blustealer | 7ef5048ef8956ea47d94d2498c6bba66c7c33dbc8e2f5ed4d879ea96af30b682

General

Target

PO 7500093232.exe
Size

482KB
MD5

832efb6bf9f508ebb2c41257fadcc300
SHA1

1e8667e1561c3411f42f98c494dcc99be36d6d6a
SHA256

f9bc0d5860d6135dab48b897e55465d88ebd0ca9b73ebdbaf83957d6e3bee26f
SHA512

f866c97b78b006891b34b5afa8f0d3e3a8bf0e7033ab8970e142427e2611f07127fb3661bec26d43e0f68aa9e19aa8932adc2fb296cf1cdfdd85dd2b72eb30ea

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 1 IoCs

resource	yara_rule
behavioral2/memory/5056-142-0x00000000007A0000-0x00000000007BA000-memory.dmp	family_stormkitty

Downloads MZ/PE file

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aLFDxEdS.lnk	PO 7500093232.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\15.0\Outlook\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
32	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4720 set thread context of 4112	4720	PO 7500093232.exe	81
PID 4112 set thread context of 5056	4112	PO 7500093232.exe	82

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	AppLaunch.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4720	PO 7500093232.exe
Token: SeDebugPrivilege	5056	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4112	PO 7500093232.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4720 wrote to memory of 4112	4720	PO 7500093232.exe	81
PID 4112 wrote to memory of 5056	4112	PO 7500093232.exe	82
PID 4112 wrote to memory of 5056	4112	PO 7500093232.exe	82
PID 4112 wrote to memory of 5056	4112	PO 7500093232.exe	82
PID 4112 wrote to memory of 5056	4112	PO 7500093232.exe	82
PID 4112 wrote to memory of 5056	4112	PO 7500093232.exe	82

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PO 7500093232.exe
"C:\Users\Admin\AppData\Local\Temp\PO 7500093232.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4720
- C:\Users\Admin\AppData\Local\Temp\PO 7500093232.exe
  "C:\Users\Admin\AppData\Local\Temp\PO 7500093232.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4112
- - 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:5056

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/4112-145-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4112-144-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4112-138-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4112-136-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4720-133-0x0000000005630000-0x00000000056CC000-memory.dmp

Filesize
624KB

Download
memory/4720-134-0x0000000005510000-0x000000000551A000-memory.dmp

Filesize
40KB

Download
memory/4720-130-0x0000000000C30000-0x0000000000CAE000-memory.dmp

Filesize
504KB

Download
memory/4720-132-0x0000000005590000-0x0000000005622000-memory.dmp

Filesize
584KB

Download
memory/4720-131-0x0000000005B40000-0x00000000060E4000-memory.dmp

Filesize
5.6MB

Download
memory/5056-142-0x00000000007A0000-0x00000000007BA000-memory.dmp

Filesize
104KB

Download
memory/5056-143-0x0000000004BF0000-0x0000000004C56000-memory.dmp

Filesize
408KB

Download

Analysis

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