blustealer | ecd2c1eb9e0c374746d9148a15db8deb551d46d3c45bd075e7928b1f3210f4bc

General

Target

tmp.exe
Size

881KB
MD5

4b28d8e218f5dfe20541b32fca297074
SHA1

a5b715011f2bd3229e3acf3d88131a61043eba1a
SHA256

ecd2c1eb9e0c374746d9148a15db8deb551d46d3c45bd075e7928b1f3210f4bc
SHA512

04fac1bf2cb45ea967ddf9e5cf34fc1582b094fd0d0423ba6f56e889fb9e58b6b85f848201855446f540de19b8665fef1bc5d5f07face17955682cbcad4707ac
SSDEEP

12288:rMXcyHcfKPLcYdXQawrPI2F2QVokACzkRj8U8oxfEunphMnX:QNcfMLciXQlrR2QukACgRHM

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5576673774:AAF__hFRh9bcJV72HkFb-9eZR9JNNyuOmFM/sendMessage?chat_id=1194722650

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/4120-147-0x0000000001220000-0x000000000123A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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
45	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4924 set thread context of 4108	4924	tmp.exe	87
PID 4108 set thread context of 4120	4108	tmp.exe	90

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	AppLaunch.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4924	tmp.exe
4924	tmp.exe
4924	tmp.exe
4924	tmp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	tmp.exe
Token: SeDebugPrivilege	4120	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4108	tmp.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 2636	4924	tmp.exe	85
PID 4924 wrote to memory of 2636	4924	tmp.exe	85
PID 4924 wrote to memory of 2636	4924	tmp.exe	85
PID 4924 wrote to memory of 4400	4924	tmp.exe	86
PID 4924 wrote to memory of 4400	4924	tmp.exe	86
PID 4924 wrote to memory of 4400	4924	tmp.exe	86
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4924 wrote to memory of 4108	4924	tmp.exe	87
PID 4108 wrote to memory of 4120	4108	tmp.exe	90
PID 4108 wrote to memory of 4120	4108	tmp.exe	90
PID 4108 wrote to memory of 4120	4108	tmp.exe	90
PID 4108 wrote to memory of 4120	4108	tmp.exe	90
PID 4108 wrote to memory of 4120	4108	tmp.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4924
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  PID:2636
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  PID:4400
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4108
- - 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:4120

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/4108-141-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4108-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4120-147-0x0000000001220000-0x000000000123A000-memory.dmp

Filesize
104KB

Download
memory/4924-134-0x00000000050A0000-0x0000000005132000-memory.dmp

Filesize
584KB

Download
memory/4924-135-0x0000000005090000-0x000000000509A000-memory.dmp

Filesize
40KB

Download
memory/4924-136-0x000000000B7F0000-0x000000000B88C000-memory.dmp

Filesize
624KB

Download
memory/4924-137-0x000000000B890000-0x000000000B8F6000-memory.dmp

Filesize
408KB

Download
memory/4924-133-0x00000000055B0000-0x0000000005B54000-memory.dmp

Filesize
5.6MB

Download
memory/4924-132-0x00000000005F0000-0x00000000006D2000-memory.dmp

Filesize
904KB

Download

Analysis

Sharing