blustealer | 98c1d9168df53dd9c2da28bfafb7af7a417719ab2fed404a3bacc7aeea3d5872

General

Target

fatura64383,pdf.exe
Size

298KB
MD5

c3d62fd39dd8b743b5fc0d6464f064d1
SHA1

88f30196adc87c47712679d07720131495da16dc
SHA256

98c1d9168df53dd9c2da28bfafb7af7a417719ab2fed404a3bacc7aeea3d5872
SHA512

a9a7aec144659e7ddbc318a563e29374f0621840a0600debd0003ee454bb24907d9cc976f9dcb45f58d1018d1610439cb867219330c6139d7b7dddf6b7ea9088
SSDEEP

3072:gfY/TU9fE9PEtuTgSECqpObc00brGmx1TJOz0Id+icyJvFap3UAoewa0ux59Dkrd:2Ya69gSECqpOY02iQJOS4ptHpvS1xO

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/2480-142-0x00000000001D0000-0x00000000001EA000-memory.dmp	family_stormkitty

Executes dropped EXE 2 IoCs

pid	Process
4252	ehnqqas.exe
4384	ehnqqas.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Office\15.0\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
12	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4252 set thread context of 4384	4252	ehnqqas.exe	83
PID 4384 set thread context of 2480	4384	ehnqqas.exe	86

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: MapViewOfSection 1 IoCs

pid	Process
4252	ehnqqas.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2480	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4384	ehnqqas.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3444 wrote to memory of 4252	3444	fatura64383,pdf.exe	81
PID 3444 wrote to memory of 4252	3444	fatura64383,pdf.exe	81
PID 3444 wrote to memory of 4252	3444	fatura64383,pdf.exe	81
PID 4252 wrote to memory of 4384	4252	ehnqqas.exe	83
PID 4252 wrote to memory of 4384	4252	ehnqqas.exe	83
PID 4252 wrote to memory of 4384	4252	ehnqqas.exe	83
PID 4252 wrote to memory of 4384	4252	ehnqqas.exe	83
PID 4384 wrote to memory of 2480	4384	ehnqqas.exe	86
PID 4384 wrote to memory of 2480	4384	ehnqqas.exe	86
PID 4384 wrote to memory of 2480	4384	ehnqqas.exe	86
PID 4384 wrote to memory of 2480	4384	ehnqqas.exe	86
PID 4384 wrote to memory of 2480	4384	ehnqqas.exe	86

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\fatura64383,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\fatura64383,pdf.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3444
- C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe
  "C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe" C:\Users\Admin\AppData\Local\Temp\xpwakfp.f
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4252
- - C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe
    "C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4384
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      4⤵
      Accesses Microsoft Outlook profiles
      Checks processor information in registry
      Suspicious use of AdjustPrivilegeToken
      outlook_office_path
      outlook_win_path
      PID:2480

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

C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe

Filesize
83KB

MD5
ce57672797011490cc6180f83733d6a4

SHA1
72f784dcded7352850f9ae1da852781466a4d912

SHA256
32eb0a68a3df821ec8ae2c9416ae7694db5c14961cc333a46a677477cfc598dd

SHA512
ded01c4bf1b144ca4a8d4ed229778944a1f8357efea1f8a0bab8223d4da43bc3137254f294f85ed267c738bac946f036670d20c9fbab8d9ba48d464038257af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe

Filesize
83KB

MD5
ce57672797011490cc6180f83733d6a4

SHA1
72f784dcded7352850f9ae1da852781466a4d912

SHA256
32eb0a68a3df821ec8ae2c9416ae7694db5c14961cc333a46a677477cfc598dd

SHA512
ded01c4bf1b144ca4a8d4ed229778944a1f8357efea1f8a0bab8223d4da43bc3137254f294f85ed267c738bac946f036670d20c9fbab8d9ba48d464038257af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\ehnqqas.exe

Filesize
83KB

MD5
ce57672797011490cc6180f83733d6a4

SHA1
72f784dcded7352850f9ae1da852781466a4d912

SHA256
32eb0a68a3df821ec8ae2c9416ae7694db5c14961cc333a46a677477cfc598dd

SHA512
ded01c4bf1b144ca4a8d4ed229778944a1f8357efea1f8a0bab8223d4da43bc3137254f294f85ed267c738bac946f036670d20c9fbab8d9ba48d464038257af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\gslgjzrw.i

Filesize
156KB

MD5
9d005362c2b002f57d200e83ebc5fe9c

SHA1
50072a9936f9d42691a6c6fdc82552be2b743974

SHA256
cbc940e42e956f031b3a09da605fd8ed5e5d8967f0a69114f4e08655837e7b07

SHA512
ed55b472651bac294a21d9fa3173cdb4bf77b77c26f29cc63b483895bbe5788536d5a46d35f3af4c4400714bdc14af48197583308121923acce988b536d369f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\xpwakfp.f

Filesize
6KB

MD5
4ca2a013fb77d398da0c4c180837d578

SHA1
4f7d1977bfb6f3137135a4227e788e154379973b

SHA256
3b41d65f3ac7f2091c227a3d59152edf03bb7562e322dbd8ce1ffbe255e40f57

SHA512
ebfe9ee07e428c113f05ed8a1752c2f931686aa7ce0cc458cafa2bcda1e000723be850b92e7c34587d6c8cc246d735048fc9e7fa34558470a9a6bd73f683c6df

Download Submit
memory/2480-142-0x00000000001D0000-0x00000000001EA000-memory.dmp

Filesize
104KB

Download
memory/2480-143-0x00000000049A0000-0x0000000004A06000-memory.dmp

Filesize
408KB

Download
memory/2480-145-0x0000000005340000-0x00000000053DC000-memory.dmp

Filesize
624KB

Download
memory/4384-144-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4384-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing