blustealer | b034103df2ee0d962c9e614fc8f54ddfee1b74a815a1af90e5f90b03db3f6bab

General

Target

BQaK.exe
Size

1.0MB
MD5

56ef7a3ec68e156065b4ca3a21b677c0
SHA1

1921d5a2f2d1094d57ed81cf0fb4f1972d5ec314
SHA256

b034103df2ee0d962c9e614fc8f54ddfee1b74a815a1af90e5f90b03db3f6bab
SHA512

4c5a5246a5f464cceaee9b000d21d3ae5aa88226ef6f0ab64e63ddbeacbfc302d017a472aaa89e4d0a52d40288f3c8219bf023f04e9a6978598728a1b2f413d1
SSDEEP

12288:0kNjmex1ahAd3gFuKlthapQXWtG6o/mFM+aG:0kxmeLdQjrGtho/EM+

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5468731092:AAGGNQWBVRhX622u6xp1moMhaunIGtXuIxg/sendMessage?chat_id=1639214896

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/584-74-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/584-75-0x00000000000E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/584-77-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty
behavioral1/memory/584-79-0x00000000000D0000-0x00000000000EA000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

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

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 1832 set thread context of 1136	1832	BQaK.exe	27
PID 1136 set thread context of 584	1136	BQaK.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 5 IoCs

pid	Process
1832	BQaK.exe
1832	BQaK.exe
1832	BQaK.exe
1832	BQaK.exe
1832	BQaK.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1832	BQaK.exe
Token: SeDebugPrivilege	584	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1136	BQaK.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1832 wrote to memory of 1136	1832	BQaK.exe	27
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.exe	28
PID 1136 wrote to memory of 584	1136	BQaK.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\BQaK.exe
"C:\Users\Admin\AppData\Local\Temp\BQaK.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1832
- C:\Users\Admin\AppData\Local\Temp\BQaK.exe
  "C:\Users\Admin\AppData\Local\Temp\BQaK.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1136
- - 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:584

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/584-72-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/584-79-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/584-77-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/584-74-0x00000000000D0000-0x00000000000EA000-memory.dmp

Filesize
104KB

Download
memory/1136-63-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-81-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-61-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-68-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1136-60-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1832-59-0x0000000005090000-0x00000000050D0000-memory.dmp

Filesize
256KB

Download
memory/1832-57-0x00000000005C0000-0x00000000005CC000-memory.dmp

Filesize
48KB

Download
memory/1832-56-0x00000000005A0000-0x00000000005BA000-memory.dmp

Filesize
104KB

Download
memory/1832-55-0x0000000076401000-0x0000000076403000-memory.dmp

Filesize
8KB

Download
memory/1832-58-0x0000000006100000-0x0000000006196000-memory.dmp

Filesize
600KB

Download
memory/1832-54-0x0000000000A10000-0x0000000000B1C000-memory.dmp

Filesize
1.0MB

Download

Analysis

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