blustealer | ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

Analysis

max time kernel
41s
max time network
30s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
09-06-2023 05:56

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General

Target

PURCHASE_ORDER INLINE 021010.exe
Size

57KB
MD5

f40a160dfddf79de154ad448c33c2e45
SHA1

6edf15758a6618a0e357cf220225c54c10f4fc9f
SHA256

ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f
SHA512

b3f3e333995c946f8902915919da0a0e01866c75f3df577b0706734a65dff783398c2a33876b5b07d8267f5b48eabb3bd1e31ef37ab49f4bf5322c3a0847b503
SSDEEP

1536:UwlxZCBDfbP7W71uMVV1GMeaDySRImGzaref9uT:UwlxZQfbP7WbV1xeuySRIm4ayf9uT

Score

10^/10

blustealer collection persistence stealer

Malware Config

Extracted

Family

blustealer

Credentials

Protocol: smtp
Host:
mail.dphe.gov.bd
Port:
587
Username:
[email protected]
Password:
@DphE20#

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
816	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
1556	cmd.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "\"C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe\""	PURCHASE_ORDER INLINE 021010.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 816 set thread context of 984	816	svchost.exe	33
PID 984 set thread context of 1872	984	AddInProcess32.exe	34

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

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
1704	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1076	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1304	PURCHASE_ORDER INLINE 021010.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	PURCHASE_ORDER INLINE 021010.exe
Token: SeDebugPrivilege	816	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
984	AddInProcess32.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 1752	1304	PURCHASE_ORDER INLINE 021010.exe	26
PID 1304 wrote to memory of 1752	1304	PURCHASE_ORDER INLINE 021010.exe	26
PID 1304 wrote to memory of 1752	1304	PURCHASE_ORDER INLINE 021010.exe	26
PID 1752 wrote to memory of 1704	1752	cmd.exe	28
PID 1752 wrote to memory of 1704	1752	cmd.exe	28
PID 1752 wrote to memory of 1704	1752	cmd.exe	28
PID 1304 wrote to memory of 1556	1304	PURCHASE_ORDER INLINE 021010.exe	29
PID 1304 wrote to memory of 1556	1304	PURCHASE_ORDER INLINE 021010.exe	29
PID 1304 wrote to memory of 1556	1304	PURCHASE_ORDER INLINE 021010.exe	29
PID 1556 wrote to memory of 1076	1556	cmd.exe	31
PID 1556 wrote to memory of 1076	1556	cmd.exe	31
PID 1556 wrote to memory of 1076	1556	cmd.exe	31
PID 1556 wrote to memory of 816	1556	cmd.exe	32
PID 1556 wrote to memory of 816	1556	cmd.exe	32
PID 1556 wrote to memory of 816	1556	cmd.exe	32
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 816 wrote to memory of 984	816	svchost.exe	33
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34
PID 984 wrote to memory of 1872	984	AddInProcess32.exe	34

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PURCHASE_ORDER INLINE 021010.exe
"C:\Users\Admin\AppData\Local\Temp\PURCHASE_ORDER INLINE 021010.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1752
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:1704
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9C6F.tmp.bat""
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1556
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1076
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:816
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess32.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:984
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
        5⤵
        Accesses Microsoft Outlook profiles
        outlook_office_path
        outlook_win_path
        
        PID:1872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

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\tmp9C6F.tmp.bat

Filesize
151B

MD5
b318c961639def3c8a8fe9614814542a

SHA1
106aaec875bfade094b04a9889cd6c2c071f0b0c

SHA256
f8e350aed433868e5a3b41f84e85f3161538fbcbfff3ebefcf07fd34b8972eb7

SHA512
fdb6b059b2ddb7a39f8f18bee119691449d811e03f93bd3639cf4328cef3125a20eb6b595b967b95a31a83104a02d767989561fec7894ee0937ea2b7b89baa4b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9C6F.tmp.bat

Filesize
151B

MD5
b318c961639def3c8a8fe9614814542a

SHA1
106aaec875bfade094b04a9889cd6c2c071f0b0c

SHA256
f8e350aed433868e5a3b41f84e85f3161538fbcbfff3ebefcf07fd34b8972eb7

SHA512
fdb6b059b2ddb7a39f8f18bee119691449d811e03f93bd3639cf4328cef3125a20eb6b595b967b95a31a83104a02d767989561fec7894ee0937ea2b7b89baa4b

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
57KB

MD5
f40a160dfddf79de154ad448c33c2e45

SHA1
6edf15758a6618a0e357cf220225c54c10f4fc9f

SHA256
ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

SHA512
b3f3e333995c946f8902915919da0a0e01866c75f3df577b0706734a65dff783398c2a33876b5b07d8267f5b48eabb3bd1e31ef37ab49f4bf5322c3a0847b503

Download Submit
C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
57KB

MD5
f40a160dfddf79de154ad448c33c2e45

SHA1
6edf15758a6618a0e357cf220225c54c10f4fc9f

SHA256
ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

SHA512
b3f3e333995c946f8902915919da0a0e01866c75f3df577b0706734a65dff783398c2a33876b5b07d8267f5b48eabb3bd1e31ef37ab49f4bf5322c3a0847b503

Download Submit
\Users\Admin\AppData\Roaming\svchost.exe

Filesize
57KB

MD5
f40a160dfddf79de154ad448c33c2e45

SHA1
6edf15758a6618a0e357cf220225c54c10f4fc9f

SHA256
ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

SHA512
b3f3e333995c946f8902915919da0a0e01866c75f3df577b0706734a65dff783398c2a33876b5b07d8267f5b48eabb3bd1e31ef37ab49f4bf5322c3a0847b503

Download Submit
memory/816-71-0x000000001B0A0000-0x000000001B120000-memory.dmp

Filesize
512KB

Download
memory/816-70-0x00000000008A0000-0x00000000008B2000-memory.dmp

Filesize
72KB

Download
memory/984-72-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/984-74-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/984-77-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/984-87-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1304-56-0x000000001ABE0000-0x000000001AC92000-memory.dmp

Filesize
712KB

Download
memory/1304-55-0x000000001B210000-0x000000001B290000-memory.dmp

Filesize
512KB

Download
memory/1304-54-0x00000000002C0000-0x00000000002D2000-memory.dmp

Filesize
72KB

Download
memory/1872-79-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1872-80-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1872-82-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1872-84-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1872-85-0x00000000042F0000-0x00000000043AC000-memory.dmp

Filesize
752KB

Download
memory/1872-86-0x0000000004FE0000-0x0000000005020000-memory.dmp

Filesize
256KB

Download
memory/1872-78-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download