blustealer | 28be1b525319b02993d31a3d45330e8924f40b4ebeb8696a89bcd3333bea26d5

General

Target

Halkbank_Ekstre_20221003_081552_734629.exe
Size

856KB
MD5

e3c3961c460143a9ecf527e1821b89cc
SHA1

db1b4f8b3383eee78296cc69d3d101a2a23012ca
SHA256

28be1b525319b02993d31a3d45330e8924f40b4ebeb8696a89bcd3333bea26d5
SHA512

a439568155ebf0e85eee3104fe98e9001141f8a8e5178b7e011c5c24554b8eb8f2a734c60b68bea05bf9170fa3001a081a93233de2d2f5414e1b1f4e607c59c9
SSDEEP

12288:yPLQR/4veFNM4rKd3zIEEqBSP3JJxP7xINKJhJf3wZh:g+4vevrXH7P3vxP7xINOP

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5374342837:AAHF-c1HAIvNCdF89VuEdNggsL2YBlpgkSE/sendMessage?chat_id=2133303215

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/1016-74-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1016-75-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1016-77-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1016-79-0x0000000000090000-0x00000000000AA000-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 1812 set thread context of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 840 set thread context of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29

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 use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1016	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
840	Halkbank_Ekstre_20221003_081552_734629.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 1812 wrote to memory of 840	1812	Halkbank_Ekstre_20221003_081552_734629.exe	28
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29
PID 840 wrote to memory of 1016	840	Halkbank_Ekstre_20221003_081552_734629.exe	29

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\Halkbank_Ekstre_20221003_081552_734629.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221003_081552_734629.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1812
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221003_081552_734629.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20221003_081552_734629.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:840
- - 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:1016

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/840-63-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-82-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-81-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-68-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-60-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/840-61-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1016-72-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1016-74-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1016-77-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1016-79-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1812-59-0x0000000004C30000-0x0000000004C58000-memory.dmp

Filesize
160KB

Download
memory/1812-58-0x0000000007E80000-0x0000000007EFE000-memory.dmp

Filesize
504KB

Download
memory/1812-57-0x0000000000410000-0x000000000041C000-memory.dmp

Filesize
48KB

Download
memory/1812-54-0x0000000001140000-0x0000000001216000-memory.dmp

Filesize
856KB

Download
memory/1812-56-0x0000000000DA0000-0x0000000000DBC000-memory.dmp

Filesize
112KB

Download
memory/1812-55-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download

Analysis

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