blustealer | d03d5b49976a7d150f77a892f429ed698246930ba82e538b25f7835d67b9323d

General

Target

hesaphareketi-01.pdf.exe
Size

358KB
MD5

587a57c6f8590b6367d67b17fce54c0d
SHA1

cbe56fc0d05531d2d9e7f5c4ef628e1a9941fba7
SHA256

d03d5b49976a7d150f77a892f429ed698246930ba82e538b25f7835d67b9323d
SHA512

3830c61306e797465d480e6330666575669d2e5860595c6378c270b5fcc60e0b13fc0cc51f8b95b6871f21d923c99a950027a9c7138efc28766308800a11c1d2
SSDEEP

6144:oYa6Si77eBf68RvZWDvY4dUk931r+qzmnblebHqHhfM:oY4i46GhWDTldzacHqBU

Score

10^/10

blustealer stormkitty collection stealer

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5468731092:AAGGNQWBVRhX622u6xp1moMhaunIGtXuIxg/sendMessage?chat_id=1639214896

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/4396-142-0x0000000000570000-0x000000000058A000-memory.dmp	family_stormkitty

Executes dropped EXE 2 IoCs

pid	Process
3988	iaszff.exe
1880	iaszff.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
10	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3988 set thread context of 1880	3988	iaszff.exe	83
PID 1880 set thread context of 4396	1880	iaszff.exe	84

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: MapViewOfSection 1 IoCs

pid	Process
3988	iaszff.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4396	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1880	iaszff.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4408 wrote to memory of 3988	4408	hesaphareketi-01.pdf.exe	82
PID 4408 wrote to memory of 3988	4408	hesaphareketi-01.pdf.exe	82
PID 4408 wrote to memory of 3988	4408	hesaphareketi-01.pdf.exe	82
PID 3988 wrote to memory of 1880	3988	iaszff.exe	83
PID 3988 wrote to memory of 1880	3988	iaszff.exe	83
PID 3988 wrote to memory of 1880	3988	iaszff.exe	83
PID 3988 wrote to memory of 1880	3988	iaszff.exe	83
PID 1880 wrote to memory of 4396	1880	iaszff.exe	84
PID 1880 wrote to memory of 4396	1880	iaszff.exe	84
PID 1880 wrote to memory of 4396	1880	iaszff.exe	84
PID 1880 wrote to memory of 4396	1880	iaszff.exe	84
PID 1880 wrote to memory of 4396	1880	iaszff.exe	84

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\hesaphareketi-01.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\hesaphareketi-01.pdf.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4408
- C:\Users\Admin\AppData\Local\Temp\iaszff.exe
  "C:\Users\Admin\AppData\Local\Temp\iaszff.exe" C:\Users\Admin\AppData\Local\Temp\aoomwnkkess.t
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3988
- - C:\Users\Admin\AppData\Local\Temp\iaszff.exe
    "C:\Users\Admin\AppData\Local\Temp\iaszff.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1880
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      4⤵
      Accesses Microsoft Outlook profiles
      Checks processor information in registry
      Suspicious use of AdjustPrivilegeToken
      outlook_office_path
      outlook_win_path
      PID:4396

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\aoomwnkkess.t

Filesize
5KB

MD5
768f9eebb890c8e8df663160aa8a4f2f

SHA1
b9085918f05cd335808b178d314f30ae2e5f0414

SHA256
18466ea3d268516177c8b4a69453117cc99eb92f717d5b7d33e08991e13bfdb2

SHA512
74a1a7055414ee1cf03f5fa9c3b3d12e38f21f79038ebc05308fc81c7cc1caa23275797f2921ddd1492edb2089435ceb60a4163617d91ad3a4e140849f981754

Download Submit
C:\Users\Admin\AppData\Local\Temp\cjkohdr.op

Filesize
156KB

MD5
7df2511e099d1d0b635a57aa73824795

SHA1
5ef5efb8113b95f0c248404e9d28e8752854abca

SHA256
170c2b0bfbb918fb3f1806c836086456dbdbcb421ff7bc74535e15342624a44a

SHA512
8ab646bacad5467247011e3a3a5439f8dd63a1c61b98fc282ac60791618aaaf7194df2e09115e786d1a600916efe6edf83dbe6aa4ad914e0938be61488a766ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\iaszff.exe

Filesize
80KB

MD5
b9e8ce212ab0c4fe8a64dff29a99aeef

SHA1
9c86b09c0bcf382bd84e4d8364c42fcca65e4c26

SHA256
d62eb4efe7591dd9a762975ac373ea141a6f6a6a20fac45762953f1c353ed680

SHA512
0ad750ab9178c866711f9c80ccc5c5fa10fe32c5bb7cef29182e85d5ca83c1f21fa4a66ea467019ca9c9d7b1aa04cd08ae30d656f9f73beeb1a635224017bd57

Download Submit
C:\Users\Admin\AppData\Local\Temp\iaszff.exe

Filesize
80KB

MD5
b9e8ce212ab0c4fe8a64dff29a99aeef

SHA1
9c86b09c0bcf382bd84e4d8364c42fcca65e4c26

SHA256
d62eb4efe7591dd9a762975ac373ea141a6f6a6a20fac45762953f1c353ed680

SHA512
0ad750ab9178c866711f9c80ccc5c5fa10fe32c5bb7cef29182e85d5ca83c1f21fa4a66ea467019ca9c9d7b1aa04cd08ae30d656f9f73beeb1a635224017bd57

Download Submit
C:\Users\Admin\AppData\Local\Temp\iaszff.exe

Filesize
80KB

MD5
b9e8ce212ab0c4fe8a64dff29a99aeef

SHA1
9c86b09c0bcf382bd84e4d8364c42fcca65e4c26

SHA256
d62eb4efe7591dd9a762975ac373ea141a6f6a6a20fac45762953f1c353ed680

SHA512
0ad750ab9178c866711f9c80ccc5c5fa10fe32c5bb7cef29182e85d5ca83c1f21fa4a66ea467019ca9c9d7b1aa04cd08ae30d656f9f73beeb1a635224017bd57

Download Submit
memory/1880-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1880-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4396-142-0x0000000000570000-0x000000000058A000-memory.dmp

Filesize
104KB

Download
memory/4396-144-0x0000000004B50000-0x0000000004BB6000-memory.dmp

Filesize
408KB

Download
memory/4396-145-0x00000000054E0000-0x000000000557C000-memory.dmp

Filesize
624KB

Download

Analysis

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