blustealer | ab9ca095a67588bf3dd26d2531b38cc5d5a2837ffc1b08859bf31538a414362e

General

Target

TXAUCYB.EXE.exe
Size

21KB
MD5

e2a5f92b1a73e9637e035d65cfc44e51
SHA1

7c27fd80421f732ab36c583c0fb709703da48c52
SHA256

ab9ca095a67588bf3dd26d2531b38cc5d5a2837ffc1b08859bf31538a414362e
SHA512

ec7fbd159fa3638fc5b1b828c84185b93ddb3c7c7c589c3a65054a57a868e1f6c552f0455cd67dc7e70f0076ba904e19a2aa23ecf3260a1921bb3d326cf23d81
SSDEEP

384:PZcW7LjumpBLqQFtXBMh2+DGi0mZqNewLrKcC/kXjRqmxWE4OB/uc2v42A:bfqQFtY2G4mIewLCsXjwmxWtOB/ucCA

Score

10^/10

blustealer stormkitty collection persistence stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5583812995:AAFKzjSLC2-pDvMQ8X47-80XjrRiWrDtxA/sendMessage?chat_id=5434600361

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/4556-149-0x0000000000AB0000-0x0000000000ACA000-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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	TXAUCYB.EXE.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dccflujfd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Qqdouiatn\\Dccflujfd.exe\""	TXAUCYB.EXE.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
23	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3952 set thread context of 3036	3952	TXAUCYB.EXE.exe	92
PID 3036 set thread context of 4556	3036	TXAUCYB.EXE.exe	93

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 behavior: EnumeratesProcesses 2 IoCs

pid	Process
4780	powershell.exe
4780	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	TXAUCYB.EXE.exe
Token: SeDebugPrivilege	4780	powershell.exe
Token: SeDebugPrivilege	4556	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	TXAUCYB.EXE.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 4780	3952	TXAUCYB.EXE.exe	84
PID 3952 wrote to memory of 4780	3952	TXAUCYB.EXE.exe	84
PID 3952 wrote to memory of 4780	3952	TXAUCYB.EXE.exe	84
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3952 wrote to memory of 3036	3952	TXAUCYB.EXE.exe	92
PID 3036 wrote to memory of 4556	3036	TXAUCYB.EXE.exe	93
PID 3036 wrote to memory of 4556	3036	TXAUCYB.EXE.exe	93
PID 3036 wrote to memory of 4556	3036	TXAUCYB.EXE.exe	93
PID 3036 wrote to memory of 4556	3036	TXAUCYB.EXE.exe	93
PID 3036 wrote to memory of 4556	3036	TXAUCYB.EXE.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\TXAUCYB.EXE.exe
"C:\Users\Admin\AppData\Local\Temp\TXAUCYB.EXE.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4780
- C:\Users\Admin\AppData\Local\Temp\TXAUCYB.EXE.exe
  C:\Users\Admin\AppData\Local\Temp\TXAUCYB.EXE.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3036
- - 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:4556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

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

memory/3036-152-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3036-150-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3036-145-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3036-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3952-133-0x00000000062C0000-0x00000000062E2000-memory.dmp

Filesize
136KB

Download
memory/3952-132-0x0000000000C50000-0x0000000000C5C000-memory.dmp

Filesize
48KB

Download
memory/4556-151-0x00000000058C0000-0x000000000595C000-memory.dmp

Filesize
624KB

Download
memory/4556-149-0x0000000000AB0000-0x0000000000ACA000-memory.dmp

Filesize
104KB

Download
memory/4780-136-0x0000000004F80000-0x00000000055A8000-memory.dmp

Filesize
6.2MB

Download
memory/4780-141-0x0000000006300000-0x000000000631A000-memory.dmp

Filesize
104KB

Download
memory/4780-140-0x0000000007480000-0x0000000007AFA000-memory.dmp

Filesize
6.5MB

Download
memory/4780-139-0x0000000005E20000-0x0000000005E3E000-memory.dmp

Filesize
120KB

Download
memory/4780-138-0x0000000005720000-0x0000000005786000-memory.dmp

Filesize
408KB

Download
memory/4780-137-0x00000000056B0000-0x0000000005716000-memory.dmp

Filesize
408KB

Download
memory/4780-135-0x0000000002510000-0x0000000002546000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads