blustealer | 7dbd595dd8e5d4dda3c0127e8779342c42432e27ff37ac482fca8e0c8aef32a8

General

Target

Halkbank_Ekstre_003_170635_650186.pdf.exe
Size

884KB
MD5

a7b72a295326ac2c29592434237f445c
SHA1

bcd8ffed67e7276a1799f0eba8af373cfaf39d5e
SHA256

7dbd595dd8e5d4dda3c0127e8779342c42432e27ff37ac482fca8e0c8aef32a8
SHA512

b06780ed1ceb88db634eb7b64db7e448fccb36f3e94bc35dff877c4d1db4692cc3e2fbad2b0be8f1e3c882d03b58d4363f770492bb24b1833823ad9961d64597
SSDEEP

12288:X27t+T/R/4ve4mPyLyIS8mmKVki7vkZxB6hCHevhphU:Jt4ve4mPy+IKBVk+k7B6M+JphU

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/4720-153-0x0000000000620000-0x000000000063A000-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	Halkbank_Ekstre_003_170635_650186.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

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
35	icanhazip.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 3724 set thread context of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.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
1288	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2336	powershell.exe
2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
2336	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	4720	AppLaunch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3724	Halkbank_Ekstre_003_170635_650186.pdf.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 2336	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	92
PID 2296 wrote to memory of 2336	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	92
PID 2296 wrote to memory of 2336	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	92
PID 2296 wrote to memory of 1288	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2296 wrote to memory of 1288	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2296 wrote to memory of 1288	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	94
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 2296 wrote to memory of 3724	2296	Halkbank_Ekstre_003_170635_650186.pdf.exe	96
PID 3724 wrote to memory of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.exe	97
PID 3724 wrote to memory of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.exe	97
PID 3724 wrote to memory of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.exe	97
PID 3724 wrote to memory of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.exe	97
PID 3724 wrote to memory of 4720	3724	Halkbank_Ekstre_003_170635_650186.pdf.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\Halkbank_Ekstre_003_170635_650186.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\WldQizw.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2336
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\WldQizw" /XML "C:\Users\Admin\AppData\Local\Temp\tmp36A0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1288
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_003_170635_650186.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3724
- - 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:4720

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\tmp36A0.tmp

Filesize
1KB

MD5
72935472b12dde5e1341ab10b1360178

SHA1
485c56321702afaba1c080387ddb293063392a6b

SHA256
09cc9c2a5b488dde036e67cff26f4bf0ffc15bf0407adbd5a3b6709e21dab6bd

SHA512
04fda2dcd5a2d089ba456cf2d933e1ac14e81d179fc5604867b5d4777071fa49333d9f5aad20f95d83cb113d694e5a80e6e23189ecb1a5e0be7c115a0082814c

Download Submit
memory/2296-133-0x00000000058C0000-0x0000000005E64000-memory.dmp

Filesize
5.6MB

Download
memory/2296-134-0x00000000053B0000-0x0000000005442000-memory.dmp

Filesize
584KB

Download
memory/2296-135-0x0000000005360000-0x000000000536A000-memory.dmp

Filesize
40KB

Download
memory/2296-136-0x0000000008FA0000-0x000000000903C000-memory.dmp

Filesize
624KB

Download
memory/2296-137-0x0000000009300000-0x0000000009366000-memory.dmp

Filesize
408KB

Download
memory/2296-132-0x00000000008F0000-0x00000000009D4000-memory.dmp

Filesize
912KB

Download
memory/2336-156-0x00000000750B0000-0x00000000750FC000-memory.dmp

Filesize
304KB

Download
memory/2336-148-0x00000000053B0000-0x0000000005416000-memory.dmp

Filesize
408KB

Download
memory/2336-142-0x0000000005420000-0x0000000005A48000-memory.dmp

Filesize
6.2MB

Download
memory/2336-164-0x00000000077E0000-0x00000000077E8000-memory.dmp

Filesize
32KB

Download
memory/2336-163-0x0000000007800000-0x000000000781A000-memory.dmp

Filesize
104KB

Download
memory/2336-146-0x0000000005310000-0x0000000005332000-memory.dmp

Filesize
136KB

Download
memory/2336-140-0x0000000002890000-0x00000000028C6000-memory.dmp

Filesize
216KB

Download
memory/2336-159-0x00000000074C0000-0x00000000074DA000-memory.dmp

Filesize
104KB

Download
memory/2336-151-0x00000000061C0000-0x00000000061DE000-memory.dmp

Filesize
120KB

Download
memory/2336-162-0x00000000076F0000-0x00000000076FE000-memory.dmp

Filesize
56KB

Download
memory/2336-161-0x0000000007740000-0x00000000077D6000-memory.dmp

Filesize
600KB

Download
memory/2336-160-0x0000000007530000-0x000000000753A000-memory.dmp

Filesize
40KB

Download
memory/2336-155-0x0000000006780000-0x00000000067B2000-memory.dmp

Filesize
200KB

Download
memory/2336-157-0x0000000006760000-0x000000000677E000-memory.dmp

Filesize
120KB

Download
memory/2336-158-0x0000000007B00000-0x000000000817A000-memory.dmp

Filesize
6.5MB

Download
memory/3724-147-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3724-154-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3724-144-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/3724-165-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/4720-153-0x0000000000620000-0x000000000063A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads