blustealer | db8326300154e132bca39bb24e89949dbe41c9af90d9f10242dce3f9423ab094

General

Target

Ekstre_01.pdf.exe
Size

916KB
MD5

c6422b30084f0068a6fd540dbda8cbcb
SHA1

1fb25b337715fbb29fddc855db7abddd8083f298
SHA256

db8326300154e132bca39bb24e89949dbe41c9af90d9f10242dce3f9423ab094
SHA512

2e4d09af79d7b83445a70d57e3ec450e1969440525d5de8323a279bfb3637c45775f9459f267bf938dcc4f1d6b30026b85a9d4b16e8c36f3d8e197c5e8031737
SSDEEP

12288:a4wY3xGuC8aMnNAXh0mHotTm6VOs85iORdmFrVe9RpMxnsnYFofQU:a4wGGFti6StOtiOgVK62g6QU

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5374342837:AAHF-c1HAIvNCdF89VuEdNggsL2YBlpgkSE/sendMessage?chat_id=2133303215

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/4572-149-0x0000000000A00000-0x0000000000A1A000-memory.dmp	family_stormkitty

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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
37	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3228 set thread context of 224	3228	Ekstre_01.pdf.exe	92
PID 224 set thread context of 4572	224	Ekstre_01.pdf.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	AppLaunch.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3228	Ekstre_01.pdf.exe
3228	Ekstre_01.pdf.exe
3228	Ekstre_01.pdf.exe
3228	Ekstre_01.pdf.exe
3228	Ekstre_01.pdf.exe
3228	Ekstre_01.pdf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3228	Ekstre_01.pdf.exe
Token: SeDebugPrivilege	4572	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
224	Ekstre_01.pdf.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3228 wrote to memory of 2728	3228	Ekstre_01.pdf.exe	89
PID 3228 wrote to memory of 2728	3228	Ekstre_01.pdf.exe	89
PID 3228 wrote to memory of 2728	3228	Ekstre_01.pdf.exe	89
PID 3228 wrote to memory of 4680	3228	Ekstre_01.pdf.exe	90
PID 3228 wrote to memory of 4680	3228	Ekstre_01.pdf.exe	90
PID 3228 wrote to memory of 4680	3228	Ekstre_01.pdf.exe	90
PID 3228 wrote to memory of 32	3228	Ekstre_01.pdf.exe	91
PID 3228 wrote to memory of 32	3228	Ekstre_01.pdf.exe	91
PID 3228 wrote to memory of 32	3228	Ekstre_01.pdf.exe	91
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 3228 wrote to memory of 224	3228	Ekstre_01.pdf.exe	92
PID 224 wrote to memory of 4572	224	Ekstre_01.pdf.exe	93
PID 224 wrote to memory of 4572	224	Ekstre_01.pdf.exe	93
PID 224 wrote to memory of 4572	224	Ekstre_01.pdf.exe	93
PID 224 wrote to memory of 4572	224	Ekstre_01.pdf.exe	93
PID 224 wrote to memory of 4572	224	Ekstre_01.pdf.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3228
- C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe"
  2⤵
  PID:2728
- C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe"
  2⤵
  PID:4680
- C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe"
  2⤵
  PID:32
- C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Ekstre_01.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:224
- - 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:4572

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

Loading Replay Monitor...

Downloads

memory/224-147-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/224-144-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/224-150-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/224-142-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3228-134-0x0000000005340000-0x00000000053D2000-memory.dmp

Filesize
584KB

Download
memory/3228-137-0x00000000090F0000-0x0000000009156000-memory.dmp

Filesize
408KB

Download
memory/3228-136-0x0000000008FE0000-0x000000000907C000-memory.dmp

Filesize
624KB

Download
memory/3228-133-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/3228-132-0x00000000008A0000-0x000000000098C000-memory.dmp

Filesize
944KB

Download
memory/3228-135-0x00000000054D0000-0x00000000054DA000-memory.dmp

Filesize
40KB

Download
memory/4572-149-0x0000000000A00000-0x0000000000A1A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing