blustealer | ec8fddcd3c310a14168754ee1965cfb5c7d7c86360a146c1da4c042afb551dda

General

Target

Halkbank,.pdf.exe
Size

628KB
MD5

a63e6e9c58e82cce53442ebacb9fb399
SHA1

b82363c41eea39a1db51c2ac9bff713dfac171e7
SHA256

ec8fddcd3c310a14168754ee1965cfb5c7d7c86360a146c1da4c042afb551dda
SHA512

a69cb143ca04b34657421ccc366eb70a752d13e8cc363398486ec6f1abefa8032c156b7abfb38f7a9cc885f8410c835f9f945b515d75384325a7d1e800e7adc7

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

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/3608-143-0x0000000000D60000-0x0000000000D7A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\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
59	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4428 set thread context of 1244	4428	Halkbank,.pdf.exe	93
PID 1244 set thread context of 3608	1244	Halkbank,.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

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe
4428	Halkbank,.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4428	Halkbank,.pdf.exe
Token: SeDebugPrivilege	3608	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1244	Halkbank,.pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 4428 wrote to memory of 1244	4428	Halkbank,.pdf.exe	93
PID 1244 wrote to memory of 3608	1244	Halkbank,.pdf.exe	94
PID 1244 wrote to memory of 3608	1244	Halkbank,.pdf.exe	94
PID 1244 wrote to memory of 3608	1244	Halkbank,.pdf.exe	94
PID 1244 wrote to memory of 3608	1244	Halkbank,.pdf.exe	94
PID 1244 wrote to memory of 3608	1244	Halkbank,.pdf.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4428
- C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1244
- - 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:3608

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

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

Replay Monitor

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Downloads

memory/1244-145-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1244-144-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1244-139-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1244-137-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3608-143-0x0000000000D60000-0x0000000000D7A000-memory.dmp

Filesize
104KB

Download
memory/4428-135-0x000000000B2A0000-0x000000000B306000-memory.dmp

Filesize
408KB

Download
memory/4428-134-0x000000000AF80000-0x000000000B01C000-memory.dmp

Filesize
624KB

Download
memory/4428-133-0x0000000004FE0000-0x0000000004FEA000-memory.dmp

Filesize
40KB

Download
memory/4428-130-0x00000000005A0000-0x0000000000644000-memory.dmp

Filesize
656KB

Download
memory/4428-132-0x0000000005030000-0x00000000050C2000-memory.dmp

Filesize
584KB

Download
memory/4428-131-0x00000000055E0000-0x0000000005B84000-memory.dmp

Filesize
5.6MB

Download

Analysis

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