blustealer | ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

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

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-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	PURCHASE_ORDER INLINE 021010.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	svchost.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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-1-5-21-2805025096-2326403612-4231045514-1000\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 4976 set thread context of 232	4976	svchost.exe	94
PID 232 set thread context of 3652	232	jsc.exe	96

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
3608	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1532	timeout.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
2680	PURCHASE_ORDER INLINE 021010.exe
4976	svchost.exe
4976	svchost.exe
4976	svchost.exe
4976	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2680	PURCHASE_ORDER INLINE 021010.exe
Token: SeDebugPrivilege	4976	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
232	jsc.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2680 wrote to memory of 4460	2680	PURCHASE_ORDER INLINE 021010.exe	83
PID 2680 wrote to memory of 4460	2680	PURCHASE_ORDER INLINE 021010.exe	83
PID 2680 wrote to memory of 2640	2680	PURCHASE_ORDER INLINE 021010.exe	85
PID 2680 wrote to memory of 2640	2680	PURCHASE_ORDER INLINE 021010.exe	85
PID 4460 wrote to memory of 3608	4460	cmd.exe	87
PID 4460 wrote to memory of 3608	4460	cmd.exe	87
PID 2640 wrote to memory of 1532	2640	cmd.exe	88
PID 2640 wrote to memory of 1532	2640	cmd.exe	88
PID 2640 wrote to memory of 4976	2640	cmd.exe	89
PID 2640 wrote to memory of 4976	2640	cmd.exe	89
PID 4976 wrote to memory of 32	4976	svchost.exe	92
PID 4976 wrote to memory of 32	4976	svchost.exe	92
PID 4976 wrote to memory of 2188	4976	svchost.exe	93
PID 4976 wrote to memory of 2188	4976	svchost.exe	93
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 4976 wrote to memory of 232	4976	svchost.exe	94
PID 232 wrote to memory of 3652	232	jsc.exe	96
PID 232 wrote to memory of 3652	232	jsc.exe	96
PID 232 wrote to memory of 3652	232	jsc.exe	96
PID 232 wrote to memory of 3652	232	jsc.exe	96
PID 232 wrote to memory of 3652	232	jsc.exe	96

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-1-5-21-2805025096-2326403612-4231045514-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\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⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2680
- 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:4460
- - 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:3608
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6E4F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2640
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1532
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4976
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe"
      4⤵
      PID:32
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.Workflow.Compiler.exe"
      4⤵
      PID:2188
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe"
      4⤵
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:232
    - - 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:3652

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6E4F.tmp.bat

Filesize
151B

MD5
c95b5f8881290eb3441582bda8d27a36

SHA1
2c9a68c30630f42a1824685e57357fda34da0cdc

SHA256
3d307ea1aeb7448642eefb64bc980d8674da30585273728228f674792665dc3f

SHA512
65947181294bc04a6af8805f6ab15cc1dc237d53c472973f11a5b1c72826c3fa9441ed89f0d8bcef4363b72b7685e81899f8104ce514ba516c7e97a59428bc2f

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
memory/232-144-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/232-147-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/232-150-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/232-155-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/2680-135-0x0000021C8D010000-0x0000021C8D020000-memory.dmp

Filesize
64KB

Download
memory/2680-134-0x0000021CA5C50000-0x0000021CA6178000-memory.dmp

Filesize
5.2MB

Download
memory/2680-133-0x0000021C8B140000-0x0000021C8B152000-memory.dmp

Filesize
72KB

Download
memory/3652-151-0x0000000000C90000-0x0000000000CF6000-memory.dmp

Filesize
408KB

Download
memory/3652-152-0x0000000005670000-0x000000000570C000-memory.dmp

Filesize
624KB

Download
memory/3652-153-0x00000000057A0000-0x00000000057B0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads