blustealer | 23b5a7169d8ab03c941f751625eabe427cc22aa4e39253af3fb7e4fc8e35a207

Analysis

max time kernel
64s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
23-10-2022 08:06

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General

Target

SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
Size

1.4MB
MD5

8d654f7f3951c4493f602eaeec06a66d
SHA1

b2dbbc4d06d197325efa9c780a881e5dc5055c8e
SHA256

23b5a7169d8ab03c941f751625eabe427cc22aa4e39253af3fb7e4fc8e35a207
SHA512

73a16f93ca5e6e521e6863df0eb361e37b2701a9178908235c6088c63f662384e315f0c31727552feb10f6739056cce9aa20d13cb6f68655a4404b0e78da785e
SSDEEP

24576:NkU0xyXgeNY7E12oi4cWAlGmEFr0ulZlh6alRsn/ju1LNajXYo3aOtY:fXgeNYM3NVAAb0slh/sUBajD3

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot5755930650:AAElY45_nxTVkERZWnAInWKh0Sygx_xge0E/sendMessage?chat_id=1293496579

Signatures

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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 584 set thread context of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
1984	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
2012	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
Token: SeDebugPrivilege	2012	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 2012	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	28
PID 1936 wrote to memory of 2012	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	28
PID 1936 wrote to memory of 2012	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	28
PID 1936 wrote to memory of 2012	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	28
PID 1936 wrote to memory of 1984	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	30
PID 1936 wrote to memory of 1984	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	30
PID 1936 wrote to memory of 1984	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	30
PID 1936 wrote to memory of 1984	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	30
PID 1936 wrote to memory of 668	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	32
PID 1936 wrote to memory of 668	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	32
PID 1936 wrote to memory of 668	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	32
PID 1936 wrote to memory of 668	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	32
PID 1936 wrote to memory of 268	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	33
PID 1936 wrote to memory of 268	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	33
PID 1936 wrote to memory of 268	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	33
PID 1936 wrote to memory of 268	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	33
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 1936 wrote to memory of 584	1936	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	34
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35
PID 584 wrote to memory of 784	584	SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe	35

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\onVgEhgtvkJAns.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2012
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\onVgEhgtvkJAns" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9D88.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1984
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe"
  2⤵
  PID:668
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe"
  2⤵
  PID:268
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.MSIL.GenKryptik.FZUN.tr.23962.24121.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:584
- - 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
    - outlook_office_path
    - outlook_win_path
    PID:784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9D88.tmp

Filesize
1KB

MD5
4ff4e2ece51058d43ec56403764a2f57

SHA1
ac419ce2effe9375a0265c080bd2caed9a76ad48

SHA256
e2f0e340bb127262342b710145ca188291d70c67c92abf1f0c57e70db7775346

SHA512
5d0748ed16268530ff7a5a4e8fbb1ba5c210918dd563378c06eaa456c9cc6926288ad654683f668cc7572e5f3d07c1f828f0c0dda0860fe909eee1efb28422e8

Download Submit
memory/584-64-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-89-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-77-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-72-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-69-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-67-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/584-65-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/784-79-0x00000000001F0000-0x0000000000256000-memory.dmp

Filesize
408KB

Download
memory/784-88-0x0000000004480000-0x000000000453C000-memory.dmp

Filesize
752KB

Download
memory/784-86-0x00000000001F0000-0x0000000000256000-memory.dmp

Filesize
408KB

Download
memory/784-84-0x00000000001F0000-0x0000000000256000-memory.dmp

Filesize
408KB

Download
memory/784-81-0x00000000001F0000-0x0000000000256000-memory.dmp

Filesize
408KB

Download
memory/1936-58-0x000000000A580000-0x000000000A64A000-memory.dmp

Filesize
808KB

Download
memory/1936-56-0x0000000000680000-0x0000000000698000-memory.dmp

Filesize
96KB

Download
memory/1936-54-0x0000000001250000-0x00000000013B8000-memory.dmp

Filesize
1.4MB

Download
memory/1936-57-0x00000000006A0000-0x00000000006AC000-memory.dmp

Filesize
48KB

Download
memory/1936-63-0x0000000006100000-0x0000000006174000-memory.dmp

Filesize
464KB

Download
memory/1936-55-0x0000000076DC1000-0x0000000076DC3000-memory.dmp

Filesize
8KB

Download
memory/2012-78-0x000000006F100000-0x000000006F6AB000-memory.dmp

Filesize
5.7MB

Download
memory/2012-76-0x000000006F100000-0x000000006F6AB000-memory.dmp

Filesize
5.7MB

Download