blustealer | 9e24a8e4cef47a41f9434fddf3ce24b754d3ba105cdf10ab936b446d0e700e7d

Analysis

max time kernel
131s
max time network
122s
platform
windows10_x64
resource
win10-en-20211208
submitted
15/12/2021, 01:52

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General

Target
Product-63036500212_IMG.exe
Size 1.0MB
Sample211215-caeacagfa8
SHA256 9e24a8e4cef47a41f9434fddf3ce24b754d3ba105cdf10ab936b446d0e700e7d
MD5 b0f6a1985213d6310bc369bf747e3f19
SHA1 630617c252229ff0239345896ac7440aa53857ee
SHA512 a7c80806c47233c05d27222f975e3c09ed5e0d32bb59e74a3f8b3ed84c9842b6a9ebb297b949dd5d770134ea0cf90783554a5a8e28fe47371347310df8da5995
MD5 SHA1 SHA512

Score

10^/10

blustealer stealer

Malware Config

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
1524	sobu.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\abc.txt	sobu.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2836 set thread context of 2264	2836	Product-63036500212_IMG.exe	69
PID 1524 set thread context of 1912	1524	sobu.exe	81

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
3148	schtasks.exe
3144	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	Product-63036500212_IMG.exe
Token: SeDebugPrivilege	1524	sobu.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	vbc.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 2264	2836	Product-63036500212_IMG.exe	69
PID 2836 wrote to memory of 1428	2836	Product-63036500212_IMG.exe	71
PID 2836 wrote to memory of 1428	2836	Product-63036500212_IMG.exe	71
PID 2836 wrote to memory of 1428	2836	Product-63036500212_IMG.exe	71
PID 2836 wrote to memory of 684	2836	Product-63036500212_IMG.exe	72
PID 2836 wrote to memory of 684	2836	Product-63036500212_IMG.exe	72
PID 2836 wrote to memory of 684	2836	Product-63036500212_IMG.exe	72
PID 2836 wrote to memory of 616	2836	Product-63036500212_IMG.exe	75
PID 2836 wrote to memory of 616	2836	Product-63036500212_IMG.exe	75
PID 2836 wrote to memory of 616	2836	Product-63036500212_IMG.exe	75
PID 684 wrote to memory of 3148	684	cmd.exe	77
PID 684 wrote to memory of 3148	684	cmd.exe	77
PID 684 wrote to memory of 3148	684	cmd.exe	77
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 1912	1524	sobu.exe	81
PID 1524 wrote to memory of 2136	1524	sobu.exe	82
PID 1524 wrote to memory of 2136	1524	sobu.exe	82
PID 1524 wrote to memory of 2136	1524	sobu.exe	82
PID 1524 wrote to memory of 2168	1524	sobu.exe	83
PID 1524 wrote to memory of 2168	1524	sobu.exe	83
PID 1524 wrote to memory of 2168	1524	sobu.exe	83
PID 1524 wrote to memory of 2456	1524	sobu.exe	84
PID 1524 wrote to memory of 2456	1524	sobu.exe	84
PID 1524 wrote to memory of 2456	1524	sobu.exe	84
PID 2168 wrote to memory of 3144	2168	cmd.exe	88
PID 2168 wrote to memory of 3144	2168	cmd.exe	88
PID 2168 wrote to memory of 3144	2168	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\Product-63036500212_IMG.exe
"C:\Users\Admin\AppData\Local\Temp\Product-63036500212_IMG.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2836
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:2264
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\sobu"
  2⤵
  PID:1428
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\sobu\sobu.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:684
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\sobu\sobu.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:3148
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\Product-63036500212_IMG.exe" "C:\Users\Admin\AppData\Roaming\sobu\sobu.exe"
  2⤵
  PID:616

C:\Users\Admin\AppData\Roaming\sobu\sobu.exe
C:\Users\Admin\AppData\Roaming\sobu\sobu.exe
1⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
  2⤵
  PID:1912
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c mkdir "C:\Users\Admin\AppData\Roaming\sobu"
  2⤵
  PID:2136
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\sobu\sobu.exe'" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2168
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Roaming\sobu\sobu.exe'" /f
    3⤵
    - Creates scheduled task(s)
    PID:3144
- C:\Windows\SysWOW64\cmd.exe
  "cmd" /c copy "C:\Users\Admin\AppData\Roaming\sobu\sobu.exe" "C:\Users\Admin\AppData\Roaming\sobu\sobu.exe"
  2⤵
  PID:2456

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Scripting

T1064

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1524-134-0x0000000001190000-0x0000000001191000-memory.dmp

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memory/1524-139-0x0000000005080000-0x0000000005081000-memory.dmp

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memory/2264-125-0x00000000049E0000-0x00000000049E1000-memory.dmp

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memory/2264-124-0x00000000049E0000-0x00000000049E1000-memory.dmp

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memory/2264-122-0x0000000000400000-0x000000000049F000-memory.dmp

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memory/2836-120-0x0000000004F00000-0x0000000004F01000-memory.dmp

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memory/2836-119-0x0000000004E30000-0x0000000004E31000-memory.dmp

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memory/2836-118-0x0000000005410000-0x0000000005411000-memory.dmp

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memory/2836-117-0x0000000004DC0000-0x0000000004DC1000-memory.dmp

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memory/2836-115-0x0000000001370000-0x0000000001371000-memory.dmp

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memory/2836-121-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads