gurcu | 13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
29-10-2024 20:09

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe
Size

1.6MB
MD5

9d8b111c3743b5b77fdd8fce1e30b50c
SHA1

963e2bb076141300843bc8b61d6808ebd7a6dfae
SHA256

13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2
SHA512

0a916cd6c28b71e342aa4c4d2f06253b3b89913ecce33b7776179d4e88f7e925712801265c6a7ebd440874e4226a16988155ebb8cccb3cb37c298276df2a063f
SSDEEP

24576:RRVHmGd0BwUzR+frsjqz86M0/i/U7vqqp:VGGd4NzSrsjqzh/i/kvfp

Score

10^/10

gurcu xworm execution rat stealer trojan

Malware Config

Extracted

Family

xworm

146.190.110.91:3389

Attributes

Install_directory
%AppData%
install_file
svchost.exe
telegram
https://api.telegram.org/bot7558158256:AAEHTwnKaP3Xe69dD2Vmm9pirMBLikK6uhw/sendMessage?chat_id=8071457805

Extracted

Family

gurcu

https://api.telegram.org/bot7558158256:AAEHTwnKaP3Xe69dD2Vmm9pirMBLikK6uhw/sendMessage?chat_id=8071457805

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0002000000022efc-19.dat	family_xworm
behavioral2/memory/4872-29-0x0000000000090000-0x00000000000A6000-memory.dmp	family_xworm

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4236	powershell.exe
2232	powershell.exe
1072	powershell.exe
2292	powershell.exe
1660	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	msedgewebview2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	svchost.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\msedgewebview2.exe.lnk	msedgewebview2.exe

Executes dropped EXE 4 IoCs

pid	Process
4424	SilverBulletPro.exe
4872	svchost.exe
4428	msedgewebview2.exe
2124	msedgewebview2.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1012	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2768	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4872	svchost.exe
2124	msedgewebview2.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
4236	powershell.exe
4236	powershell.exe
2232	powershell.exe
2232	powershell.exe
1072	powershell.exe
1072	powershell.exe
2292	powershell.exe
2292	powershell.exe
4872	svchost.exe
1660	powershell.exe
1660	powershell.exe
1660	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	svchost.exe
Token: SeDebugPrivilege	4236	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	1072	powershell.exe
Token: SeDebugPrivilege	2292	powershell.exe
Token: SeDebugPrivilege	4428	msedgewebview2.exe
Token: SeDebugPrivilege	1660	powershell.exe
Token: SeDebugPrivilege	2124	msedgewebview2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4872	svchost.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3152 wrote to memory of 4424	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	89
PID 3152 wrote to memory of 4424	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	89
PID 3152 wrote to memory of 4872	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	90
PID 3152 wrote to memory of 4872	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	90
PID 4872 wrote to memory of 4236	4872	svchost.exe	93
PID 4872 wrote to memory of 4236	4872	svchost.exe	93
PID 4872 wrote to memory of 2232	4872	svchost.exe	95
PID 4872 wrote to memory of 2232	4872	svchost.exe	95
PID 4872 wrote to memory of 1072	4872	svchost.exe	98
PID 4872 wrote to memory of 1072	4872	svchost.exe	98
PID 4872 wrote to memory of 2292	4872	svchost.exe	100
PID 4872 wrote to memory of 2292	4872	svchost.exe	100
PID 3152 wrote to memory of 4428	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	102
PID 3152 wrote to memory of 4428	3152	13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe	102
PID 4428 wrote to memory of 2768	4428	msedgewebview2.exe	105
PID 4428 wrote to memory of 2768	4428	msedgewebview2.exe	105
PID 4428 wrote to memory of 1660	4428	msedgewebview2.exe	106
PID 4428 wrote to memory of 1660	4428	msedgewebview2.exe	106
PID 4428 wrote to memory of 2124	4428	msedgewebview2.exe	109
PID 4428 wrote to memory of 2124	4428	msedgewebview2.exe	109
PID 4428 wrote to memory of 2352	4428	msedgewebview2.exe	110
PID 4428 wrote to memory of 2352	4428	msedgewebview2.exe	110
PID 2352 wrote to memory of 1012	2352	cmd.exe	112
PID 2352 wrote to memory of 1012	2352	cmd.exe	112

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe
"C:\Users\Admin\AppData\Local\Temp\13804a9b2b635d274228778d41f850ad20e25573075c03315a1aed980f9305b2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Users\Admin\AppData\Local\Temp\SilverBulletPro.exe
  "C:\Users\Admin\AppData\Local\Temp\SilverBulletPro.exe"
  2⤵
  - Executes dropped EXE
  PID:4424
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4872
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4236
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2232
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1072
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2292
- C:\ProgramData\msedgewebview2.exe
  "C:\ProgramData\msedgewebview2.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4428
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks.exe" /create /tn msedgewebview2 /tr "C:\Users\Admin\AppData\Local\msedgewebview2\msedgewebview2.exe" /st 20:14 /du 23:59 /sc daily /ri 1 /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2768
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\msedgewebview2'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1660
- - C:\Users\Admin\AppData\Local\msedgewebview2\msedgewebview2.exe
    "C:\Users\Admin\AppData\Local\msedgewebview2\msedgewebview2.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of AdjustPrivilegeToken
    PID:2124
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF433.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2352
  - - C:\Windows\system32\timeout.exe
      timeout 6
      4⤵
      Delays execution with timeout.exe
      PID:1012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\msedgewebview2.exe.log

