blustealer | 5ca2237bf4f41e455bb122ec22e4ff1e4c8f19ab9df374d813bec103cf15c8b8

Analysis

max time kernel
126s
max time network
63s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
30-11-2022 20:09

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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

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 4 IoCs

resource	yara_rule
behavioral1/memory/1500-78-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1500-79-0x00000000000E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1500-81-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1500-83-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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
4	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1808 set thread context of 1744	1808	RFQ.exe	32
PID 1744 set thread context of 1500	1744	RFQ.exe	33

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
1360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1808	RFQ.exe
2020	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1744	RFQ.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1808	RFQ.exe
Token: SeDebugPrivilege	2020	powershell.exe
Token: SeDebugPrivilege	1500	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1744	RFQ.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 2020	1808	RFQ.exe	27
PID 1808 wrote to memory of 2020	1808	RFQ.exe	27
PID 1808 wrote to memory of 2020	1808	RFQ.exe	27
PID 1808 wrote to memory of 2020	1808	RFQ.exe	27
PID 1808 wrote to memory of 1360	1808	RFQ.exe	29
PID 1808 wrote to memory of 1360	1808	RFQ.exe	29
PID 1808 wrote to memory of 1360	1808	RFQ.exe	29
PID 1808 wrote to memory of 1360	1808	RFQ.exe	29
PID 1808 wrote to memory of 588	1808	RFQ.exe	31
PID 1808 wrote to memory of 588	1808	RFQ.exe	31
PID 1808 wrote to memory of 588	1808	RFQ.exe	31
PID 1808 wrote to memory of 588	1808	RFQ.exe	31
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1808 wrote to memory of 1744	1808	RFQ.exe	32
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33
PID 1744 wrote to memory of 1500	1744	RFQ.exe	33

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1808
- 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:2020
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\nUlGuWTjq" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC331.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1360
- C:\Users\Admin\AppData\Local\Temp\RFQ.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
  2⤵
  PID:588
- 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:1744
- - 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

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC331.tmp

Filesize
1KB

MD5
fb1a514eccfc8dd04e837acd63db95f0

SHA1
023e9352f6d691c2e96fbe61ff7e71deb9876a3b

SHA256
df64dffe413c9f749fc30826f79a3a034eec101e3638202d488322f6deba0dac

SHA512
17dc0b3d469d38b85cac2381069d4f1a420f486410c4f2d0ddabb2188f3b667b07ea02d6df738b8ac9814bd0c3f7b7be19cda51029afbb3559761be194e04b70

Download Submit
memory/1500-81-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1500-76-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1500-83-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1500-78-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1744-69-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-85-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-64-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-72-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-67-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-88-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1744-65-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1808-58-0x0000000004F80000-0x0000000004FE2000-memory.dmp

Filesize
392KB

Download
memory/1808-57-0x00000000006E0000-0x00000000006EE000-memory.dmp

Filesize
56KB

Download
memory/1808-63-0x00000000049B0000-0x00000000049DC000-memory.dmp

Filesize
176KB

Download
memory/1808-54-0x0000000000A30000-0x0000000000AE8000-memory.dmp

Filesize
736KB

Download
memory/1808-55-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

Filesize
8KB

Download
memory/1808-56-0x00000000006C0000-0x00000000006D6000-memory.dmp

Filesize
88KB

Download
memory/2020-86-0x000000006EE40000-0x000000006F3EB000-memory.dmp

Filesize
5.7MB

Download
memory/2020-87-0x000000006EE40000-0x000000006F3EB000-memory.dmp

Filesize
5.7MB

Download