blustealer | 6ff066e95b854da5bfe48955274affbeb085e793afd3e03d8af349fee6f83fee

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

C2

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 1 IoCs

resource	yara_rule
behavioral2/memory/4360-161-0x00000000001E0000-0x00000000001FA000-memory.dmp	family_stormkitty

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	Halkbank_Ekstre_073809_405251.pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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
41	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4084 set thread context of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 3256 set thread context of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95

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
2100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
4084	Halkbank_Ekstre_073809_405251.pdf.exe
3608	powershell.exe
3608	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4084	Halkbank_Ekstre_073809_405251.pdf.exe
Token: SeDebugPrivilege	3608	powershell.exe
Token: SeDebugPrivilege	4360	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3256	Halkbank_Ekstre_073809_405251.pdf.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 4084 wrote to memory of 3608	4084	Halkbank_Ekstre_073809_405251.pdf.exe	88
PID 4084 wrote to memory of 3608	4084	Halkbank_Ekstre_073809_405251.pdf.exe	88
PID 4084 wrote to memory of 3608	4084	Halkbank_Ekstre_073809_405251.pdf.exe	88
PID 4084 wrote to memory of 2100	4084	Halkbank_Ekstre_073809_405251.pdf.exe	90
PID 4084 wrote to memory of 2100	4084	Halkbank_Ekstre_073809_405251.pdf.exe	90
PID 4084 wrote to memory of 2100	4084	Halkbank_Ekstre_073809_405251.pdf.exe	90
PID 4084 wrote to memory of 1088	4084	Halkbank_Ekstre_073809_405251.pdf.exe	92
PID 4084 wrote to memory of 1088	4084	Halkbank_Ekstre_073809_405251.pdf.exe	92
PID 4084 wrote to memory of 1088	4084	Halkbank_Ekstre_073809_405251.pdf.exe	92
PID 4084 wrote to memory of 444	4084	Halkbank_Ekstre_073809_405251.pdf.exe	93
PID 4084 wrote to memory of 444	4084	Halkbank_Ekstre_073809_405251.pdf.exe	93
PID 4084 wrote to memory of 444	4084	Halkbank_Ekstre_073809_405251.pdf.exe	93
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 4084 wrote to memory of 3256	4084	Halkbank_Ekstre_073809_405251.pdf.exe	94
PID 3256 wrote to memory of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95
PID 3256 wrote to memory of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95
PID 3256 wrote to memory of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95
PID 3256 wrote to memory of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95
PID 3256 wrote to memory of 4360	3256	Halkbank_Ekstre_073809_405251.pdf.exe	95

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4084
- 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:3608
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YiwBwZhEKchkYw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA410.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2100
- 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:1088
- 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:444
- 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:3256
- - 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:4360

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

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpA410.tmp

Filesize
1KB

MD5
96796713f6f00d28846b0b43b48e3ac1

SHA1
8e829b180d98fe6c8bb62b8db8da7ed18724b367

SHA256
0f354ca285c8eb75c647f457be904310c8d80734f2354b83bfbb6049a3c876aa

SHA512
00da0d1e8307f8edaca322c8ca45f98f2a57bd66a49b03b5e75507cebd75109b19dd23668d16d1619d5c5caf7e17a9688c94b5eeb96bcf712d8207b494b7c4c5

Download Submit
memory/3256-166-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3256-150-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3256-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3608-149-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/3608-159-0x0000000007980000-0x000000000798A000-memory.dmp

Filesize
40KB

Download
memory/3608-142-0x0000000005840000-0x0000000005E68000-memory.dmp

Filesize
6.2MB

Download
memory/3608-165-0x0000000007C20000-0x0000000007C28000-memory.dmp

Filesize
32KB

Download
memory/3608-164-0x0000000007C40000-0x0000000007C5A000-memory.dmp

Filesize
104KB

Download
memory/3608-163-0x0000000007B30000-0x0000000007B3E000-memory.dmp

Filesize
56KB

Download
memory/3608-147-0x0000000005530000-0x0000000005552000-memory.dmp

Filesize
136KB

Download
memory/3608-162-0x0000000007B80000-0x0000000007C16000-memory.dmp

Filesize
600KB

Download
memory/3608-140-0x0000000002CC0000-0x0000000002CF6000-memory.dmp

Filesize
216KB

Download
memory/3608-153-0x00000000065F0000-0x000000000660E000-memory.dmp

Filesize
120KB

Download
memory/3608-154-0x0000000006BC0000-0x0000000006BF2000-memory.dmp

Filesize
200KB

Download
memory/3608-155-0x0000000070570000-0x00000000705BC000-memory.dmp

Filesize
304KB

Download
memory/3608-156-0x0000000006BA0000-0x0000000006BBE000-memory.dmp

Filesize
120KB

Download
memory/3608-157-0x0000000007F50000-0x00000000085CA000-memory.dmp

Filesize
6.5MB

Download
memory/3608-158-0x0000000007900000-0x000000000791A000-memory.dmp

Filesize
104KB

Download
memory/4084-134-0x0000000004FE0000-0x0000000005072000-memory.dmp

Filesize
584KB

Download
memory/4084-132-0x00000000004E0000-0x00000000005B8000-memory.dmp

Filesize
864KB

Download
memory/4084-135-0x0000000004F70000-0x0000000004F7A000-memory.dmp

Filesize
40KB

Download
memory/4084-136-0x0000000008C40000-0x0000000008CDC000-memory.dmp

Filesize
624KB

Download
memory/4084-137-0x0000000000E70000-0x0000000000ED6000-memory.dmp

Filesize
408KB

Download
memory/4084-133-0x00000000054F0000-0x0000000005A94000-memory.dmp

Filesize
5.6MB

Download
memory/4360-161-0x00000000001E0000-0x00000000001FA000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads