blustealer | ca43187a938211fe07ce02306e744c6c41b10fb12129d5e9b3c083a23541066f

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
08-06-2023 07:35

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General

Target

tmpjkdueik4.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	tmpjkdueik4.exe

Executes dropped EXE 1 IoCs

pid	Process
2020	svchost.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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\""	tmpjkdueik4.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2020 set thread context of 3292	2020	svchost.exe	118
PID 3292 set thread context of 3804	3292	AddInProcess32.exe	119

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
4308	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1248	timeout.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
4872	tmpjkdueik4.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe
2020	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	tmpjkdueik4.exe
Token: SeDebugPrivilege	2020	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3292	AddInProcess32.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 2220	4872	tmpjkdueik4.exe	83
PID 4872 wrote to memory of 2220	4872	tmpjkdueik4.exe	83
PID 4872 wrote to memory of 1124	4872	tmpjkdueik4.exe	85
PID 4872 wrote to memory of 1124	4872	tmpjkdueik4.exe	85
PID 1124 wrote to memory of 1248	1124	cmd.exe	87
PID 1124 wrote to memory of 1248	1124	cmd.exe	87
PID 2220 wrote to memory of 4308	2220	cmd.exe	88
PID 2220 wrote to memory of 4308	2220	cmd.exe	88
PID 1124 wrote to memory of 2020	1124	cmd.exe	89
PID 1124 wrote to memory of 2020	1124	cmd.exe	89
PID 2020 wrote to memory of 968	2020	svchost.exe	90
PID 2020 wrote to memory of 968	2020	svchost.exe	90
PID 2020 wrote to memory of 3680	2020	svchost.exe	91
PID 2020 wrote to memory of 3680	2020	svchost.exe	91
PID 2020 wrote to memory of 4736	2020	svchost.exe	92
PID 2020 wrote to memory of 4736	2020	svchost.exe	92
PID 2020 wrote to memory of 428	2020	svchost.exe	93
PID 2020 wrote to memory of 428	2020	svchost.exe	93
PID 2020 wrote to memory of 3984	2020	svchost.exe	94
PID 2020 wrote to memory of 3984	2020	svchost.exe	94
PID 2020 wrote to memory of 1336	2020	svchost.exe	95
PID 2020 wrote to memory of 1336	2020	svchost.exe	95
PID 2020 wrote to memory of 60	2020	svchost.exe	96
PID 2020 wrote to memory of 60	2020	svchost.exe	96
PID 2020 wrote to memory of 4032	2020	svchost.exe	97
PID 2020 wrote to memory of 4032	2020	svchost.exe	97
PID 2020 wrote to memory of 4764	2020	svchost.exe	98
PID 2020 wrote to memory of 4764	2020	svchost.exe	98
PID 2020 wrote to memory of 2600	2020	svchost.exe	99
PID 2020 wrote to memory of 2600	2020	svchost.exe	99
PID 2020 wrote to memory of 2700	2020	svchost.exe	100
PID 2020 wrote to memory of 2700	2020	svchost.exe	100
PID 2020 wrote to memory of 352	2020	svchost.exe	101
PID 2020 wrote to memory of 352	2020	svchost.exe	101
PID 2020 wrote to memory of 312	2020	svchost.exe	102
PID 2020 wrote to memory of 312	2020	svchost.exe	102
PID 2020 wrote to memory of 228	2020	svchost.exe	103
PID 2020 wrote to memory of 228	2020	svchost.exe	103
PID 2020 wrote to memory of 264	2020	svchost.exe	104
PID 2020 wrote to memory of 264	2020	svchost.exe	104
PID 2020 wrote to memory of 4404	2020	svchost.exe	105
PID 2020 wrote to memory of 4404	2020	svchost.exe	105
PID 2020 wrote to memory of 1772	2020	svchost.exe	106
PID 2020 wrote to memory of 1772	2020	svchost.exe	106
PID 2020 wrote to memory of 1636	2020	svchost.exe	107
PID 2020 wrote to memory of 1636	2020	svchost.exe	107
PID 2020 wrote to memory of 3968	2020	svchost.exe	108
PID 2020 wrote to memory of 3968	2020	svchost.exe	108
PID 2020 wrote to memory of 644	2020	svchost.exe	109
PID 2020 wrote to memory of 644	2020	svchost.exe	109
PID 2020 wrote to memory of 804	2020	svchost.exe	110
PID 2020 wrote to memory of 804	2020	svchost.exe	110
PID 2020 wrote to memory of 452	2020	svchost.exe	111
PID 2020 wrote to memory of 452	2020	svchost.exe	111
PID 2020 wrote to memory of 1928	2020	svchost.exe	112
PID 2020 wrote to memory of 1928	2020	svchost.exe	112
PID 2020 wrote to memory of 4704	2020	svchost.exe	113
PID 2020 wrote to memory of 4704	2020	svchost.exe	113
PID 2020 wrote to memory of 4580	2020	svchost.exe	114
PID 2020 wrote to memory of 4580	2020	svchost.exe	114
PID 2020 wrote to memory of 1552	2020	svchost.exe	115
PID 2020 wrote to memory of 1552	2020	svchost.exe	115
PID 2020 wrote to memory of 4628	2020	svchost.exe	116
PID 2020 wrote to memory of 4628	2020	svchost.exe	116

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\tmpjkdueik4.exe
"C:\Users\Admin\AppData\Local\Temp\tmpjkdueik4.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4872
- 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:2220
- - 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:4308
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8988.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1124
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1248
- - 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:2020
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegSvcs.exe"
      4⤵
      PID:968
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe"
      4⤵
      PID:3680
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\EdmGen.exe"
      4⤵
      PID:4736
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\dfsvc.exe"
      4⤵
      PID:428
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regsql.exe"
      4⤵
      PID:3984
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_compiler.exe"
      4⤵
      PID:1336
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngentask.exe"
      4⤵
      PID:60
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regbrowsers.exe"
      4⤵
      PID:4032
  - - 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:4764
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ilasm.exe"
      4⤵
      PID:2600
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\DataSvcUtil.exe"
      4⤵
      PID:2700
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\RegAsm.exe"
      4⤵
      PID:352
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ServiceModelReg.exe"
      4⤵
      PID:312
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe"
      4⤵
      PID:228
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ComSvcConfig.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ComSvcConfig.exe"
      4⤵
      PID:264
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe"
      4⤵
      PID:4404
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe"
      4⤵
      PID:1772
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_wp.exe"
      4⤵
      PID:1636
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\vbc.exe"
      4⤵
      PID:3968
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"
      4⤵
      PID:644
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WsatConfig.exe"
      4⤵
      PID:804
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SMSvcHost.exe"
      4⤵
      PID:452
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe"
      4⤵
      PID:1928
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe"
      4⤵
      PID:4704
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInUtil.exe"
      4⤵
      PID:4580
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe"
      4⤵
      PID:1552
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe"
      4⤵
      PID:4628
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"
      4⤵
      PID:2552
  - - 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
      PID:3292
    - - 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:3804

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Scripting

T1064

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\tmp8988.tmp.bat

Filesize
151B

MD5
6eb0df0887debf15cf819a8be90738ad

SHA1
5e0d2acf1a43af2d82dc4cb9a9726d8151cb893d

SHA256
3dd89146c684d402a54ec581fa6a2dacc36c9ce28fc5f413c330f12b8abc6d9d

SHA512
d73f8788e8a94381bcca5afd826cb76da56d642033186bd2df4afcc75607e508c9916d5be742214dd64454e876a6f076b9ba36f2c3c10a106a6fbfcabb970783

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/3292-144-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3292-147-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3292-153-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/3804-150-0x0000000001370000-0x00000000013D6000-memory.dmp

Filesize
408KB

Download
memory/3804-151-0x0000000005BE0000-0x0000000005C7C000-memory.dmp

Filesize
624KB

Download
memory/4872-133-0x0000023049610000-0x0000023049622000-memory.dmp

Filesize
72KB

Download
memory/4872-134-0x0000023064130000-0x0000023064658000-memory.dmp

Filesize
5.2MB

Download
memory/4872-135-0x0000023063BF0000-0x0000023063C00000-memory.dmp

Filesize
64KB

Download