Filesize
660B

MD5
1c5e1d0ff3381486370760b0f2eb656b

SHA1
f9df6be8804ef611063f1ff277e323b1215372de

SHA256
f424c891fbc7385e9826beed2dd8755aeac5495744b5de0a1e370891a7beaf7a

SHA512
78f5fc40a185d04c9e4a02a3d1b10b4bd684c579a45a0d1e8f49f8dee9018ed7bc8875cbf21f98632f93ead667214a41904226ce54817b85caeeb4b0de54a743

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2d06ce10e4e5b9e174b5ebbdad300fad

SHA1
bcc1c231e22238cef02ae25331320060ada2f131

SHA256
87d1dd56f12a88907ba5aebca8d555443d6f77ed214497277cc8bcd31c669f2c

SHA512
38cfbeb59605854ae4fcfae8619a6b26bd916148acfb5636383672a3960b45ca41fed5c241f97465129e92eaf78c4c85dcf258f1ab501a2bf771287ce04f76a7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
e3161f4edbc9b963debe22e29658050b

SHA1
45dbf88dadafe5dd1cfee1e987c8a219d3208cdb

SHA256
1359d6daeaed2f254b162914203c891b23139cc236a3bf75c2dfcbe26265c84a

SHA512
006ffb8f37d1f77f8ee79b22ffa413819f565d62773c632b70985759572121c6ab4743139d16d885f8c0ff9d0e0b136686741728b3e142ee54aea3bb733dffb2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
1de9e2252e7a01131b4e7f2960efeb41

SHA1
39b84bd90c13c97185ab20b9fa973e113d2053d3

SHA256
e1e8f346075003d30042c8eba065f3c27585d12a31ecccae84c9e94385d077ab

SHA512
0726b3f4a20726344f9b29a77a49c5274603b3db411544da56cd716c3524b9e4d8679e2e09da01e34a34d6d9f117b943d2188e2a8e799af7ea66cc384185135b

Download Submit
C:\Users\Admin\AppData\Local\Temp\SilverBulletPro.exe

Filesize
602KB

MD5
347d21e54202cc42486f1be0f38ebea1

SHA1
f3a17fd7d1581928d8bf773c0f99433da64253db

SHA256
80e06ccb6370aca19137d47b6ecf3256d6a34b67a3d4bf0b7c3190a1c5feacad

SHA512
620f6318b95253cee873b21b90bdc8f75fb32c30bc42032b9eed5773890a700e66ca3f27f2418bb6b39c8a33f2dea718c2215852e64063e0187131be841950b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kbf1cfd4.dnd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF433.tmp.cmd

Filesize
147B

MD5
7c3732eade5a9768df84737eacf39032

SHA1
69b33dcf08fba35bdc904408701c6b1d78585a41

SHA256
ff51d0e40d13ca40aa491284ebe3c9e87f6d64e6deec3112981fe2054bfa4714

SHA512
0df239352b726fc28f9e7e47a24aece835e3dfae0fefceeff7494a68aff33aac0aa832b968abe7bbf4ffe965f619b76b3986707c1e161a037cd64548ee436d81

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

Filesize
65KB

MD5
36dde308d5e09405a94dad6844ca0c44

SHA1
c585d502f48206f767f97ac7f7acd4112c314ccc

SHA256
c901ffc47365a32dcb7e1981386cc0d60833bab6addfc88b813a5a8cdc4fb11b

SHA512
5964d137c5b510ae978b331161bc20c7ecfd4a35aa6c65c4d95a13c8568f774a483807c4ca555e3559a83712421c811d1af18f7aa2981367129244c1bfc74923

Download Submit
memory/3152-4-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/3152-1-0x0000000000C60000-0x0000000000DF6000-memory.dmp

Filesize
1.6MB

Download
memory/3152-87-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

Filesize
8KB

Download
memory/3152-88-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/3152-0-0x00007FFD78113000-0x00007FFD78115000-memory.dmp

Filesize
8KB

Download
memory/3152-94-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-40-0x000001FDD2860000-0x000001FDD2882000-memory.dmp

Filesize
136KB

Download
memory/4428-93-0x000001AC46490000-0x000001AC464D2000-memory.dmp

Filesize
264KB

Download
memory/4872-95-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4872-30-0x00007FFD78110000-0x00007FFD78BD1000-memory.dmp

Filesize
10.8MB

Download
memory/4872-29-0x0000000000090000-0x00000000000A6000-memory.dmp

Filesize
88KB

Download