000-0x0000000000F5C000-memory.dmp

Filesize
624KB

Download
memory/1056-81-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1056-76-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1056-83-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1056-78-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1840-69-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-72-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-64-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-67-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-85-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1840-88-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2000-86-0x0000000074E50000-0x00000000753FB000-memory.dmp

Filesize
5.7MB

Download
memory/2000-87-0x0000000074E50000-0x00000000753FB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads