blustealer | 37408c9059163c6f28c340b275393eb3ff046639cd346383250d4d427c5ca6f5

Analysis

max time kernel
136s
max time network
34s
platform
windows7_x64
resource
win7-20230703-en
resource tags

arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
submitted
05-07-2023 04:00

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General

Target

REQUEST_.exe
Size

891KB
MD5

164a1a27b7b433966e4baacfd59353cc
SHA1

7d1593f5ccecd3b714b47cce75b66d477b2a6025
SHA256

9e375d13756195da6c9c580e435042ff8105ef2c2e83b0270d98f3fc387e6ce8
SHA512

0a5df388544611698fe7398ee1227e4f8c25b772fc041acdc5e9f35866efd48f268519d8089f9b0b1c4fdeee54d01b719d1c839ac3194d80f479f9d4f03f9a20
SSDEEP

12288:/Lk70TnvjcJU26d4PjQGeEBO7QMPTzAwO7DiXH8EjLvQcVnHYe0ScK1hk:zk70TrcJUL/GeEBO7QMyDMHnvGBSpc

Score

10^/10

blustealer neshta stormkitty collection persistence spyware stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot5627356603:AAG-Mx0TbSHRRW6IwndrpX3VLZdhd6C-Zac/sendMessage?chat_id=5472437377

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Detect Neshta payload 5 IoCs

resource	yara_rule
behavioral1/files/0x0001000000010324-64.dat	family_neshta
behavioral1/memory/2100-161-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/2100-163-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/2100-164-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta
behavioral1/memory/2100-166-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta

Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 3 IoCs

resource	yara_rule
behavioral1/memory/2252-101-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/2252-105-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty
behavioral1/memory/2252-108-0x0000000000090000-0x00000000000AA000-memory.dmp	family_stormkitty

Executes dropped EXE 1 IoCs

pid	Process
3048	REQUEST_.exe

Loads dropped DLL 2 IoCs

pid	Process
2100	REQUEST_.exe
2100	REQUEST_.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	REQUEST_.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-264077997-199365141-898621884-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-264077997-199365141-898621884-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-264077997-199365141-898621884-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

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
3	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3048 set thread context of 276	3048	REQUEST_.exe	29
PID 276 set thread context of 2252	276	Caspol.exe	30

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~4.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{61087~1\VCREDI~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\POWERPNT.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WINDOW~2\ACCESS~1\wordpad.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\EQUATION\EQNEDT32.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\MSInfo\msinfo32.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\OIS.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\WINWORD.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{57A73~1\VC_RED~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\FLTLDR.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~3.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\INTERN~1\iexplore.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CLVIEW.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\MAINTE~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\AcroRd32.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\Eula.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\SETUPF~1\{AC76B~1\Setup.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MOZILL~1\UNINST~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpconfig.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\CNFNOT32.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOUC.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmlaunch.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WINDOW~4\ImagingDevices.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\ADOBEC~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOICONS.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\ACCICONS.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\SOURCE~1\OSE.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ielowutil.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GRAPH.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSOHTMED.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI4223~1\sidebar.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Reader\A3DUTI~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Adobe\READER~1.0\Resource\Icons\SC_REA~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\ADOBEA~1\Versions\1.0\ADOBEA~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\VSTO\10.0\VSTOIN~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\GROOVEMN.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\MSTORE.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\WinMail.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmprph.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmpshare.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{4D8DC~1\VC_RED~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\DW\DWTRIG20.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Google\Update\DISABL~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\1033\ONELEV.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOF5E2~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\setup_wm.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WI54FB~1\wmplayer.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\ink\mip.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\MSOXMLED.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GO664E~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\INFOPATH.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\NAMECO~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\WINDOW~1\wabmig.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\misc.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\XLICONS.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~3\PACKAG~1\{CA675~1\VCREDI~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\ODeploy.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\TextConv\WksConv\Wkconv.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\Google\Update\1336~1.151\GOOGLE~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\MICROS~1\Office14\IECONT~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBEU~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\Adobe\Updater6\ADOBE_~1.EXE	REQUEST_.exe
File opened for modification	C:\PROGRA~2\INTERN~1\ieinstal.exe	REQUEST_.exe
File opened for modification	C:\PROGRA~2\COMMON~1\MICROS~1\OFFICE14\OFFICE~1\Setup.exe	REQUEST_.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\svchost.com	REQUEST_.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

Modifies registry class 1 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	REQUEST_.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	REQUEST_.exe
Token: SeDebugPrivilege	2252	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
276	Caspol.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 3048	2100	REQUEST_.exe	28
PID 2100 wrote to memory of 3048	2100	REQUEST_.exe	28
PID 2100 wrote to memory of 3048	2100	REQUEST_.exe	28
PID 2100 wrote to memory of 3048	2100	REQUEST_.exe	28
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 3048 wrote to memory of 276	3048	REQUEST_.exe	29
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30
PID 276 wrote to memory of 2252	276	Caspol.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-264077997-199365141-898621884-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-264077997-199365141-898621884-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\REQUEST_.exe
"C:\Users\Admin\AppData\Local\Temp\REQUEST_.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Users\Admin\AppData\Local\Temp\3582-490\REQUEST_.exe
  "C:\Users\Admin\AppData\Local\Temp\3582-490\REQUEST_.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\Caspol.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:276
  - - 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:2252

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

Filesize
547KB

MD5
cf6c595d3e5e9667667af096762fd9c4

SHA1
9bb44da8d7f6457099cb56e4f7d1026963dce7ce

SHA256
593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

SHA512
ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

Download Submit
C:\Users\Admin\AppData\Local\Temp\3582-490\REQUEST_.exe

Filesize
851KB

MD5
4a37626b4c816a2826515fd5a70d40b5

SHA1
58e257ded42eed23b33eaef8cddec0ddbdf9c1b0

SHA256
a0c21b1bd57a63427bee62f2d29d31bf5b9ba7f3700a458273ea8ff3a4734324

SHA512
6f58b6af0f2404a2784977b0d322984bcd35726b85ac01db8a150ac347809a03a7b10f2fcdd0b41137744d602e2c05521e9d01b6bfd9982e3518271c77a70932

Download Submit
\PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE

Filesize
252KB

MD5
9e2b9928c89a9d0da1d3e8f4bd96afa7

SHA1
ec66cda99f44b62470c6930e5afda061579cde35

SHA256
8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

SHA512
2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

Download Submit
\Users\Admin\AppData\Local\Temp\3582-490\REQUEST_.exe

Filesize
851KB

MD5
4a37626b4c816a2826515fd5a70d40b5

SHA1
58e257ded42eed23b33eaef8cddec0ddbdf9c1b0

SHA256
a0c21b1bd57a63427bee62f2d29d31bf5b9ba7f3700a458273ea8ff3a4734324

SHA512
6f58b6af0f2404a2784977b0d322984bcd35726b85ac01db8a150ac347809a03a7b10f2fcdd0b41137744d602e2c05521e9d01b6bfd9982e3518271c77a70932

Download Submit
memory/276-71-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-162-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-70-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-74-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/276-75-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-72-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-77-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/276-119-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2100-163-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2100-161-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2100-164-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2100-166-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2252-105-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/2252-101-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/2252-100-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2252-108-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/2252-99-0x0000000000090000-0x00000000000AA000-memory.dmp

Filesize
104KB

Download
memory/2252-160-0x0000000004D10000-0x0000000004D50000-memory.dmp

Filesize
256KB

Download
memory/3048-69-0x00000000020B0000-0x00000000020C0000-memory.dmp

Filesize
64KB

Download
memory/3048-68-0x0000000004890000-0x000000000494A000-memory.dmp

Filesize
744KB

Download
memory/3048-67-0x0000000004A50000-0x0000000004A90000-memory.dmp

Filesize
256KB

Download
memory/3048-66-0x0000000004A50000-0x0000000004A90000-memory.dmp

Filesize
256KB

Download
memory/3048-65-0x0000000004950000-0x0000000004A0C000-memory.dmp

Filesize
752KB

Download