blustealer | 5ca2237bf4f41e455bb122ec22e4ff1e4c8f19ab9df374d813bec103cf15c8b8

General

Target

RFQ.exe
Size

717KB
MD5

adfe5763366becc479e84b0b1269c8cc
SHA1

baf4764638d384e5075d453fad14ac0fd85f7790
SHA256

0c2ab8c24c4c1d47f3c1417e5e0fd327336e9a88203e414b94b66e81fa45c316
SHA512

e20e62e8cc91b5c713950eef6a9164e649ea1e7c946a600c2e0ef472ee9face6cf675a3636a25a19d5dd8ef93e9b5dbb925584e9d2ed694af37deabad89b5c48
SSDEEP

12288:YoqTTjquLI9jf5NsYdjsEjHnTB3IaBrB04sGNn/lBij2l0/eGRYpyuD8Iy/Je/XG:YoqD7kFRNxdjsEjzB37B04sGNn/lBijT

Score

10^/10

blustealer stormkitty collection 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/5012-157-0x0000000001220000-0x000000000123A000-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	RFQ.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
44	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4964 set thread context of 3456	4964	RFQ.exe	95
PID 3456 set thread context of 5012	3456	RFQ.exe	96

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
3872	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2836	powershell.exe
2836	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3456	RFQ.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	powershell.exe
Token: SeDebugPrivilege	5012	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3456	RFQ.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 2836	4964	RFQ.exe	91
PID 4964 wrote to memory of 2836	4964	RFQ.exe	91
PID 4964 wrote to memory of 2836	4964	RFQ.exe	91
PID 4964 wrote to memory of 3872	4964	RFQ.exe	93
PID 4964 wrote to memory of 3872	4964	RFQ.exe	93
PID 4964 wrote to memory of 3872	4964	RFQ.exe	93
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 4964 wrote to memory of 3456	4964	RFQ.exe	95
PID 3456 wrote to memory of 5012	3456	RFQ.exe	96
PID 3456 wrote to memory of 5012	3456	RFQ.exe	96
PID 3456 wrote to memory of 5012	3456	RFQ.exe	96
PID 3456 wrote to memory of 5012	3456	RFQ.exe	96
PID 3456 wrote to memory of 5012	3456	RFQ.exe	96

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\RFQ.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\nUlGuWTjq.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nUlGuWTjq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4C4B.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3872
- C:\Users\Admin\AppData\Local\Temp\RFQ.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3456
- - 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:5012

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\tmp4C4B.tmp

Filesize
1KB

MD5
589097b72a42b272c892d14461b7a93c

SHA1
18dfc8dbccf80c0685a7c16767b55d010a8d8442

SHA256
bf9e07f24d1c9aeabbb1f44c54098278f434621456a922b2b25364f06997b0df

SHA512
88027180ee1ab1e879f09b156a6567f92072138ece9d01ae6e17190c1d63ce78337cc9ecb575a23054c30218b05e1c7f631833f065a4481faea03cb70b4ff1dc

Download Submit
memory/2836-152-0x00000000052E0000-0x0000000005346000-memory.dmp

Filesize
408KB

Download
memory/2836-163-0x0000000007570000-0x000000000757A000-memory.dmp

Filesize
40KB

Download
memory/2836-153-0x00000000059E0000-0x0000000005A46000-memory.dmp

Filesize
408KB

Download
memory/2836-167-0x0000000007830000-0x0000000007838000-memory.dmp

Filesize
32KB

Download
memory/2836-166-0x0000000007850000-0x000000000786A000-memory.dmp

Filesize
104KB

Download
memory/2836-142-0x00000000028C0000-0x00000000028F6000-memory.dmp

Filesize
216KB

Download
memory/2836-165-0x0000000007740000-0x000000000774E000-memory.dmp

Filesize
56KB

Download
memory/2836-164-0x0000000007790000-0x0000000007826000-memory.dmp

Filesize
600KB

Download
memory/2836-158-0x00000000067C0000-0x00000000067F2000-memory.dmp

Filesize
200KB

Download
memory/2836-162-0x0000000007500000-0x000000000751A000-memory.dmp

Filesize
104KB

Download
memory/2836-149-0x00000000053B0000-0x00000000059D8000-memory.dmp

Filesize
6.2MB

Download
memory/2836-151-0x0000000005240000-0x0000000005262000-memory.dmp

Filesize
136KB

Download
memory/2836-161-0x0000000007B40000-0x00000000081BA000-memory.dmp

Filesize
6.5MB

Download
memory/2836-160-0x0000000006790000-0x00000000067AE000-memory.dmp

Filesize
120KB

Download
memory/2836-159-0x0000000071820000-0x000000007186C000-memory.dmp

Filesize
304KB

Download
memory/2836-155-0x0000000006200000-0x000000000621E000-memory.dmp

Filesize
120KB

Download
memory/3456-168-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3456-147-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3456-145-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3456-154-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4964-138-0x0000000004D70000-0x0000000004D7A000-memory.dmp

Filesize
40KB

Download
memory/4964-135-0x0000000000280000-0x0000000000338000-memory.dmp

Filesize
736KB

Download
memory/4964-137-0x0000000004CC0000-0x0000000004D52000-memory.dmp

Filesize
584KB

Download
memory/4964-136-0x0000000005340000-0x00000000058E4000-memory.dmp

Filesize
5.6MB

Download
memory/4964-139-0x00000000089B0000-0x0000000008A4C000-memory.dmp

Filesize
624KB

Download
memory/5012-157-0x0000000001220000-0x000000000123A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads