blustealer | 5d1d48e562d8aa8f1da58485b809b0642a6eec54d043c183d7519020214232af

General

Target

Comprobante transferencia.js
Size

9KB
MD5

b6c2df8872800fb0ff88a0a8e18d30cd
SHA1

7f4c653be69760ba00e27eed161a7357095e2766
SHA256

5d1d48e562d8aa8f1da58485b809b0642a6eec54d043c183d7519020214232af
SHA512

9fca0dae9ae82ab230c54f8c5c9e73376918198ec5613685b3438fd37a60f352f441c141b105b596d35464c9dfe9c386b7e291f446e0b4b8323ffafadcbba1fe
SSDEEP

192:yxl1ldLn3HPgwaNjoymWe+UtEM6TKAkXqoKCpltawnbqbMzJDuDm5cttDgpjDjdW:oLrCsyzeLtEMZ/qojlhbqbANU9DglBH2

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 1 IoCs

resource	yara_rule
behavioral2/memory/2368-145-0x0000000000710000-0x000000000072A000-memory.dmp	family_stormkitty

Blocklisted process makes network request 3 IoCs

flow	pid	Process
5	2676	wscript.exe
7	2676	wscript.exe
9	2676	wscript.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4940	HGhNkPJ.exe

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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	wscript.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\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
16	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4940 set thread context of 1264	4940	HGhNkPJ.exe	81
PID 1264 set thread context of 2368	1264	Caspol.exe	85

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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2368	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1264	Caspol.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2676 wrote to memory of 4940	2676	wscript.exe	79
PID 2676 wrote to memory of 4940	2676	wscript.exe	79
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 4940 wrote to memory of 1264	4940	HGhNkPJ.exe	81
PID 1264 wrote to memory of 2368	1264	Caspol.exe	85
PID 1264 wrote to memory of 2368	1264	Caspol.exe	85
PID 1264 wrote to memory of 2368	1264	Caspol.exe	85
PID 1264 wrote to memory of 2368	1264	Caspol.exe	85
PID 1264 wrote to memory of 2368	1264	Caspol.exe	85

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Comprobante transferencia.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2676
- C:\Users\Admin\AppData\Local\Temp\HGhNkPJ.exe
  "C:\Users\Admin\AppData\Local\Temp\HGhNkPJ.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1264
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      4⤵
      Accesses Microsoft Outlook profiles
      Checks processor information in registry
      Suspicious use of AdjustPrivilegeToken
      outlook_office_path
      outlook_win_path
      PID:2368

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\HGhNkPJ.exe

Filesize
173KB

MD5
985745e529de2497898b930275ef1537

SHA1
23bf50a84ed472e0545ca52265797676c466e50c

SHA256
ace45c627669f173609fc412bd4516c50906c120a245e8e0eb27028e62ce804b

SHA512
584b742a40d55faed1b7c9b9892ab85e37709934eb403ae51232e94589494f5bf1017b744809ecae51df4b5655f352804a364135f0576e7e72b82c99b0804d02

Download Submit
C:\Users\Admin\AppData\Local\Temp\HGhNkPJ.exe

Filesize
173KB

MD5
985745e529de2497898b930275ef1537

SHA1
23bf50a84ed472e0545ca52265797676c466e50c

SHA256
ace45c627669f173609fc412bd4516c50906c120a245e8e0eb27028e62ce804b

SHA512
584b742a40d55faed1b7c9b9892ab85e37709934eb403ae51232e94589494f5bf1017b744809ecae51df4b5655f352804a364135f0576e7e72b82c99b0804d02

Download Submit
memory/1264-143-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1264-148-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1264-136-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1264-139-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2368-145-0x0000000000710000-0x000000000072A000-memory.dmp

Filesize
104KB

Download
memory/2368-146-0x0000000004CD0000-0x0000000004D36000-memory.dmp

Filesize
408KB

Download
memory/2368-147-0x0000000005690000-0x000000000572C000-memory.dmp

Filesize
624KB

Download
memory/4940-140-0x00007FFBA6AB0000-0x00007FFBA7571000-memory.dmp

Filesize
10.8MB

Download
memory/4940-135-0x0000027BA51B0000-0x0000027BA51E2000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads