blustealer | cfb4debef9e879e4063d5e1575c0d1b45a523bc8df82339f0a199bc214e0a446

General

Target

41570002689_20220922_05393480_HesapOzeti.exe
Size

868KB
MD5

da1eb258ebce6a56bb005da137e7ad39
SHA1

e7a80eac4bcc6fbc8e7781d0f62d6807edbf3baf
SHA256

cd38bbc0668699fe1761de97d8dd736321a219e5cf99767bb1f0dd81a2c03bcc
SHA512

93b6eda6f657df02208bda1e5980b1de35afea6e5f11a16fb0b621868b6bcd8d6bda04625c6f352f6935d85962458c3c2cbb2fa10f25be977eafcb6f2ab1d814
SSDEEP

12288:klDZQS57JF2fvAcxD9E0QaBNj6iumhTh9GwKuCpcVz+RfwWbjvNYugmv9uE6kfYy:aZt7v2fvdbhBNjthT6WJVQLjz

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/4304-153-0x0000000000F70000-0x0000000000F8A000-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	41570002689_20220922_05393480_HesapOzeti.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

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
53	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3032 set thread context of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 4316 set thread context of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97

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
2260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4400	powershell.exe
4400	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4316	41570002689_20220922_05393480_HesapOzeti.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4400	powershell.exe
Token: SeDebugPrivilege	4304	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4316	41570002689_20220922_05393480_HesapOzeti.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 4400	3032	41570002689_20220922_05393480_HesapOzeti.exe	92
PID 3032 wrote to memory of 4400	3032	41570002689_20220922_05393480_HesapOzeti.exe	92
PID 3032 wrote to memory of 4400	3032	41570002689_20220922_05393480_HesapOzeti.exe	92
PID 3032 wrote to memory of 2260	3032	41570002689_20220922_05393480_HesapOzeti.exe	94
PID 3032 wrote to memory of 2260	3032	41570002689_20220922_05393480_HesapOzeti.exe	94
PID 3032 wrote to memory of 2260	3032	41570002689_20220922_05393480_HesapOzeti.exe	94
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 3032 wrote to memory of 4316	3032	41570002689_20220922_05393480_HesapOzeti.exe	96
PID 4316 wrote to memory of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97
PID 4316 wrote to memory of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97
PID 4316 wrote to memory of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97
PID 4316 wrote to memory of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97
PID 4316 wrote to memory of 4304	4316	41570002689_20220922_05393480_HesapOzeti.exe	97

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\41570002689_20220922_05393480_HesapOzeti.exe
"C:\Users\Admin\AppData\Local\Temp\41570002689_20220922_05393480_HesapOzeti.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\kXeGkF.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4400
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kXeGkF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8E94.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2260
- C:\Users\Admin\AppData\Local\Temp\41570002689_20220922_05393480_HesapOzeti.exe
  "C:\Users\Admin\AppData\Local\Temp\41570002689_20220922_05393480_HesapOzeti.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4316
- - 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:4304

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8E94.tmp

Filesize
1KB

MD5
8bfaa822cc47799ab07a4828f2723930

SHA1
0c205eb456c4f99627c39748e9dc9e9da0a9a453

SHA256
ffbe4ec962f43180732cae85661ac3292187dab86113eb9455be76a6ff3be7cb

SHA512
cb38bb87719c11187fd0389af08074a008251b0fce5f222d640b26953a4b789648a3502096feb7a98376e163616d5546575c2e9e51c6c4509d4c0bfd377906b1

Download Submit
memory/3032-135-0x00000000057B0000-0x00000000057BA000-memory.dmp

Filesize
40KB

Download
memory/3032-136-0x00000000081E0000-0x000000000827C000-memory.dmp

Filesize
624KB

Download
memory/3032-137-0x0000000001740000-0x00000000017A6000-memory.dmp

Filesize
408KB

Download
memory/3032-134-0x00000000057E0000-0x0000000005872000-memory.dmp

Filesize
584KB

Download
memory/3032-133-0x0000000005CB0000-0x0000000006254000-memory.dmp

Filesize
5.6MB

Download
memory/3032-132-0x0000000000D30000-0x0000000000E0E000-memory.dmp

Filesize
888KB

Download
memory/4304-153-0x0000000000F70000-0x0000000000F8A000-memory.dmp

Filesize
104KB

Download
memory/4316-151-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4316-155-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4316-143-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4316-146-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/4400-149-0x0000000005200000-0x0000000005222000-memory.dmp

Filesize
136KB

Download
memory/4400-157-0x000000006FF20000-0x000000006FF6C000-memory.dmp

Filesize
304KB

Download
memory/4400-144-0x0000000005400000-0x0000000005A28000-memory.dmp

Filesize
6.2MB

Download
memory/4400-140-0x0000000002880000-0x00000000028B6000-memory.dmp

Filesize
216KB

Download
memory/4400-154-0x00000000061B0000-0x00000000061CE000-memory.dmp

Filesize
120KB

Download
memory/4400-156-0x0000000007190000-0x00000000071C2000-memory.dmp

Filesize
200KB

Download
memory/4400-150-0x0000000005B30000-0x0000000005B96000-memory.dmp

Filesize
408KB

Download
memory/4400-158-0x0000000006770000-0x000000000678E000-memory.dmp

Filesize
120KB

Download
memory/4400-159-0x0000000007B00000-0x000000000817A000-memory.dmp

Filesize
6.5MB

Download
memory/4400-160-0x00000000074B0000-0x00000000074CA000-memory.dmp

Filesize
104KB

Download
memory/4400-161-0x00000000065C0000-0x00000000065CA000-memory.dmp

Filesize
40KB

Download
memory/4400-162-0x0000000007740000-0x00000000077D6000-memory.dmp

Filesize
600KB

Download
memory/4400-163-0x00000000076F0000-0x00000000076FE000-memory.dmp

Filesize
56KB

Download
memory/4400-164-0x0000000007800000-0x000000000781A000-memory.dmp

Filesize
104KB

Download
memory/4400-165-0x00000000077E0000-0x00000000077E8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads