blustealer | 4346e1523a778cd8a6a7a63a57668b6b14d238db58a0c9a43589533bbf183773

General

Target

5.exe
Size

891KB
MD5

fc5989f3d22dbbdecea721a3a149a584
SHA1

3d590bf3e2bcb6b6fb8d706421048793c1c3a295
SHA256

4346e1523a778cd8a6a7a63a57668b6b14d238db58a0c9a43589533bbf183773
SHA512

1441802146f4d3bd4f93a0d732fff7765e58bdcf7e8088270fb839a793b27839dab23e2781c2d5d281b0471c5e2b6a35aa7fa08808d1e343dd66d9d3a9f3db84
SSDEEP

24576:CZ5KTFD1E9g8V3Ee9Y5+CEm6pUXY+mzo3bv:E5KTFDka+i6glmzM

Score

10^/10

blustealer stormkitty collection 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 4 IoCs

resource	yara_rule
behavioral1/memory/568-75-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/568-76-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/568-78-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/568-80-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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 548 set thread context of 1344	548	5.exe	27
PID 1344 set thread context of 568	1344	5.exe	28

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
548	5.exe
548	5.exe
548	5.exe
548	5.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	548	5.exe
Token: SeDebugPrivilege	568	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1344	5.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 548 wrote to memory of 1344	548	5.exe	27
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28
PID 1344 wrote to memory of 568	1344	5.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\5.exe
"C:\Users\Admin\AppData\Local\Temp\5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:548
- C:\Users\Admin\AppData\Local\Temp\5.exe
  "C:\Users\Admin\AppData\Local\Temp\5.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1344
- - 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:568

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/548-55-0x0000000076831000-0x0000000076833000-memory.dmp

Filesize
8KB

Download
memory/548-56-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/548-57-0x0000000000420000-0x000000000042C000-memory.dmp

Filesize
48KB

Download
memory/548-58-0x0000000005030000-0x00000000050B0000-memory.dmp

Filesize
512KB

Download
memory/548-59-0x0000000002040000-0x0000000002068000-memory.dmp

Filesize
160KB

Download
memory/548-54-0x0000000000890000-0x0000000000976000-memory.dmp

Filesize
920KB

Download
memory/568-73-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/568-80-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/568-78-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/568-75-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1344-63-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-72-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-68-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-61-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-60-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1344-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download

Analysis

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