blustealer | 8819206811368498419730b1dd0d56018e877d004798747b5f2ef2d6b372641a

General

Target

sample.exe
Size

1.0MB
MD5

82a1be67742da347df519c0c0b75ed87
SHA1

163e5d1758c7be66a6a3a35d2f9973d209383567
SHA256

02a1835ea805bb1a6ca8d1706fa5a811279ec3fcb1524eb83cfa60f0314cf0dd
SHA512

d2051aa0284e0ab9151417d05eafc037695c32d6bf67512b2c8155ecc303774bdc950c24a658fb88787c4f1c3f6ae8bb0bba2017d90129afcbf484f40baaa4a7
SSDEEP

12288:I5bIINzS9JAJgapke+yoaYRy6Wrq2vElGv9W:qbNzoJ0gakNy9cjWm2UGv

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5415235188:AAGqakDD6FZcw5LLX6hH5qVayV-1OGURlEo/sendMessage?chat_id=1372472614

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/1500-158-0x00000000005B0000-0x00000000005CA000-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	sample.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

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
72	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 628 set thread context of 764	628	sample.exe	101
PID 764 set thread context of 1500	764	sample.exe	102

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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2460	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
628	sample.exe
628	sample.exe
628	sample.exe
628	sample.exe
628	sample.exe
628	sample.exe
628	sample.exe
2256	powershell.exe
2256	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
764	sample.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	628	sample.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	1500	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
764	sample.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 628 wrote to memory of 2256	628	sample.exe	97
PID 628 wrote to memory of 2256	628	sample.exe	97
PID 628 wrote to memory of 2256	628	sample.exe	97
PID 628 wrote to memory of 2460	628	sample.exe	99
PID 628 wrote to memory of 2460	628	sample.exe	99
PID 628 wrote to memory of 2460	628	sample.exe	99
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 628 wrote to memory of 764	628	sample.exe	101
PID 764 wrote to memory of 1500	764	sample.exe	102
PID 764 wrote to memory of 1500	764	sample.exe	102
PID 764 wrote to memory of 1500	764	sample.exe	102
PID 764 wrote to memory of 1500	764	sample.exe	102
PID 764 wrote to memory of 1500	764	sample.exe	102

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\sample.exe
"C:\Users\Admin\AppData\Local\Temp\sample.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:628
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\fjuIjtcpvLma.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2256
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fjuIjtcpvLma" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBBFD.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2460
- C:\Users\Admin\AppData\Local\Temp\sample.exe
  "C:\Users\Admin\AppData\Local\Temp\sample.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:764
- - 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:1500

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\tmpBBFD.tmp

Filesize
1KB

MD5
c94f62ce2e7a2b7d1e86d06235530c94

SHA1
f3e8865709d028052062677528f1a3f41c3bfcf6

SHA256
ee67e67421115016a376bb60d3ee9960940210089f755d87f679bed6c5477541

SHA512
21ee8f3ea83a6cf3901344b28a70880b6aeac9af91d89175f99cc8cd25f993ab251db846920ec6e78286b225b06c8d8314cef55a3bf20d743349325ad1d614d6

Download Submit
memory/628-135-0x0000000004F60000-0x0000000004F6A000-memory.dmp

Filesize
40KB

Download
memory/628-134-0x0000000005010000-0x00000000050A2000-memory.dmp

Filesize
584KB

Download
memory/628-136-0x0000000008BC0000-0x0000000008C5C000-memory.dmp

Filesize
624KB

Download
memory/628-137-0x0000000000E40000-0x0000000000EA6000-memory.dmp

Filesize
408KB

Download
memory/628-133-0x00000000055C0000-0x0000000005B64000-memory.dmp

Filesize
5.6MB

Download
memory/628-132-0x00000000004C0000-0x00000000005CE000-memory.dmp

Filesize
1.1MB

Download
memory/764-146-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/764-164-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/764-144-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1500-158-0x00000000005B0000-0x00000000005CA000-memory.dmp

Filesize
104KB

Download
memory/2256-156-0x0000000007040000-0x000000000705A000-memory.dmp

Filesize
104KB

Download
memory/2256-140-0x0000000002410000-0x0000000002446000-memory.dmp

Filesize
216KB

Download
memory/2256-150-0x0000000005010000-0x0000000005076000-memory.dmp

Filesize
408KB

Download
memory/2256-151-0x0000000005D20000-0x0000000005D3E000-memory.dmp

Filesize
120KB

Download
memory/2256-152-0x0000000006D30000-0x0000000006D62000-memory.dmp

Filesize
200KB

Download
memory/2256-153-0x00000000718D0000-0x000000007191C000-memory.dmp

Filesize
304KB

Download
memory/2256-154-0x00000000062D0000-0x00000000062EE000-memory.dmp

Filesize
120KB

Download
memory/2256-155-0x00000000076A0000-0x0000000007D1A000-memory.dmp

Filesize
6.5MB

Download
memory/2256-143-0x0000000005110000-0x0000000005738000-memory.dmp

Filesize
6.2MB

Download
memory/2256-149-0x0000000004F70000-0x0000000004F92000-memory.dmp

Filesize
136KB

Download
memory/2256-159-0x00000000070A0000-0x00000000070AA000-memory.dmp

Filesize
40KB

Download
memory/2256-160-0x00000000072B0000-0x0000000007346000-memory.dmp

Filesize
600KB

Download
memory/2256-161-0x0000000007260000-0x000000000726E000-memory.dmp

Filesize
56KB

Download
memory/2256-162-0x0000000007370000-0x000000000738A000-memory.dmp

Filesize
104KB

Download
memory/2256-163-0x0000000007350000-0x0000000007358000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads