blustealer | 34eff32a7aa0bf09e8913f112eea40f56f85d254889f429240cee5e89b11f634

General

Target

rfq#09234a.exe
Size

800KB
MD5

20397f2a5286e87f72a2b39edf048a89
SHA1

cdc0de28872b5fa612d6ef931465466b626d09b4
SHA256

e95541bc5dd30416ce2189fb79666814d4f236fdc67ab4dc3d69fd44c7e3a259
SHA512

b083acdb4806a6794eae2bdf6e9fe9a5538d4e7656cfe2163cc94c854ddee939cb46a417311d93757fd1ad991f408752f1e2c3ca6e4830944ca750d3c97287e2
SSDEEP

12288:Lzx1WrUdHL+NMvHRMieFKSb+oRo84x4GVP7ngG:XOgdiNGV7SbxpQ4GPL

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 4 IoCs

resource	yara_rule
behavioral1/memory/1688-74-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1688-75-0x00000000000E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1688-77-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/1688-79-0x00000000000D0000-0x00000000000EA000-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 1368 set thread context of 896	1368	rfq#09234a.exe	27
PID 896 set thread context of 1688	896	RegSvcs.exe	28

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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1688	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
896	RegSvcs.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 1368 wrote to memory of 896	1368	rfq#09234a.exe	27
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28
PID 896 wrote to memory of 1688	896	RegSvcs.exe	28

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#09234a.exe
"C:\Users\Admin\AppData\Local\Temp\rfq#09234a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1368
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:896
- - 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:1688

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/896-63-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-81-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-68-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-60-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/896-61-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1368-58-0x0000000005D90000-0x0000000005E0E000-memory.dmp

Filesize
504KB

Download
memory/1368-59-0x0000000004320000-0x0000000004348000-memory.dmp

Filesize
160KB

Download
memory/1368-54-0x0000000000AD0000-0x0000000000B9E000-memory.dmp

Filesize
824KB

Download
memory/1368-57-0x0000000000720000-0x000000000072C000-memory.dmp

Filesize
48KB

Download
memory/1368-56-0x0000000000550000-0x000000000056A000-memory.dmp

Filesize
104KB

Download
memory/1368-55-0x0000000074E41000-0x0000000074E43000-memory.dmp

Filesize
8KB

Download
memory/1688-72-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1688-74-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1688-77-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1688-79-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download

Analysis

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