blustealer | 3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4

Analysis

max time kernel
162s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
18-07-2023 18:44

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General

Target

MT103-Payment-SwiftMesaj.exe
Size

1.0MB
MD5

962b447996d774bd6b11a221ab39bd8f
SHA1

aae4d7117ce9f6c493ed6f7c4d41cbc7c4f805f6
SHA256

3752671d8ecafe3de17f8ec3a30ef23f137d8c3cd62683a13f6e9a56db5db4f4
SHA512

23fbaf09f2e267883ed3e7db9c5f6f1512d2d2ca1ac097b23c3fb7183c7991e7c6b1397448ea996a1d24be6b16b3cc2a4b2d70fdb7c23249918d48923535df8e
SSDEEP

24576:8GFKCcW9RoTHfzW/ZOaXxLvppk/suw0kIrhDhq12N3nCAIQ9:8G8CcW9RoT/a/YahLR2/9Yeh220A

Score

10^/10

blustealer collection stealer

Malware Config

Extracted

Family

blustealer

https://api.telegram.org/bot6120911772:AAEvnEDbWRlbIuD1NP8MtmiY3tQ46T9SQyo/sendMessage?chat_id=6082430866

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-1-5-21-1498570331-2313266200-788959944-1000\Control Panel\International\Geo\Nation	MT103-Payment-SwiftMesaj.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4036 set thread context of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 1636 set thread context of 264	1636	MT103-Payment-SwiftMesaj.exe	103

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
3064	schtasks.exe

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	64	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
336	powershell.exe
336	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	336	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1636	MT103-Payment-SwiftMesaj.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 336	4036	MT103-Payment-SwiftMesaj.exe	97
PID 4036 wrote to memory of 336	4036	MT103-Payment-SwiftMesaj.exe	97
PID 4036 wrote to memory of 336	4036	MT103-Payment-SwiftMesaj.exe	97
PID 4036 wrote to memory of 3064	4036	MT103-Payment-SwiftMesaj.exe	99
PID 4036 wrote to memory of 3064	4036	MT103-Payment-SwiftMesaj.exe	99
PID 4036 wrote to memory of 3064	4036	MT103-Payment-SwiftMesaj.exe	99
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 4036 wrote to memory of 1636	4036	MT103-Payment-SwiftMesaj.exe	101
PID 1636 wrote to memory of 264	1636	MT103-Payment-SwiftMesaj.exe	103
PID 1636 wrote to memory of 264	1636	MT103-Payment-SwiftMesaj.exe	103
PID 1636 wrote to memory of 264	1636	MT103-Payment-SwiftMesaj.exe	103
PID 1636 wrote to memory of 264	1636	MT103-Payment-SwiftMesaj.exe	103
PID 1636 wrote to memory of 264	1636	MT103-Payment-SwiftMesaj.exe	103

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1498570331-2313266200-788959944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\MT103-Payment-SwiftMesaj.exe
"C:\Users\Admin\AppData\Local\Temp\MT103-Payment-SwiftMesaj.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\RnylxoqUaifuRI.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:336
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RnylxoqUaifuRI" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1EB9.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3064
- C:\Users\Admin\AppData\Local\Temp\MT103-Payment-SwiftMesaj.exe
  "C:\Users\Admin\AppData\Local\Temp\MT103-Payment-SwiftMesaj.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
    3⤵
    - Accesses Microsoft Outlook profiles
    - outlook_office_path
    - outlook_win_path
    PID:264

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

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\__PSScriptPolicyTest_el4lnuyo.azp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1EB9.tmp

Filesize
1KB

MD5
16cc207dab74af198c67701c43ddbbe3

SHA1
79eff39f675000de3cdfe5e7657d6478a6b02509

SHA256
07a302158e908e3d2d5d3c02c68ea6246984fdd4353355b17dcca2facd38bb9a

SHA512
7c926069eebe80ad19b8a0ae27c187d41d82072f43f48ebc399911cce93107cc66fb95dd2b58ccb116293adde25c14b717ba1e31c9cde7443adcb5a413950344

Download Submit
memory/264-206-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/264-204-0x0000000004B60000-0x0000000004B70000-memory.dmp

Filesize
64KB

Download
memory/264-203-0x0000000074EF0000-0x00000000756A0000-memory.dmp

Filesize
7.7MB

Download
memory/264-202-0x0000000000500000-0x0000000000566000-memory.dmp

Filesize
408KB

Download
memory/336-164-0x0000000006020000-0x0000000006086000-memory.dmp

Filesize
408KB

Download
memory/336-195-0x0000000007EE0000-0x0000000007EFA000-memory.dmp

Filesize
104KB

Download
memory/336-200-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/336-149-0x00000000052A0000-0x00000000052D6000-memory.dmp

Filesize
216KB

Download
memory/336-150-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/336-197-0x0000000007EC0000-0x0000000007EC8000-memory.dmp

Filesize
32KB

Download
memory/336-152-0x0000000005290000-0x00000000052A0000-memory.dmp

Filesize
64KB

Download
memory/336-153-0x0000000005290000-0x00000000052A0000-memory.dmp

Filesize
64KB

Download
memory/336-196-0x0000000005290000-0x00000000052A0000-memory.dmp

Filesize
64KB

Download
memory/336-157-0x0000000005910000-0x0000000005F38000-memory.dmp

Filesize
6.2MB

Download
memory/336-194-0x0000000007DD0000-0x0000000007DDE000-memory.dmp

Filesize
56KB

Download
memory/336-193-0x0000000005290000-0x00000000052A0000-memory.dmp

Filesize
64KB

Download
memory/336-160-0x0000000005780000-0x00000000057A2000-memory.dmp

Filesize
136KB

Download
memory/336-162-0x0000000005FB0000-0x0000000006016000-memory.dmp

Filesize
408KB

Download
memory/336-192-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/336-191-0x0000000007E00000-0x0000000007E96000-memory.dmp

Filesize
600KB

Download
memory/336-174-0x0000000006870000-0x000000000688E000-memory.dmp

Filesize
120KB

Download
memory/336-175-0x0000000005290000-0x00000000052A0000-memory.dmp

Filesize
64KB

Download
memory/336-176-0x0000000007A20000-0x0000000007A52000-memory.dmp

Filesize
200KB

Download
memory/336-177-0x0000000070B40000-0x0000000070B8C000-memory.dmp

Filesize
304KB

Download
memory/336-187-0x0000000006E20000-0x0000000006E3E000-memory.dmp

Filesize
120KB

Download
memory/336-188-0x00000000081C0000-0x000000000883A000-memory.dmp

Filesize
6.5MB

Download
memory/336-189-0x0000000007B80000-0x0000000007B9A000-memory.dmp

Filesize
104KB

Download
memory/336-190-0x0000000007BF0000-0x0000000007BFA000-memory.dmp

Filesize
40KB

Download
memory/1636-158-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1636-201-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/1636-154-0x0000000000400000-0x000000000046D000-memory.dmp

Filesize
436KB

Download
memory/4036-142-0x00000000051F0000-0x00000000051FA000-memory.dmp

Filesize
40KB

Download
memory/4036-143-0x0000000005410000-0x0000000005420000-memory.dmp

Filesize
64KB

Download
memory/4036-159-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4036-141-0x0000000005410000-0x0000000005420000-memory.dmp

Filesize
64KB

Download
memory/4036-144-0x0000000009220000-0x00000000092BC000-memory.dmp

Filesize
624KB

Download
memory/4036-136-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4036-140-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4036-139-0x0000000005240000-0x00000000052D2000-memory.dmp

Filesize
584KB

Download
memory/4036-138-0x00000000057F0000-0x0000000005D94000-memory.dmp

Filesize
5.6MB

Download
memory/4036-137-0x00000000006D0000-0x00000000007E2000-memory.dmp

Filesize
1.1MB

Download