blustealer | 7dbd595dd8e5d4dda3c0127e8779342c42432e27ff37ac482fca8e0c8aef32a8

General

Target

Halkbank_Ekstre_003_170635_650186.pdf.exe
Size

884KB
MD5

a7b72a295326ac2c29592434237f445c
SHA1

bcd8ffed67e7276a1799f0eba8af373cfaf39d5e
SHA256

7dbd595dd8e5d4dda3c0127e8779342c42432e27ff37ac482fca8e0c8aef32a8
SHA512

b06780ed1ceb88db634eb7b64db7e448fccb36f3e94bc35dff877c4d1db4692cc3e2fbad2b0be8f1e3c882d03b58d4363f770492bb24b1833823ad9961d64597
SSDEEP

12288:X27t+T/R/4ve4mPyLyIS8mmKVki7vkZxB6hCHevhphU:Jt4ve4mPy+IKBVk+k7B6M+JphU

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/684-79-0x00000000001E4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/684-78-0x00000000001D0000-0x00000000001EA000-memory.dmp	family_stormkitty
behavioral1/memory/684-81-0x00000000001D0000-0x00000000001EA000-memory.dmp	family_stormkitty
behavioral1/memory/684-83-0x00000000001D0000-0x00000000001EA000-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\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
Key opened	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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
4	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1256 set thread context of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1064 set thread context of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31

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

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1196	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
1896	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe
Token: SeDebugPrivilege	1896	powershell.exe
Token: SeDebugPrivilege	684	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1064	Halkbank_Ekstre_003_170635_650186.pdf.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1256 wrote to memory of 1896	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	26
PID 1256 wrote to memory of 1896	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	26
PID 1256 wrote to memory of 1896	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	26
PID 1256 wrote to memory of 1896	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	26
PID 1256 wrote to memory of 1196	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	28
PID 1256 wrote to memory of 1196	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	28
PID 1256 wrote to memory of 1196	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	28
PID 1256 wrote to memory of 1196	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	28
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1256 wrote to memory of 1064	1256	Halkbank_Ekstre_003_170635_650186.pdf.exe	30
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31
PID 1064 wrote to memory of 684	1064	Halkbank_Ekstre_003_170635_650186.pdf.exe	31

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\Halkbank_Ekstre_003_170635_650186.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WldQizw.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1896
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WldQizw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC41.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1196
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1064
- - 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:684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC41.tmp

Filesize
1KB

MD5
2f1dc3fa36615907e9a0a42bfcb72355

SHA1
07a4f5898d932f433e83798c6a4897b5b0eaa854

SHA256
ce020dd43119defca2371174a85aee42a4838cf3c8f1a0906fc42a9fddae67a8

SHA512
45dc14786a6854bf966f6108d807dffbf950ca7ffa33bd7e763bc39325eef1e00379ee69669d7e9972b0150410a18e69a51165670ccca2e480a94dd2dced89be

Download Submit
memory/684-83-0x00000000001D0000-0x00000000001EA000-memory.dmp

Filesize
104KB

Download
memory/684-81-0x00000000001D0000-0x00000000001EA000-memory.dmp

Filesize
104KB

Download
memory/684-78-0x00000000001D0000-0x00000000001EA000-memory.dmp

Filesize
104KB

Download
memory/684-76-0x00000000001D0000-0x00000000001EA000-memory.dmp

Filesize
104KB

Download
memory/1064-69-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-88-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-64-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-67-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-85-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1064-72-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1256-55-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1256-58-0x00000000054C0000-0x000000000553E000-memory.dmp

Filesize
504KB

Download
memory/1256-57-0x00000000005A0000-0x00000000005AC000-memory.dmp

Filesize
48KB

Download
memory/1256-56-0x0000000000540000-0x000000000055C000-memory.dmp

Filesize
112KB

Download
memory/1256-54-0x0000000000E40000-0x0000000000F24000-memory.dmp

Filesize
912KB

Download
memory/1256-63-0x0000000004630000-0x0000000004658000-memory.dmp

Filesize
160KB

Download
memory/1896-86-0x000000006E900000-0x000000006EEAB000-memory.dmp

Filesize
5.7MB

Download
memory/1896-87-0x000000006E900000-0x000000006EEAB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads