blustealer | 10a21ba560b553a5dba93ade103a4d1d83c8e854b0b0ab7c0a5708b3140cecb1

General

Target

PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe
Size

173KB
MD5

aa62a2e500e77406ee1feabe645e3008
SHA1

714fd037f44ff095e9d95c96a62525ed310ad0ce
SHA256

10a21ba560b553a5dba93ade103a4d1d83c8e854b0b0ab7c0a5708b3140cecb1
SHA512

bd2220aaa2757b190e2224d25de79152110f12eda824eff9ec7fcfe1c80f870a064bbd174d1daac42d04af48cdcd6c4f8b88e41f89bbcb9ee65ac2e7e468b3cf
SSDEEP

3072:BQD5gQafc+zI/yjCXI7Kz0oJpQT+d5npbCYoS27uGx6BjAH2vqyy6+q:JPzdEIYfJpDd1XS6WH

Score

10^/10

blustealer stormkitty collection spyware stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5627356603:AAG-Mx0TbSHRRW6IwndrpX3VLZdhd6C-Zac/sendMessage?chat_id=5472437377

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/560-74-0x00000000000E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/560-73-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/560-76-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/560-78-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

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 1760 set thread context of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1812 set thread context of 560	1812	cvtres.exe	29

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
1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe
Token: SeDebugPrivilege	560	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1812	cvtres.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 1092	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	27
PID 1760 wrote to memory of 1092	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	27
PID 1760 wrote to memory of 1092	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	27
PID 1760 wrote to memory of 1092	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	27
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1760 wrote to memory of 1812	1760	PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe	28
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29
PID 1812 wrote to memory of 560	1812	cvtres.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe
"C:\Users\Admin\AppData\Local\Temp\PRUEBA DE TRANSFERENCIA-03-10-22.xlxs(~76KB).exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  PID:1092
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1812
- - 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:560

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/560-71-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/560-78-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/560-76-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/560-73-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1760-55-0x0000000000270000-0x0000000000278000-memory.dmp

Filesize
32KB

Download
memory/1760-56-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/1760-57-0x0000000000290000-0x000000000029A000-memory.dmp

Filesize
40KB

Download
memory/1760-54-0x0000000000AE0000-0x0000000000B0C000-memory.dmp

Filesize
176KB

Download
memory/1812-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-69-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/1812-70-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-66-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-63-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1812-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download

Analysis

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