blustealer | e95133b41a680c6eefc46c572c77c90ec1597046bfd5a7d6d6199ed566b43457

General

Target

4.exe
Size

1.9MB
MD5

adf6fb25451bedd42bf008aab3526a78
SHA1

f19c7c77ddbe01491f8deb0c1f241f7ef19341bf
SHA256

e95133b41a680c6eefc46c572c77c90ec1597046bfd5a7d6d6199ed566b43457
SHA512

12327658ca54ea5bfdc320b7136a6866620cdb3b13a057f2cd69120ae3383c18635ab57a4838ed0fb288fbd90ad9e838f984907fe8c4b12a22ac7537400f98d8

Score

10^/10

blustealer persistence stealer

Malware Config

Extracted

Family

blustealer

Credentials

Protocol: smtp
Host:
lotexh.shop
Port:
587
Username:
[email protected]
Password:
AmWcR;&S@thk

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1516	Icwumtv.exe
1488	Ocdms.exe

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-1-5-21-1502147629-2175634256-330282290-1000\Control Panel\International\Geo\Nation	4.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\WindowsUpdater.lnk	Ocdms.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Qejae = "\"C:\\Users\\Admin\\AppData\\Roaming\\Ibiwfo\\Qejae.exe\""	4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsUpdater = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Ocdms.exe\" .."	Ocdms.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3880 set thread context of 1464	3880	4.exe	83

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 12 IoCs

pid	Process
816	powershell.exe
816	powershell.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe
3880	4.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3880	4.exe
Token: SeDebugPrivilege	816	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1516	Icwumtv.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 3880 wrote to memory of 816	3880	4.exe	79
PID 3880 wrote to memory of 816	3880	4.exe	79
PID 3880 wrote to memory of 816	3880	4.exe	79
PID 3880 wrote to memory of 864	3880	4.exe	81
PID 3880 wrote to memory of 864	3880	4.exe	81
PID 3880 wrote to memory of 864	3880	4.exe	81
PID 3880 wrote to memory of 3284	3880	4.exe	82
PID 3880 wrote to memory of 3284	3880	4.exe	82
PID 3880 wrote to memory of 3284	3880	4.exe	82
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 3880 wrote to memory of 1464	3880	4.exe	83
PID 1464 wrote to memory of 1516	1464	InstallUtil.exe	84
PID 1464 wrote to memory of 1516	1464	InstallUtil.exe	84
PID 1464 wrote to memory of 1516	1464	InstallUtil.exe	84
PID 1464 wrote to memory of 1488	1464	InstallUtil.exe	85
PID 1464 wrote to memory of 1488	1464	InstallUtil.exe	85

C:\Users\Admin\AppData\Local\Temp\4.exe
"C:\Users\Admin\AppData\Local\Temp\4.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3880
- 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:816
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:864
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:3284
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1464
- - C:\Users\Admin\AppData\Local\Temp\Icwumtv.exe
    "C:\Users\Admin\AppData\Local\Temp\Icwumtv.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:1516
- - C:\Users\Admin\AppData\Local\Temp\Ocdms.exe
    "C:\Users\Admin\AppData\Local\Temp\Ocdms.exe"
    3⤵
    - Executes dropped EXE
    - Drops startup file
    - Adds Run key to start application
    PID:1488

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Icwumtv.exe

Filesize
632KB

MD5
43fad29e3e0cdba820580d0910c3cfdc

SHA1
939cdf1bb52f4e49192f9959bf539c644796b097

SHA256
edf7d6b1c9104b00cb08e9c1948d80de71bc275094b4deb08e472d67a1887d2e

SHA512
2d6246a4d2129136df7fe6e93dfc988c2de2abf27d368790271a8903e1638f74005e0b64a37a858b92ea9d64f74741801651cd42761ad89dddae578d19cd0c8e

Download Submit
C:\Users\Admin\AppData\Local\Temp\Icwumtv.exe

Filesize
632KB

MD5
43fad29e3e0cdba820580d0910c3cfdc

SHA1
939cdf1bb52f4e49192f9959bf539c644796b097

SHA256
edf7d6b1c9104b00cb08e9c1948d80de71bc275094b4deb08e472d67a1887d2e

SHA512
2d6246a4d2129136df7fe6e93dfc988c2de2abf27d368790271a8903e1638f74005e0b64a37a858b92ea9d64f74741801651cd42761ad89dddae578d19cd0c8e

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ocdms.exe

Filesize
69KB

MD5
143df79cc6329bb7d28a3914af42bad0

SHA1
bb40cbe713905da365bdfbfaa76b5afa2711500b

SHA256
c7caa2be3c12c49ed887e08a9f87afbbaef669f64ab5d9ab7a7e1acd95a99f5e

SHA512
face945582b4b52c35c7335caf2ba0e40296f029412e0b9f0a6fcb7764b3574ffabcd0fa7ba41d22ef9570c93f55a0ce058124f9efe279740bbd7b02b2459aa8

Download Submit
C:\Users\Admin\AppData\Local\Temp\Ocdms.exe

Filesize
69KB

MD5
143df79cc6329bb7d28a3914af42bad0

SHA1
bb40cbe713905da365bdfbfaa76b5afa2711500b

SHA256
c7caa2be3c12c49ed887e08a9f87afbbaef669f64ab5d9ab7a7e1acd95a99f5e

SHA512
face945582b4b52c35c7335caf2ba0e40296f029412e0b9f0a6fcb7764b3574ffabcd0fa7ba41d22ef9570c93f55a0ce058124f9efe279740bbd7b02b2459aa8

Download Submit
memory/816-138-0x0000000005600000-0x0000000005666000-memory.dmp

Filesize
408KB

Download
memory/816-136-0x0000000004D60000-0x0000000005388000-memory.dmp

Filesize
6.2MB

Download
memory/816-139-0x0000000005C30000-0x0000000005C4E000-memory.dmp

Filesize
120KB

Download
memory/816-140-0x0000000007220000-0x000000000789A000-memory.dmp

Filesize
6.5MB

Download
memory/816-141-0x0000000006110000-0x000000000612A000-memory.dmp

Filesize
104KB

Download
memory/816-135-0x0000000000F00000-0x0000000000F36000-memory.dmp

Filesize
216KB

Download
memory/816-137-0x0000000005460000-0x00000000054C6000-memory.dmp

Filesize
408KB

Download
memory/1464-145-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1464-146-0x0000000005A70000-0x0000000006014000-memory.dmp

Filesize
5.6MB

Download
memory/1464-147-0x0000000005400000-0x0000000005492000-memory.dmp

Filesize
584KB

Download
memory/1464-148-0x00000000055B0000-0x00000000055BA000-memory.dmp

Filesize
40KB

Download
memory/1488-157-0x00007FFD3B120000-0x00007FFD3BB56000-memory.dmp

Filesize
10.2MB

Download
memory/3880-132-0x0000000000F20000-0x0000000001100000-memory.dmp

Filesize
1.9MB

Download
memory/3880-133-0x0000000005E00000-0x0000000005E22000-memory.dmp

Filesize
136KB

Download

Analysis

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