blustealer | 77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087

General

Target

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
Size

187KB
MD5

72048fbaab48b29537a9b8b6af6bd37d
SHA1

fb253b22ae678164dad4de1f8f472a1338c8582a
SHA256

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087
SHA512

8909e498201a610020fd59e7bfc1340da71dc0ca8a4205adaba12151dd50a0cb0e88b0b358a361ecec5d6cefa5708bc7a19dea21e5b9d857d1057fce27640601

Score

10^/10

blustealer persistence stealer

Malware Config

Extracted

Family

blustealer

Credentials

Protocol: smtp
Host:
mail.juhun.shop
Port:
587
Username:
[email protected]
Password:
(_ZH%s&u{1FF

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

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rvkkghcc = "\"C:\\Users\\Admin\\AppData\\Roaming\\Gqguc\\Rvkkghcc.exe\""	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

description	pid	Process	procid_target
PID 1768 set thread context of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
4916	timeout.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

pid	Process
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

description	pid	Process
Token: SeDebugPrivilege	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

InstallUtil.exe

pid	Process
524	InstallUtil.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.execmd.exe

description	pid	Process	procid_target
PID 1768 wrote to memory of 2704	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	84
PID 1768 wrote to memory of 2704	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	84
PID 1768 wrote to memory of 2704	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	84
PID 2704 wrote to memory of 4916	2704	cmd.exe	85
PID 2704 wrote to memory of 4916	2704	cmd.exe	85
PID 2704 wrote to memory of 4916	2704	cmd.exe	85
PID 1768 wrote to memory of 2596	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	88
PID 1768 wrote to memory of 2596	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	88
PID 1768 wrote to memory of 2596	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	88
PID 1768 wrote to memory of 4032	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	89
PID 1768 wrote to memory of 4032	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	89
PID 1768 wrote to memory of 4032	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	89
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90
PID 1768 wrote to memory of 524	1768	77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe	90

C:\Users\Admin\AppData\Local\Temp\77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.exe
"C:\Users\Admin\AppData\Local\Temp\77053cffbf81fc755f5d119b907f63456ff18706a3274bf619315baf03411087.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:1768
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 11
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\SysWOW64\timeout.exe
    timeout 11
    3⤵
    - Delays execution with timeout.exe
    PID:4916
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:2596
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  PID:4032
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:524

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

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Downloads

memory/524-143-0x0000000000400000-0x000000000049F000-memory.dmp

Filesize
636KB

Download
memory/524-147-0x0000000000400000-0x000000000049F000-memory.dmp

Filesize
636KB

Download
memory/524-146-0x0000000000400000-0x000000000049F000-memory.dmp

Filesize
636KB

Download
memory/524-140-0x0000000000000000-mapping.dmp

Download
memory/524-141-0x0000000000400000-0x000000000049F000-memory.dmp

Filesize
636KB

Download
memory/1768-131-0x0000000005DA0000-0x0000000006344000-memory.dmp

Filesize
5.6MB

Download
memory/1768-132-0x0000000005710000-0x00000000057A2000-memory.dmp

Filesize
584KB

Download
memory/1768-133-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/1768-134-0x0000000007BC0000-0x0000000007C36000-memory.dmp

Filesize
472KB

Download
memory/1768-135-0x0000000008B50000-0x0000000008B6E000-memory.dmp

Filesize
120KB

Download
memory/1768-130-0x0000000000D40000-0x0000000000D74000-memory.dmp

Filesize
208KB

Download
memory/2596-138-0x0000000000000000-mapping.dmp

Download
memory/2704-136-0x0000000000000000-mapping.dmp

Download
memory/4032-139-0x0000000000000000-mapping.dmp

Download
memory/4916-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads