blustealer | 42f31614f84336fe90a93d59c656e7c564f07497957e2876d5ea0ddb22a96d25

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
28/07/2022, 16:02

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General

Target

Docu086.exe
Size

832KB
MD5

b93e02f5cd2641229c13cffac01315a8
SHA1

0e98a61337f207d1c97aa8eae179dc528d1a75f5
SHA256

42f31614f84336fe90a93d59c656e7c564f07497957e2876d5ea0ddb22a96d25
SHA512

55de646be0b5fa8651be05a525091a29f657ad8560b5e1dbbeed0570b5b3f4da8acaabf78e29cfb05162bae758f4de6d84c804e54376a0be01ffe4d33dff4a56

Score

10^/10

blustealer stealer

Malware Config

Extracted

Family

blustealer

Credentials

Protocol: smtp
Host:
smtp.yandex.com
Port:
587
Username:
[email protected]
Password:
6%s@300%27118

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Control Panel\International\Geo\Nation	Docu086.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4780 set thread context of 3892	4780	Docu086.exe	91

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1976	powershell.exe
1976	powershell.exe
4780	Docu086.exe
4780	Docu086.exe
4780	Docu086.exe
4780	Docu086.exe
4780	Docu086.exe
4780	Docu086.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	powershell.exe
Token: SeDebugPrivilege	4780	Docu086.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3892	InstallUtil.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 1976	4780	Docu086.exe	84
PID 4780 wrote to memory of 1976	4780	Docu086.exe	84
PID 4780 wrote to memory of 1976	4780	Docu086.exe	84
PID 4780 wrote to memory of 1336	4780	Docu086.exe	90
PID 4780 wrote to memory of 1336	4780	Docu086.exe	90
PID 4780 wrote to memory of 1336	4780	Docu086.exe	90
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91
PID 4780 wrote to memory of 3892	4780	Docu086.exe	91

C:\Users\Admin\AppData\Local\Temp\Docu086.exe
"C:\Users\Admin\AppData\Local\Temp\Docu086.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:1336
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:3892

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1976-138-0x0000000005AC0000-0x0000000005ADE000-memory.dmp

Filesize
120KB

Download
memory/1976-140-0x0000000005F90000-0x0000000005FAA000-memory.dmp

Filesize
104KB

Download
memory/1976-134-0x00000000044F0000-0x0000000004526000-memory.dmp

Filesize
216KB

Download
memory/1976-135-0x0000000004B60000-0x0000000005188000-memory.dmp

Filesize
6.2MB

Download
memory/1976-136-0x0000000005380000-0x00000000053E6000-memory.dmp

Filesize
408KB

Download
memory/1976-139-0x00000000070D0000-0x000000000774A000-memory.dmp

Filesize
6.5MB

Download
memory/1976-137-0x00000000054A0000-0x0000000005506000-memory.dmp

Filesize
408KB

Download
memory/3892-143-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/3892-145-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/3892-148-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/3892-149-0x0000000000400000-0x000000000049E000-memory.dmp

Filesize
632KB

Download
memory/4780-132-0x0000000004E10000-0x0000000004E32000-memory.dmp

Filesize
136KB

Download
memory/4780-130-0x00000000001F0000-0x00000000002C6000-memory.dmp

Filesize
856KB

Download
memory/4780-131-0x0000000005390000-0x0000000005934000-memory.dmp

Filesize
5.6MB

Download