blustealer | c68294e867c285f5ec14441b9af0ac662a3b71822ee9432d82e6dd07e41778a7

General

Target

doc20220901 0200222 -0222.PDF.exe
Size

23KB
MD5

9ff132c364661e1139e8064c536ca67e
SHA1

e5c18362018b99ae688bdecd77c333c3088673a6
SHA256

c68294e867c285f5ec14441b9af0ac662a3b71822ee9432d82e6dd07e41778a7
SHA512

7629d709e8d871b43bfa8bd6bba36fcc09ca01658ffc23e04acec067c20c93615d9e4da43a0cced044e0e5d78d05615627176bdd60efb1d259ccb184ec71a03f
SSDEEP

384:hDBL3eKUFxi7RRLRIILxEUaNePqRpimmtIEQ675TKn8Svod2JzFlXYmnZzjcNrb1:hDBLaxi7RRNvLxOzRphL6lu8SvoYym0l

Score

10^/10

blustealer stormkitty collection persistence stealer

Malware Config

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/4204-153-0x0000000000DD0000-0x0000000000DEA000-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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	doc20220901 0200222 -0222.PDF.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\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-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Lbytilyy = "\"C:\\Users\\Admin\\AppData\\Roaming\\Cpxig\\Lbytilyy.exe\""	doc20220901 0200222 -0222.PDF.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
40	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4300 set thread context of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 2464 set thread context of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97

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
4852	powershell.exe
4852	powershell.exe
4300	doc20220901 0200222 -0222.PDF.exe
4300	doc20220901 0200222 -0222.PDF.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2464	doc20220901 0200222 -0222.PDF.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	doc20220901 0200222 -0222.PDF.exe
Token: SeDebugPrivilege	4852	powershell.exe
Token: SeDebugPrivilege	4204	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2464	doc20220901 0200222 -0222.PDF.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 4852	4300	doc20220901 0200222 -0222.PDF.exe	88
PID 4300 wrote to memory of 4852	4300	doc20220901 0200222 -0222.PDF.exe	88
PID 4300 wrote to memory of 4852	4300	doc20220901 0200222 -0222.PDF.exe	88
PID 4300 wrote to memory of 2708	4300	doc20220901 0200222 -0222.PDF.exe	94
PID 4300 wrote to memory of 2708	4300	doc20220901 0200222 -0222.PDF.exe	94
PID 4300 wrote to memory of 2708	4300	doc20220901 0200222 -0222.PDF.exe	94
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 4300 wrote to memory of 2464	4300	doc20220901 0200222 -0222.PDF.exe	95
PID 2464 wrote to memory of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97
PID 2464 wrote to memory of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97
PID 2464 wrote to memory of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97
PID 2464 wrote to memory of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97
PID 2464 wrote to memory of 4204	2464	doc20220901 0200222 -0222.PDF.exe	97

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.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:4300
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4852
- C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.exe"
  2⤵
  PID:2708
- C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\doc20220901 0200222 -0222.PDF.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2464
- - 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:4204

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

Replay Monitor

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Downloads

memory/2464-146-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2464-148-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2464-155-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2464-151-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4204-154-0x0000000005CB0000-0x0000000005D4C000-memory.dmp

Filesize
624KB

Download
memory/4204-153-0x0000000000DD0000-0x0000000000DEA000-memory.dmp

Filesize
104KB

Download
memory/4300-132-0x0000000000FD0000-0x0000000000FDC000-memory.dmp

Filesize
48KB

Download
memory/4300-135-0x0000000006760000-0x0000000006782000-memory.dmp

Filesize
136KB

Download
memory/4300-134-0x00000000067C0000-0x0000000006852000-memory.dmp

Filesize
584KB

Download
memory/4300-133-0x0000000006C70000-0x0000000007214000-memory.dmp

Filesize
5.6MB

Download
memory/4852-137-0x0000000004F90000-0x0000000004FC6000-memory.dmp

Filesize
216KB

Download
memory/4852-143-0x0000000006A70000-0x0000000006A8A000-memory.dmp

Filesize
104KB

Download
memory/4852-142-0x0000000007DD0000-0x000000000844A000-memory.dmp

Filesize
6.5MB

Download
memory/4852-141-0x0000000006570000-0x000000000658E000-memory.dmp

Filesize
120KB

Download
memory/4852-140-0x0000000005EF0000-0x0000000005F56000-memory.dmp

Filesize
408KB

Download
memory/4852-139-0x0000000005E80000-0x0000000005EE6000-memory.dmp

Filesize
408KB

Download
memory/4852-138-0x0000000005660000-0x0000000005C88000-memory.dmp

Filesize
6.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads