blustealer | 00bcf28771526c2f876a4135520a4eb5a373f6671ea6c94eea36ce2cccbc8e43

General

Target

_220926_.EXE.exe
Size

204KB
MD5

1a6cd2ff652a3c9c909682a62fa6e25a
SHA1

54a16855a8a48f4f847a0a8ca66a2f26b333b2cd
SHA256

00bcf28771526c2f876a4135520a4eb5a373f6671ea6c94eea36ce2cccbc8e43
SHA512

316d788ef92ee882d39dce5f8a61b34c783b61466b6f1682f1fcf055bdc2c290990abd1a93cdf9774616d32968e23acd8dfb609d6a4b8880110a8ef4f1298385
SSDEEP

3072:8I42jI06VSyw9rPdTlYpw3BC/3MYxLXVnSCLr/nEayyGq:8z7yywlPdhYqxm3H5SC

Score

10^/10

blustealer stormkitty collection spyware stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5641602090:AAFgkXeQEDF1Zq8nmUMQJA2TjfP0wsTJyeM/sendMessage?chat_id=1755939698

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/2968-142-0x0000000000D60000-0x0000000000D7A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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
12	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4436 set thread context of 5032	4436	_220926_.EXE.exe	80
PID 5032 set thread context of 2968	5032	cvtres.exe	85

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 2 IoCs

pid	Process
4436	_220926_.EXE.exe
4436	_220926_.EXE.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	_220926_.EXE.exe
Token: SeDebugPrivilege	2968	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5032	cvtres.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 4976	4436	_220926_.EXE.exe	79
PID 4436 wrote to memory of 4976	4436	_220926_.EXE.exe	79
PID 4436 wrote to memory of 4976	4436	_220926_.EXE.exe	79
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 4436 wrote to memory of 5032	4436	_220926_.EXE.exe	80
PID 5032 wrote to memory of 2968	5032	cvtres.exe	85
PID 5032 wrote to memory of 2968	5032	cvtres.exe	85
PID 5032 wrote to memory of 2968	5032	cvtres.exe	85
PID 5032 wrote to memory of 2968	5032	cvtres.exe	85
PID 5032 wrote to memory of 2968	5032	cvtres.exe	85

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\_220926_.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\_220926_.EXE.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
  2⤵
  PID:4976
- 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:5032
- - 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:2968

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/2968-142-0x0000000000D60000-0x0000000000D7A000-memory.dmp

Filesize
104KB

Download
memory/2968-143-0x00000000051F0000-0x0000000005256000-memory.dmp

Filesize
408KB

Download
memory/2968-144-0x0000000005A30000-0x0000000005ACC000-memory.dmp

Filesize
624KB

Download
memory/4436-132-0x0000000000170000-0x00000000001A4000-memory.dmp

Filesize
208KB

Download
memory/5032-135-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/5032-137-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/5032-140-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/5032-145-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

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