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 1 IoCs

resource	yara_rule
behavioral2/memory/5032-153-0x0000000000F40000-0x0000000000F5A000-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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Halkbank_Ekstre_003_170635_650186.pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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
33	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4356 set thread context of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 2940 set thread context of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94

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
1464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
4468	powershell.exe
4468	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe
Token: SeDebugPrivilege	4468	powershell.exe
Token: SeDebugPrivilege	5032	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2940	Halkbank_Ekstre_003_170635_650186.pdf.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 4468	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	89
PID 4356 wrote to memory of 4468	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	89
PID 4356 wrote to memory of 4468	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	89
PID 4356 wrote to memory of 1464	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	91
PID 4356 wrote to memory of 1464	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	91
PID 4356 wrote to memory of 1464	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	91
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 4356 wrote to memory of 2940	4356	Halkbank_Ekstre_003_170635_650186.pdf.exe	93
PID 2940 wrote to memory of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2940 wrote to memory of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2940 wrote to memory of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2940 wrote to memory of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2940 wrote to memory of 5032	2940	Halkbank_Ekstre_003_170635_650186.pdf.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4356
- 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:4468
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WldQizw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3DE4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1464
- 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:2940
- - 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:5032

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\tmp3DE4.tmp

Filesize
1KB

MD5
6985034597bd8bac95d1dfbb1338fd3b

SHA1
2a3f93df15a4132b0ec34ade9894d577168100b7

SHA256
a641537242c714b28be9a10c20db72e0718c95e7320685a0b0302ed6dccea70c

SHA512
8b9d871a6ea051e1bc30ac05e0c1ebac0e66e79543857c0e3ea4d1ce0790e776b00b20528b5eb0f52e611fd7241db80fc0b562cf3d453f2c35a0775db7524708

Download Submit
memory/2940-165-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2940-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2940-151-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2940-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4356-135-0x0000000005980000-0x000000000598A000-memory.dmp

Filesize
40KB

Download
memory/4356-136-0x00000000095D0000-0x000000000966C000-memory.dmp

Filesize
624KB

Download
memory/4356-137-0x0000000009920000-0x0000000009986000-memory.dmp

Filesize
408KB

Download
memory/4356-134-0x0000000005990000-0x0000000005A22000-memory.dmp

Filesize
584KB

Download
memory/4356-133-0x0000000005EA0000-0x0000000006444000-memory.dmp

Filesize
5.6MB

Download
memory/4356-132-0x0000000000F10000-0x0000000000FF4000-memory.dmp

Filesize
912KB

Download
memory/4468-148-0x0000000005600000-0x0000000005622000-memory.dmp

Filesize
136KB

Download
memory/4468-161-0x0000000007C60000-0x0000000007CF6000-memory.dmp

Filesize
600KB

Download
memory/4468-150-0x00000000057A0000-0x0000000005806000-memory.dmp

Filesize
408KB

Download
memory/4468-140-0x0000000005120000-0x0000000005156000-memory.dmp

Filesize
216KB

Download
memory/4468-164-0x0000000007D00000-0x0000000007D08000-memory.dmp

Filesize
32KB

Download
memory/4468-154-0x00000000066E0000-0x00000000066FE000-memory.dmp

Filesize
120KB

Download
memory/4468-155-0x00000000076D0000-0x0000000007702000-memory.dmp

Filesize
200KB

Download
memory/4468-156-0x00000000704F0000-0x000000007053C000-memory.dmp

Filesize
304KB

Download
memory/4468-157-0x0000000006C90000-0x0000000006CAE000-memory.dmp

Filesize
120KB

Download
memory/4468-158-0x0000000008040000-0x00000000086BA000-memory.dmp

Filesize
6.5MB

Download
memory/4468-159-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/4468-160-0x0000000007A50000-0x0000000007A5A000-memory.dmp

Filesize
40KB

Download
memory/4468-144-0x0000000005840000-0x0000000005E68000-memory.dmp

Filesize
6.2MB

Download
memory/4468-162-0x0000000007C10000-0x0000000007C1E000-memory.dmp

Filesize
56KB

Download
memory/4468-163-0x0000000007D20000-0x0000000007D3A000-memory.dmp

Filesize
104KB

Download
memory/5032-153-0x0000000000F40000-0x0000000000F5A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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