blustealer | 6ff066e95b854da5bfe48955274affbeb085e793afd3e03d8af349fee6f83fee

Analysis

max time kernel
145s
max time network
77s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
22-09-2022 15:09

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General

Target

Halkbank_Ekstre_073809_405251.pdf.exe
Size

836KB
MD5

01f58e5b211ab808d34246331dd88805
SHA1

0d4b53c0d2a62472349588558cb61b4129df1840
SHA256

6ff066e95b854da5bfe48955274affbeb085e793afd3e03d8af349fee6f83fee
SHA512

92464e6ecec15532836bbf88087d055a2cc0589ea7ee66b8d5aefd1f57c0760fab207569fbc4b1a213a76227b9983e274821e65c71fef11a64557988a9ee81a1
SSDEEP

12288:RtuTkRe+uPuzDMrKyCaqrSFj2mUenlTVnv6jTz+bsGwJJi0lttl2i:QywuUrKyCdwj2mUepVnyjTazwO0z7N

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot5472661190:AAH0_Es3-7EvHKo3diARLmBSPyMQ64sYLC8/sendMessage?chat_id=1148000519

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/1456-78-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1456-79-0x00000000000A4F6E-mapping.dmp	family_stormkitty
behavioral1/memory/1456-81-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/1456-83-0x0000000000090000-0x00000000000AA000-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 1280 set thread context of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 592 set thread context of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35

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
1136	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1280	Halkbank_Ekstre_073809_405251.pdf.exe
1328	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1280	Halkbank_Ekstre_073809_405251.pdf.exe
Token: SeDebugPrivilege	1328	powershell.exe
Token: SeDebugPrivilege	1456	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
592	Halkbank_Ekstre_073809_405251.pdf.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1280 wrote to memory of 1328	1280	Halkbank_Ekstre_073809_405251.pdf.exe	28
PID 1280 wrote to memory of 1328	1280	Halkbank_Ekstre_073809_405251.pdf.exe	28
PID 1280 wrote to memory of 1328	1280	Halkbank_Ekstre_073809_405251.pdf.exe	28
PID 1280 wrote to memory of 1328	1280	Halkbank_Ekstre_073809_405251.pdf.exe	28
PID 1280 wrote to memory of 1136	1280	Halkbank_Ekstre_073809_405251.pdf.exe	30
PID 1280 wrote to memory of 1136	1280	Halkbank_Ekstre_073809_405251.pdf.exe	30
PID 1280 wrote to memory of 1136	1280	Halkbank_Ekstre_073809_405251.pdf.exe	30
PID 1280 wrote to memory of 1136	1280	Halkbank_Ekstre_073809_405251.pdf.exe	30
PID 1280 wrote to memory of 1764	1280	Halkbank_Ekstre_073809_405251.pdf.exe	32
PID 1280 wrote to memory of 1764	1280	Halkbank_Ekstre_073809_405251.pdf.exe	32
PID 1280 wrote to memory of 1764	1280	Halkbank_Ekstre_073809_405251.pdf.exe	32
PID 1280 wrote to memory of 1764	1280	Halkbank_Ekstre_073809_405251.pdf.exe	32
PID 1280 wrote to memory of 584	1280	Halkbank_Ekstre_073809_405251.pdf.exe	33
PID 1280 wrote to memory of 584	1280	Halkbank_Ekstre_073809_405251.pdf.exe	33
PID 1280 wrote to memory of 584	1280	Halkbank_Ekstre_073809_405251.pdf.exe	33
PID 1280 wrote to memory of 584	1280	Halkbank_Ekstre_073809_405251.pdf.exe	33
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 1280 wrote to memory of 592	1280	Halkbank_Ekstre_073809_405251.pdf.exe	34
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35
PID 592 wrote to memory of 1456	592	Halkbank_Ekstre_073809_405251.pdf.exe	35

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_073809_405251.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1280
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\YiwBwZhEKchkYw.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1328
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YiwBwZhEKchkYw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD0F6.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1136
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe"
  2⤵
  PID:1764
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe"
  2⤵
  PID:584
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_073809_405251.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:592
- - 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:1456

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpD0F6.tmp

Filesize
1KB

MD5
fb5674ae8a79353153a40445b9fd9eb1

SHA1
e6d7f167e74b2ee356e062d431ce5e35e7c9e3ea

SHA256
cf4e9002b9b4798a0aac8981a116207576c667751f910a450cffc163de823f40

SHA512
47d5975af0a193f538ba3f8079d38eb3256e31f1d337e652affecee13a8d888297dc69b5fbd77061395c08338678719c08ed7b80f8b9cb37171735e09bc4146b

Download Submit
memory/592-64-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-88-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-85-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-72-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-69-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-67-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/592-65-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1280-56-0x00000000002E0000-0x00000000002F4000-memory.dmp

Filesize
80KB

Download
memory/1280-54-0x0000000000130000-0x0000000000208000-memory.dmp

Filesize
864KB

Download
memory/1280-58-0x0000000005E10000-0x0000000005E8E000-memory.dmp

Filesize
504KB

Download
memory/1280-57-0x0000000000300000-0x000000000030C000-memory.dmp

Filesize
48KB

Download
memory/1280-55-0x0000000075811000-0x0000000075813000-memory.dmp

Filesize
8KB

Download
memory/1280-63-0x00000000049E0000-0x0000000004A08000-memory.dmp

Filesize
160KB

Download
memory/1328-87-0x000000006E5F0000-0x000000006EB9B000-memory.dmp

Filesize
5.7MB

Download
memory/1328-86-0x000000006E5F0000-0x000000006EB9B000-memory.dmp

Filesize
5.7MB

Download
memory/1456-78-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1456-83-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1456-81-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/1456-76-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download