blustealer | 3be69750b64f87e18bcd6d779fbc9511f17e57b8c7738d9374e262fb377ff56a

General

Target

PO No. 27485758.exe
Size

228KB
MD5

47607a1861b00bcf044d136eadee4ab9
SHA1

a8879f81f8547d46930f0cd4ce338cf8af54232e
SHA256

3be69750b64f87e18bcd6d779fbc9511f17e57b8c7738d9374e262fb377ff56a
SHA512

486c4e12ec2f4cf27782e73c433a62f15e6021db2e890e94161a61a2bf591897cec8ce56bd162488bf5de1b676dc69e7ee104f8b27fde2a9126ca024a9266e1a
SSDEEP

3072:x+T6gqPPIvuvHQFpaIYkKEPIFJzE17vtx:n59HsaIYkb

Score

10^/10

blustealer stormkitty collection persistence stealer

Malware Config

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral2/memory/5116-149-0x0000000000190000-0x00000000001AA000-memory.dmp	family_stormkitty

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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	PO No. 27485758.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wjrrcyaf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Etvwu\\Wjrrcyaf.exe\""	PO No. 27485758.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
57	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3468 set thread context of 4896	3468	PO No. 27485758.exe	102
PID 4896 set thread context of 5116	4896	PO No. 27485758.exe	103

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	AppLaunch.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	AppLaunch.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
204	powershell.exe
204	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4896	PO No. 27485758.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3468	PO No. 27485758.exe
Token: SeDebugPrivilege	204	powershell.exe
Token: SeDebugPrivilege	5116	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4896	PO No. 27485758.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 204	3468	PO No. 27485758.exe	87
PID 3468 wrote to memory of 204	3468	PO No. 27485758.exe	87
PID 3468 wrote to memory of 204	3468	PO No. 27485758.exe	87
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 3468 wrote to memory of 4896	3468	PO No. 27485758.exe	102
PID 4896 wrote to memory of 5116	4896	PO No. 27485758.exe	103
PID 4896 wrote to memory of 5116	4896	PO No. 27485758.exe	103
PID 4896 wrote to memory of 5116	4896	PO No. 27485758.exe	103
PID 4896 wrote to memory of 5116	4896	PO No. 27485758.exe	103
PID 4896 wrote to memory of 5116	4896	PO No. 27485758.exe	103

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\PO No. 27485758.exe
"C:\Users\Admin\AppData\Local\Temp\PO No. 27485758.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3468
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:204
- C:\Users\Admin\AppData\Local\Temp\PO No. 27485758.exe
  "C:\Users\Admin\AppData\Local\Temp\PO No. 27485758.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4896
- - 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
    - Checks processor information in registry
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:5116

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

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/204-140-0x0000000007E30000-0x00000000084AA000-memory.dmp

Filesize
6.5MB

Download
memory/204-141-0x0000000006D00000-0x0000000006D1A000-memory.dmp

Filesize
104KB

Download
memory/204-135-0x0000000003210000-0x0000000003246000-memory.dmp

Filesize
216KB

Download
memory/204-136-0x0000000005980000-0x0000000005FA8000-memory.dmp

Filesize
6.2MB

Download
memory/204-137-0x0000000006100000-0x0000000006166000-memory.dmp

Filesize
408KB

Download
memory/204-138-0x0000000006170000-0x00000000061D6000-memory.dmp

Filesize
408KB

Download
memory/204-139-0x00000000067F0000-0x000000000680E000-memory.dmp

Filesize
120KB

Download
memory/3468-133-0x0000000005B90000-0x0000000005BB2000-memory.dmp

Filesize
136KB

Download
memory/3468-132-0x0000000000460000-0x000000000049E000-memory.dmp

Filesize
248KB

Download
memory/4896-152-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4896-143-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4896-145-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4896-150-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/5116-149-0x0000000000190000-0x00000000001AA000-memory.dmp

Filesize
104KB

Download
memory/5116-151-0x0000000005190000-0x000000000522C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads