gurcu | b8735a6c2caa10ed5e886a60be7f2a1edb55e5d26d60b24d24af5613a8a0e474

Resubmissions

20-12-2024 17:19

241220-vvwdgazpdv 10

20-12-2024 17:17

241220-vtsk7azpb1 7

Analysis

max time kernel
23s
max time network
26s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-12-2024 17:19

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General

Target

data.exe
Size

5.6MB
MD5

d650ccbec4cef66b790c0adbd0c690ed
SHA1

7c5323641a28170edb3121d9ad15d7bf643d801d
SHA256

b8735a6c2caa10ed5e886a60be7f2a1edb55e5d26d60b24d24af5613a8a0e474
SHA512

332dc8e1b3952ac3b3fbcfdf1634eaf9720d6bd85e6a1f0baef0f095c97a98d288f301b774c4d041c45ea8ea5ed8e52e8d786a874b8d0ce41dd5dd25a961b535
SSDEEP

98304:6W1l27OuKr+gvhf2U9Nzm31PMoslkqXf0FvUcwti78OqJ7TPBvc8X6Uc:6jOuK6mn9NzgMoYkSIvUcwti7TQlvciE

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(0.25%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 family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	conhost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	data.exe

Executes dropped EXE 1 IoCs

pid	Process
2752	conhost.exe

Loads dropped DLL 2 IoCs

pid	Process
1552	data.exe
2752	conhost.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AdobeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\AdobeUpdater\\conhost.exe"	reg.exe

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

Web Service

T1102

flow	ioc
10	raw.githubusercontent.com
11	raw.githubusercontent.com
22	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
6	ip-api.com

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
4536	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	conhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	conhost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2992	timeout.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3952	reg.exe

Suspicious behavior: EnumeratesProcesses 55 IoCs

pid	Process
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
1552	data.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe
2752	conhost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1552	data.exe
Token: SeDebugPrivilege	4536	tasklist.exe
Token: SeDebugPrivilege	2752	conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2752	conhost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 3772	1552	data.exe	83
PID 1552 wrote to memory of 3772	1552	data.exe	83
PID 3772 wrote to memory of 1108	3772	cmd.exe	85
PID 3772 wrote to memory of 1108	3772	cmd.exe	85
PID 3772 wrote to memory of 4536	3772	cmd.exe	86
PID 3772 wrote to memory of 4536	3772	cmd.exe	86
PID 3772 wrote to memory of 468	3772	cmd.exe	87
PID 3772 wrote to memory of 468	3772	cmd.exe	87
PID 3772 wrote to memory of 2992	3772	cmd.exe	88
PID 3772 wrote to memory of 2992	3772	cmd.exe	88
PID 3772 wrote to memory of 2752	3772	cmd.exe	89
PID 3772 wrote to memory of 2752	3772	cmd.exe	89
PID 2752 wrote to memory of 1188	2752	conhost.exe	90
PID 2752 wrote to memory of 1188	2752	conhost.exe	90
PID 1188 wrote to memory of 3952	1188	cmd.exe	92
PID 1188 wrote to memory of 3952	1188	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\data.exe
"C:\Users\Admin\AppData\Local\Temp\data.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1552
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpCCA6.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpCCA6.tmp.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3772
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1108
- - C:\Windows\system32\tasklist.exe
    Tasklist /fi "PID eq 1552"
    3⤵
    - Enumerates processes with tasklist
    - Suspicious use of AdjustPrivilegeToken
    PID:4536
- - C:\Windows\system32\find.exe
    find ":"
    3⤵
    PID:468
- - C:\Windows\system32\timeout.exe
    Timeout /T 1 /Nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:2992
- - C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe
    "C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.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:2752
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v AdobeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1188
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v AdobeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:3952

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

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\tmpCCA6.tmp.bat

Filesize
269B

MD5
e6543df61f23d9e32ce46be846ac10d8

SHA1
ba851454c8f79bad65c0cf7433827c0eb7b43dad

SHA256
6e5c85e23151c1eece0419f03c681fc6384229c04eb3e9c5db264e1ebf6a819c

SHA512
8f9e69a0073a7ef8482f0e6947e1e2210d5ca51486883ba5a2726d4e610a9084ec44bcde2367553c94a25e6354584022d5e25b9a4a6ec900c0c607d61d7009ea

Download Submit
C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe

Filesize
5.6MB

MD5
d650ccbec4cef66b790c0adbd0c690ed

SHA1
7c5323641a28170edb3121d9ad15d7bf643d801d

SHA256
b8735a6c2caa10ed5e886a60be7f2a1edb55e5d26d60b24d24af5613a8a0e474

SHA512
332dc8e1b3952ac3b3fbcfdf1634eaf9720d6bd85e6a1f0baef0f095c97a98d288f301b774c4d041c45ea8ea5ed8e52e8d786a874b8d0ce41dd5dd25a961b535

Download Submit
memory/1552-7-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

Filesize
10.8MB

Download
memory/1552-0-0x00007FFBAC563000-0x00007FFBAC565000-memory.dmp

Filesize
8KB

Download
memory/1552-8-0x00000286DF590000-0x00000286DF5AE000-memory.dmp

Filesize
120KB

Download
memory/1552-9-0x00000286DF5B0000-0x00000286DF5BA000-memory.dmp

Filesize
40KB

Download
memory/1552-13-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

Filesize
10.8MB

Download
memory/1552-6-0x00000286F9670000-0x00000286F96E6000-memory.dmp

Filesize
472KB

Download
memory/1552-1-0x00000286DEBC0000-0x00000286DF162000-memory.dmp

Filesize
5.6MB

Download
memory/2752-20-0x0000028ECEF60000-0x0000028ECEFCA000-memory.dmp

Filesize
424KB

Download
memory/2752-22-0x0000028ECEFD0000-0x0000028ECF082000-memory.dmp

Filesize
712KB

Download
memory/2752-23-0x0000028ECF0D0000-0x0000028ECF120000-memory.dmp

Filesize
320KB

Download
memory/2752-24-0x0000028ECF120000-0x0000028ECF142000-memory.dmp

Filesize
136KB

Download
memory/2752-26-0x0000028ECF390000-0x0000028ECF3CA000-memory.dmp

Filesize
232KB

Download
memory/2752-27-0x0000028ECF350000-0x0000028ECF376000-memory.dmp

Filesize
152KB

Download
memory/2752-28-0x0000028ECFFB0000-0x0000028ED02DE000-memory.dmp

Filesize
3.2MB

Download
memory/2752-47-0x0000028ED0300000-0x0000028ED0312000-memory.dmp

Filesize
72KB

Download