blustealer | e8ec1e6c646cf6e7b9e8889ac902ec1facecc6d45236ceb0a3b0975d8aa13bfa

General

Target

Halkbank,doc.exe
Size

104KB
MD5

eca5a273c2fd8d32e35a4af273064d5c
SHA1

4dac9c2e6069f1007fab5f25e1f69be3310f6152
SHA256

e8ec1e6c646cf6e7b9e8889ac902ec1facecc6d45236ceb0a3b0975d8aa13bfa
SHA512

0e1c7c4587ebe29b5107e95f14d1ba8d1e784763012b7497552cfbfe6e269988f246a42ffabced99d7c5dde7e4a103691d6a6d62493c5d8bfbe037a881fa9182
SSDEEP

1536:R1otmQi3h2Ovt0Yo++vw/18AyMMK4MIyp:R2twxOYo+mwNJb4MIyp

Score

10^/10

blustealer stormkitty collection persistence 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/4996-150-0x00000000011B0000-0x00000000011CA000-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,doc.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\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
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Onumby = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ceusn\\Onumby.exe\""	Halkbank,doc.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
28	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2828 set thread context of 3804	2828	Halkbank,doc.exe	92
PID 3804 set thread context of 4996	3804	Halkbank,doc.exe	93

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 behavior: EnumeratesProcesses 4 IoCs

pid	Process
2288	powershell.exe
2288	powershell.exe
2828	Halkbank,doc.exe
2828	Halkbank,doc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2828	Halkbank,doc.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeDebugPrivilege	4996	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3804	Halkbank,doc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 2288	2828	Halkbank,doc.exe	83
PID 2828 wrote to memory of 2288	2828	Halkbank,doc.exe	83
PID 2828 wrote to memory of 2288	2828	Halkbank,doc.exe	83
PID 2828 wrote to memory of 3808	2828	Halkbank,doc.exe	91
PID 2828 wrote to memory of 3808	2828	Halkbank,doc.exe	91
PID 2828 wrote to memory of 3808	2828	Halkbank,doc.exe	91
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 2828 wrote to memory of 3804	2828	Halkbank,doc.exe	92
PID 3804 wrote to memory of 4996	3804	Halkbank,doc.exe	93
PID 3804 wrote to memory of 4996	3804	Halkbank,doc.exe	93
PID 3804 wrote to memory of 4996	3804	Halkbank,doc.exe	93
PID 3804 wrote to memory of 4996	3804	Halkbank,doc.exe	93
PID 3804 wrote to memory of 4996	3804	Halkbank,doc.exe	93

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,doc.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank,doc.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2288
- C:\Users\Admin\AppData\Local\Temp\Halkbank,doc.exe
  C:\Users\Admin\AppData\Local\Temp\Halkbank,doc.exe
  2⤵
  PID:3808
- C:\Users\Admin\AppData\Local\Temp\Halkbank,doc.exe
  C:\Users\Admin\AppData\Local\Temp\Halkbank,doc.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3804
- - 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:4996

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2288-140-0x0000000007650000-0x0000000007CCA000-memory.dmp

Filesize
6.5MB

Download
memory/2288-141-0x0000000006500000-0x000000000651A000-memory.dmp

Filesize
104KB

Download
memory/2288-135-0x00000000026C0000-0x00000000026F6000-memory.dmp

Filesize
216KB

Download
memory/2288-136-0x0000000005400000-0x0000000005A28000-memory.dmp

Filesize
6.2MB

Download
memory/2288-137-0x0000000005250000-0x00000000052B6000-memory.dmp

Filesize
408KB

Download
memory/2288-138-0x0000000005370000-0x00000000053D6000-memory.dmp

Filesize
408KB

Download
memory/2288-139-0x0000000006010000-0x000000000602E000-memory.dmp

Filesize
120KB

Download
memory/2828-133-0x0000000007140000-0x0000000007162000-memory.dmp

Filesize
136KB

Download
memory/2828-132-0x00000000008B0000-0x00000000008D0000-memory.dmp

Filesize
128KB

Download
memory/3804-152-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3804-144-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3804-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4996-150-0x00000000011B0000-0x00000000011CA000-memory.dmp

Filesize
104KB

Download
memory/4996-151-0x0000000005F80000-0x000000000601C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads