blustealer | 86c12a0ecd9361e829b668493544c3f5e3b0feb7e20989e4db283b2138529dc4

General

Target

Inquiry_110922.exe
Size

181KB
MD5

dcaa23ff8b67e9603f1f076c16c69dc4
SHA1

a5fee6efc8b5d1bb426f5171a118fadeea44db4f
SHA256

86c12a0ecd9361e829b668493544c3f5e3b0feb7e20989e4db283b2138529dc4
SHA512

5f07e68c0f6e187980f44c5efcd42b4a33c11707d5e0aa432b93c4a583df36e25a54264cdeaae22e7999cfcecba2adda969a6195a7ee4340b0cc9888520f69ce
SSDEEP

768:BmhNJS/lozmCBLx7NnByW/vyvFC586HRLdi5DvXr3NZbs8Q:SDS/+ZBlZBVvMIy6HRUBb3NG8Q

Score

10^/10

blustealer stormkitty collection persistence stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5412597166:AAGUaWxuTxxhNb-NRhiURcTMzuW9nhGoEs/sendMessage?chat_id=932962718

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/6648-153-0x0000000000BB0000-0x0000000000BCA000-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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	Inquiry_110922.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xofyfwmyhy = "\"C:\\Users\\Admin\\AppData\\Roaming\\Uhijtsw\\Xofyfwmyhy.exe\""	Inquiry_110922.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
36	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2404 set thread context of 6580	2404	Inquiry_110922.exe	91
PID 6580 set thread context of 6648	6580	InstallUtil.exe	92

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
6640	powershell.exe
6640	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
6580	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2404	Inquiry_110922.exe
Token: SeDebugPrivilege	6640	powershell.exe
Token: SeDebugPrivilege	6648	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
6580	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 6640	2404	Inquiry_110922.exe	86
PID 2404 wrote to memory of 6640	2404	Inquiry_110922.exe	86
PID 2404 wrote to memory of 6640	2404	Inquiry_110922.exe	86
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 2404 wrote to memory of 6580	2404	Inquiry_110922.exe	91
PID 6580 wrote to memory of 6648	6580	InstallUtil.exe	92
PID 6580 wrote to memory of 6648	6580	InstallUtil.exe	92
PID 6580 wrote to memory of 6648	6580	InstallUtil.exe	92
PID 6580 wrote to memory of 6648	6580	InstallUtil.exe	92
PID 6580 wrote to memory of 6648	6580	InstallUtil.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Inquiry_110922.exe
"C:\Users\Admin\AppData\Local\Temp\Inquiry_110922.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:2404
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:6640
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:6580
- - 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:6648

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/2404-133-0x00000000057A0000-0x0000000005D44000-memory.dmp

Filesize
5.6MB

Download
memory/2404-134-0x00000000052D0000-0x0000000005362000-memory.dmp

Filesize
584KB

Download
memory/2404-135-0x00000000052C0000-0x00000000052CA000-memory.dmp

Filesize
40KB

Download
memory/2404-136-0x0000000006B40000-0x0000000006B62000-memory.dmp

Filesize
136KB

Download
memory/2404-132-0x00000000009A0000-0x00000000009D2000-memory.dmp

Filesize
200KB

Download
memory/6580-155-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/6580-151-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/6580-148-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/6580-146-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/6640-143-0x0000000007C60000-0x00000000082DA000-memory.dmp

Filesize
6.5MB

Download
memory/6640-144-0x0000000006AE0000-0x0000000006AFA000-memory.dmp

Filesize
104KB

Download
memory/6640-142-0x00000000065F0000-0x000000000660E000-memory.dmp

Filesize
120KB

Download
memory/6640-141-0x0000000005EF0000-0x0000000005F56000-memory.dmp

Filesize
408KB

Download
memory/6640-140-0x0000000005E80000-0x0000000005EE6000-memory.dmp

Filesize
408KB

Download
memory/6640-139-0x0000000005850000-0x0000000005E78000-memory.dmp

Filesize
6.2MB

Download
memory/6640-138-0x0000000003010000-0x0000000003046000-memory.dmp

Filesize
216KB

Download
memory/6648-153-0x0000000000BB0000-0x0000000000BCA000-memory.dmp

Filesize
104KB

Download
memory/6648-154-0x0000000005C90000-0x0000000005D2C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads