blustealer | 547e11f854149b57fd150f999595def28a46ce48d71b78dd3bf3310caeb18fdb

General

Target

903_RZ_2022 Souvenir.exe
Size

958KB
MD5

6b6257f6ce106df1b8bff72a80a07dd3
SHA1

f0d7b6d3e9c3ffc6e8fcf09deb748f6cd0e88f0a
SHA256

547e11f854149b57fd150f999595def28a46ce48d71b78dd3bf3310caeb18fdb
SHA512

1498e71938066081652d52894c8c81c93a19f63dd0ef982ffc5a45cb95df5a1df026ed365d25ca073effaac134d4797c585e6802b367148793fdc0084d98f866
SSDEEP

24576:/0EGAl/FZ2jn0mIRgPkQ1WkELViqPWlD:/0EflD2MUWkE1+D

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5412597166:AAGUaWxuTxxhNb-NRhiURcTMzuW9nhGoEs/sendMessage?chat_id=932962718

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/4048-161-0x00000000005C0000-0x00000000005DA000-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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	903_RZ_2022 Souvenir.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.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
33	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4780 set thread context of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 924 set thread context of 4048	924	903_RZ_2022 Souvenir.exe	94

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

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
3572	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4080	powershell.exe
4080	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
924	903_RZ_2022 Souvenir.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4080	powershell.exe
Token: SeDebugPrivilege	4048	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
924	903_RZ_2022 Souvenir.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 4080	4780	903_RZ_2022 Souvenir.exe	89
PID 4780 wrote to memory of 4080	4780	903_RZ_2022 Souvenir.exe	89
PID 4780 wrote to memory of 4080	4780	903_RZ_2022 Souvenir.exe	89
PID 4780 wrote to memory of 3572	4780	903_RZ_2022 Souvenir.exe	91
PID 4780 wrote to memory of 3572	4780	903_RZ_2022 Souvenir.exe	91
PID 4780 wrote to memory of 3572	4780	903_RZ_2022 Souvenir.exe	91
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 4780 wrote to memory of 924	4780	903_RZ_2022 Souvenir.exe	93
PID 924 wrote to memory of 4048	924	903_RZ_2022 Souvenir.exe	94
PID 924 wrote to memory of 4048	924	903_RZ_2022 Souvenir.exe	94
PID 924 wrote to memory of 4048	924	903_RZ_2022 Souvenir.exe	94
PID 924 wrote to memory of 4048	924	903_RZ_2022 Souvenir.exe	94
PID 924 wrote to memory of 4048	924	903_RZ_2022 Souvenir.exe	94

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\903_RZ_2022 Souvenir.exe
"C:\Users\Admin\AppData\Local\Temp\903_RZ_2022 Souvenir.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4780
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\XCAuXmkvCKJ.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4080
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XCAuXmkvCKJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDFE0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3572
- C:\Users\Admin\AppData\Local\Temp\903_RZ_2022 Souvenir.exe
  "C:\Users\Admin\AppData\Local\Temp\903_RZ_2022 Souvenir.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:924
- - 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:4048

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\tmpDFE0.tmp

Filesize
1KB

MD5
022e310e98990a8b31a12af6c4716a3e

SHA1
1d509f9b189cf365c573586b22e865b4df5cb9e5

SHA256
939721d7f3eea3bc6252173a21ca33cbe02cc7186bdd0a7695d17f9ffd9c215a

SHA512
cca627ddc290e642a27f4f8914c75726cc52d1137e54115b4bde2bb2610939966c6e044a4702576b9ea5f0518ad0a76c861556e9a78182ff8d99c975ceea6c1e

Download Submit
memory/924-165-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/924-152-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/924-148-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/924-144-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4048-161-0x00000000005C0000-0x00000000005DA000-memory.dmp

Filesize
104KB

Download
memory/4080-147-0x0000000005220000-0x0000000005286000-memory.dmp

Filesize
408KB

Download
memory/4080-151-0x0000000006150000-0x000000000616E000-memory.dmp

Filesize
120KB

Download
memory/4080-140-0x0000000001060000-0x0000000001096000-memory.dmp

Filesize
216KB

Download
memory/4080-145-0x0000000005080000-0x00000000050A2000-memory.dmp

Filesize
136KB

Download
memory/4080-164-0x0000000007780000-0x0000000007788000-memory.dmp

Filesize
32KB

Download
memory/4080-142-0x00000000055D0000-0x0000000005BF8000-memory.dmp

Filesize
6.2MB

Download
memory/4080-162-0x0000000007690000-0x000000000769E000-memory.dmp

Filesize
56KB

Download
memory/4080-163-0x00000000077A0000-0x00000000077BA000-memory.dmp

Filesize
104KB

Download
memory/4080-153-0x0000000007140000-0x0000000007172000-memory.dmp

Filesize
200KB

Download
memory/4080-154-0x0000000070920000-0x000000007096C000-memory.dmp

Filesize
304KB

Download
memory/4080-155-0x00000000066F0000-0x000000000670E000-memory.dmp

Filesize
120KB

Download
memory/4080-156-0x0000000007AB0000-0x000000000812A000-memory.dmp

Filesize
6.5MB

Download
memory/4080-157-0x0000000007450000-0x000000000746A000-memory.dmp

Filesize
104KB

Download
memory/4080-158-0x00000000074D0000-0x00000000074DA000-memory.dmp

Filesize
40KB

Download
memory/4080-159-0x00000000076E0000-0x0000000007776000-memory.dmp

Filesize
600KB

Download
memory/4780-137-0x0000000001910000-0x0000000001976000-memory.dmp

Filesize
408KB

Download
memory/4780-134-0x0000000005A70000-0x0000000005B02000-memory.dmp

Filesize
584KB

Download
memory/4780-135-0x0000000005C00000-0x0000000005C0A000-memory.dmp

Filesize
40KB

Download
memory/4780-136-0x0000000009940000-0x00000000099DC000-memory.dmp

Filesize
624KB

Download
memory/4780-132-0x0000000000FE0000-0x00000000010D4000-memory.dmp

Filesize
976KB

Download
memory/4780-133-0x0000000005F40000-0x00000000064E4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads