blustealer | da1affe84e54055e68af38dc7fda253d538925805b563d7a87686338a7b8d0e6

General

Target

182376,PDF.exe
Size

107KB
MD5

d97e41f8d67fbb966509824bf34191df
SHA1

f7475eee9fe28e196d2d65f4803ffe48a3dc2b26
SHA256

da1affe84e54055e68af38dc7fda253d538925805b563d7a87686338a7b8d0e6
SHA512

1d699ee7f3f537fa3e4ba1510cf19160cf25cbcd1a669bc1316b517f9891bc9fac8cbc332b0d1a6b729c3c1e9a71cd3a3f7331de86d9f633aeac5bbb14921484
SSDEEP

1536:gx/tmQiKh0Ovt0Xo++vw/18AyMMK4MIy+ZmVcl:6tD3OXo+mwNJb4MIy+Z8Y

Score

10^/10

blustealer stormkitty collection persistence stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5583812995:AAFKzjSLC2-pDvMQ8X47-80XjrRiWrDtxA/sendMessage?chat_id=5434600361

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/1880-150-0x0000000000DA0000-0x0000000000DBA000-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	182376,PDF.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\Uppqztxhpk = "\"C:\\Users\\Admin\\AppData\\Roaming\\Yvxdtnylkef\\Uppqztxhpk.exe\""	182376,PDF.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
19	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4184 set thread context of 5112	4184	182376,PDF.exe	90
PID 5112 set thread context of 1880	5112	182376,PDF.exe	91

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
4532	powershell.exe
4532	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4184	182376,PDF.exe
Token: SeDebugPrivilege	4532	powershell.exe
Token: SeDebugPrivilege	1880	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5112	182376,PDF.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4184 wrote to memory of 4532	4184	182376,PDF.exe	82
PID 4184 wrote to memory of 4532	4184	182376,PDF.exe	82
PID 4184 wrote to memory of 4532	4184	182376,PDF.exe	82
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 4184 wrote to memory of 5112	4184	182376,PDF.exe	90
PID 5112 wrote to memory of 1880	5112	182376,PDF.exe	91
PID 5112 wrote to memory of 1880	5112	182376,PDF.exe	91
PID 5112 wrote to memory of 1880	5112	182376,PDF.exe	91
PID 5112 wrote to memory of 1880	5112	182376,PDF.exe	91
PID 5112 wrote to memory of 1880	5112	182376,PDF.exe	91

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\182376,PDF.exe
"C:\Users\Admin\AppData\Local\Temp\182376,PDF.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:4184
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4532
- C:\Users\Admin\AppData\Local\Temp\182376,PDF.exe
  C:\Users\Admin\AppData\Local\Temp\182376,PDF.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5112
- - 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:1880

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/1880-151-0x0000000005B70000-0x0000000005C0C000-memory.dmp

Filesize
624KB

Download
memory/1880-150-0x0000000000DA0000-0x0000000000DBA000-memory.dmp

Filesize
104KB

Download
memory/4184-132-0x0000000000190000-0x00000000001B0000-memory.dmp

Filesize
128KB

Download
memory/4184-133-0x0000000006A10000-0x0000000006A32000-memory.dmp

Filesize
136KB

Download
memory/4532-140-0x00000000079D0000-0x000000000804A000-memory.dmp

Filesize
6.5MB

Download
memory/4532-138-0x0000000005D20000-0x0000000005D86000-memory.dmp

Filesize
408KB

Download
memory/4532-139-0x0000000006390000-0x00000000063AE000-memory.dmp

Filesize
120KB

Download
memory/4532-137-0x0000000005CB0000-0x0000000005D16000-memory.dmp

Filesize
408KB

Download
memory/4532-141-0x00000000068A0000-0x00000000068BA000-memory.dmp

Filesize
104KB

Download
memory/4532-136-0x0000000005680000-0x0000000005CA8000-memory.dmp

Filesize
6.2MB

Download
memory/4532-135-0x00000000012B0000-0x00000000012E6000-memory.dmp

Filesize
216KB

Download
memory/5112-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/5112-145-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/5112-148-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/5112-152-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads