blustealer | 9111218e89daf7e547af7777d2cde1fe35e029c1eff85f991349308a51af3d3d

General

Target

18112022365.scr.exe
Size

229KB
MD5

2c948d99fb2c74bc2e1065a83c9ac423
SHA1

5e6443132bb31fff16d94f823bc3df467de8dc84
SHA256

9111218e89daf7e547af7777d2cde1fe35e029c1eff85f991349308a51af3d3d
SHA512

6fffcc394750b99a57f438eef410333b941ced543126b2aa69ceade7b56136742104aeada34a46b7dfe090184ced384975a14b71721718c3d87ea3ccd00f3fab
SSDEEP

3072:F0k+T6gqPPIvuvHQFpaIYkKEPIFJzE17vt:F59HsaIYkb

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/544-153-0x0000000000800000-0x000000000081A000-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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	18112022365.scr.exe

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

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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mhpsyw = "\"C:\\Users\\Admin\\AppData\\Roaming\\Uzgludktxlq\\Mhpsyw.exe\""	18112022365.scr.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
29	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4736 set thread context of 3584	4736	18112022365.scr.exe	83
PID 3584 set thread context of 544	3584	18112022365.scr.exe	84

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 4 IoCs

pid	Process
5092	powershell.exe
5092	powershell.exe
4736	18112022365.scr.exe
4736	18112022365.scr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3584	18112022365.scr.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4736	18112022365.scr.exe
Token: SeDebugPrivilege	5092	powershell.exe
Token: SeDebugPrivilege	544	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3584	18112022365.scr.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 5092	4736	18112022365.scr.exe	79
PID 4736 wrote to memory of 5092	4736	18112022365.scr.exe	79
PID 4736 wrote to memory of 5092	4736	18112022365.scr.exe	79
PID 4736 wrote to memory of 1644	4736	18112022365.scr.exe	82
PID 4736 wrote to memory of 1644	4736	18112022365.scr.exe	82
PID 4736 wrote to memory of 1644	4736	18112022365.scr.exe	82
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 4736 wrote to memory of 3584	4736	18112022365.scr.exe	83
PID 3584 wrote to memory of 544	3584	18112022365.scr.exe	84
PID 3584 wrote to memory of 544	3584	18112022365.scr.exe	84
PID 3584 wrote to memory of 544	3584	18112022365.scr.exe	84
PID 3584 wrote to memory of 544	3584	18112022365.scr.exe	84
PID 3584 wrote to memory of 544	3584	18112022365.scr.exe	84

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\18112022365.scr.exe
"C:\Users\Admin\AppData\Local\Temp\18112022365.scr.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4736
- 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:5092
- C:\Users\Admin\AppData\Local\Temp\18112022365.scr.exe
  C:\Users\Admin\AppData\Local\Temp\18112022365.scr.exe
  2⤵
  PID:1644
- C:\Users\Admin\AppData\Local\Temp\18112022365.scr.exe
  C:\Users\Admin\AppData\Local\Temp\18112022365.scr.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3584
- - 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:544

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/544-155-0x00000000054F0000-0x000000000558C000-memory.dmp

Filesize
624KB

Download
memory/544-153-0x0000000000800000-0x000000000081A000-memory.dmp

Filesize
104KB

Download
memory/3584-156-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3584-154-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3584-149-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3584-147-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4736-132-0x0000000000FC0000-0x0000000000FFE000-memory.dmp

Filesize
248KB

Download
memory/4736-136-0x000000000B460000-0x000000000B482000-memory.dmp

Filesize
136KB

Download
memory/4736-135-0x0000000005B50000-0x0000000005B5A000-memory.dmp

Filesize
40KB

Download
memory/4736-134-0x0000000005990000-0x0000000005A22000-memory.dmp

Filesize
584KB

Download
memory/4736-133-0x0000000005FF0000-0x0000000006594000-memory.dmp

Filesize
5.6MB

Download
memory/5092-144-0x0000000006610000-0x000000000662A000-memory.dmp

Filesize
104KB

Download
memory/5092-143-0x0000000007760000-0x0000000007DDA000-memory.dmp

Filesize
6.5MB

Download
memory/5092-142-0x0000000006110000-0x000000000612E000-memory.dmp

Filesize
120KB

Download
memory/5092-141-0x0000000005AA0000-0x0000000005B06000-memory.dmp

Filesize
408KB

Download
memory/5092-140-0x0000000005A30000-0x0000000005A96000-memory.dmp

Filesize
408KB

Download
memory/5092-139-0x0000000005290000-0x00000000058B8000-memory.dmp

Filesize
6.2MB

Download
memory/5092-138-0x0000000004B30000-0x0000000004B66000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads