gurcu | 56747e2199faa9d6a532d07432f7f784f1ab773bfbae4bc2c4384574c035a260

Analysis

max time kernel
293s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-10-2024 17:51

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General

Target

Luxury Crypter‌.exe
Size

7.0MB
MD5

f52edee9472d973f7aedaa58baed96e6
SHA1

dee4734806f0a47e81627a66b2c75e5ec37b6b1a
SHA256

56747e2199faa9d6a532d07432f7f784f1ab773bfbae4bc2c4384574c035a260
SHA512

1568f66ea43208900e1800ac59946f92d426d05d00783decdce31eb088ec54cd467adf640e5b2a5388f5ee6ccd2840dfe551f9ae18c06b168a469ec18a85ef0b
SSDEEP

98304:bmurSHFk4vh9IWa/LP3Nm9Zlxne1uxetbDEgovbddnY6Jy3yH/O:b6m7P3Nm9ZWiADEp5F0R

Score

10^/10

gurcu xworm discovery 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/bot7023899363:AAFEzgbfWzhyE32Lf95TKSRYEYXMd4AfMyk/sendMessage?chat_id=6354844663

Extracted

Family

gurcu

https://api.telegram.org/bot7023899363:AAFEzgbfWzhyE32Lf95TKSRYEYXMd4AfMyk/sendMessage?chat_id=6354844663

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/files/0x00070000000234a3-18.dat	family_xworm
behavioral3/memory/3636-27-0x0000000000150000-0x0000000000166000-memory.dmp	family_xworm

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

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
3144	powershell.exe
2092	powershell.exe
5088	powershell.exe
3248	powershell.exe
3588	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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	msedgewebview2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	Luxury Crypter‌.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 5 IoCs

pid	Process
2852	Luxury Crypter.exe
3636	svchost.exe
1336	msedgewebview2.exe
548	msedgewebview2.exe
1940	msedgewebview2.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
228	2852	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Luxury Crypter.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1464	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
4156	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
3636	svchost.exe
548	msedgewebview2.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3144	powershell.exe
3144	powershell.exe
2092	powershell.exe
2092	powershell.exe
5088	powershell.exe
5088	powershell.exe
3248	powershell.exe
3248	powershell.exe
3636	svchost.exe
3588	powershell.exe
3588	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3636	svchost.exe
Token: SeDebugPrivilege	3144	powershell.exe
Token: SeDebugPrivilege	2092	powershell.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeDebugPrivilege	3248	powershell.exe
Token: SeDebugPrivilege	3636	svchost.exe
Token: SeDebugPrivilege	1336	msedgewebview2.exe
Token: SeDebugPrivilege	3588	powershell.exe
Token: SeDebugPrivilege	548	msedgewebview2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3636	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1572 wrote to memory of 2852	1572	Luxury Crypter‌.exe	82
PID 1572 wrote to memory of 2852	1572	Luxury Crypter‌.exe	82
PID 1572 wrote to memory of 2852	1572	Luxury Crypter‌.exe	82
PID 1572 wrote to memory of 3636	1572	Luxury Crypter‌.exe	83
PID 1572 wrote to memory of 3636	1572	Luxury Crypter‌.exe	83
PID 3636 wrote to memory of 3144	3636	svchost.exe	87
PID 3636 wrote to memory of 3144	3636	svchost.exe	87
PID 3636 wrote to memory of 2092	3636	svchost.exe	89
PID 3636 wrote to memory of 2092	3636	svchost.exe	89
PID 3636 wrote to memory of 5088	3636	svchost.exe	91
PID 3636 wrote to memory of 5088	3636	svchost.exe	91
PID 3636 wrote to memory of 3248	3636	svchost.exe	93
PID 3636 wrote to memory of 3248	3636	svchost.exe	93
PID 1572 wrote to memory of 1336	1572	Luxury Crypter‌.exe	96
PID 1572 wrote to memory of 1336	1572	Luxury Crypter‌.exe	96
PID 1336 wrote to memory of 4156	1336	msedgewebview2.exe	97
PID 1336 wrote to memory of 4156	1336	msedgewebview2.exe	97
PID 1336 wrote to memory of 3588	1336	msedgewebview2.exe	98
PID 1336 wrote to memory of 3588	1336	msedgewebview2.exe	98
PID 1336 wrote to memory of 548	1336	msedgewebview2.exe	106
PID 1336 wrote to memory of 548	1336	msedgewebview2.exe	106
PID 1336 wrote to memory of 1892	1336	msedgewebview2.exe	109
PID 1336 wrote to memory of 1892	1336	msedgewebview2.exe	109
PID 1892 wrote to memory of 1464	1892	cmd.exe	111
PID 1892 wrote to memory of 1464	1892	cmd.exe	111

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\Luxury Crypter‌.exe
"C:\Users\Admin\AppData\Local\Temp\Luxury Crypter‌.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1572
- C:\Users\Admin\AppData\Local\Temp\Luxury Crypter.exe
  "C:\Users\Admin\AppData\Local\Temp\Luxury Crypter.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2852
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2852 -s 788
    3⤵
    - Program crash
    PID:228
- 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:3636
- - 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:3144
- - 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:2092
- - 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:5088
- - 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:3248
- 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:1336
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks.exe" /create /tn msedgewebview2 /tr "C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe" /st 17:57 /du 23:59 /sc daily /ri 1 /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4156
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\ACCApi'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3588
- - C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe
    "C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of AdjustPrivilegeToken
    PID:548
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2006.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1892
  - - C:\Windows\system32\timeout.exe
      timeout 6
      4⤵
      Delays execution with timeout.exe
      PID:1464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2852 -ip 2852
1⤵
PID:1780

C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe
C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe
1⤵
- Executes dropped EXE
PID:1940

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
67e8893616f805af2411e2f4a1411b2a

SHA1
39bf1e1a0ddf46ce7c136972120f512d92827dcd

SHA256
ca0dfe104c1bf27f7e01999fcdabc16c6400c3da937c832c26bdbca322381d31

SHA512
164e911a9935e75c8be1a6ec3d31199a16ba2a1064da6c09d771b2a38dd7fddd142301ef55d67d90f306d3a454a1ce7b72e129ea42e44500b9b8c623a8d98b4d

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

Filesize
944B

MD5
98baf5117c4fcec1692067d200c58ab3

SHA1
5b33a57b72141e7508b615e17fb621612cb8e390

SHA256
30bf8496e9a08f4fdfe4767abcd565f92b6da06ca1c7823a70cb7cab16262e51

SHA512
344a70bfc037d54176f12db91f05bf4295bb587a5062fd1febe6f52853571170bd8ef6042cb87b893185bbae1937cf77b679d7970f8cc1c2666b0b7c1b32987d

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

Filesize
8.8MB

MD5
9c55d8c0b720f652e4ad3753e9939b99

SHA1
ee69da72e65d44638f352791b2114887e2110384

SHA256
44a220f92ce2822d3d8e9c7ded429c9e53f650224759c8ec75c49706716fda77

SHA512
ea88bcf9b289ef4b2ba34f3b7818aee672867418d4e8fb29d5fac99688e30babfc21a7279151397ef47f8d852b8129ed63a42eec7e1a5bd598c744af9da320b7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ndg4myt4.3nb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2006.tmp.cmd

Filesize
147B

MD5
d9c5b2945fc39972b60ddbfeab1d1c3e

SHA1
1230e62ae55816fa5236a7c6c3c9d1a0db471c0b

SHA256
23aa2fd794f345bc050fda3ee87b40f3bd93e52f43d24b4e3d3a40a7655f5dd5

SHA512
a09ad13a96e16bf4bb8f2721a8287f59d6a40f72ceca3edaf2c194a0f8145c76cb6660833c7803b344f4110dcf5678ec66d2850a79edc17a5997c9a35321e23d

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

Filesize
67KB

MD5
39f4793e3bd69fde3059e02b84875bef

SHA1
4ae174ff10e05e7946c6220b2ef7565830596b3c

SHA256
eee698d53132459d85ad39ef66c6b33769dbf69469a346a1ea26c13eebfb4102

SHA512
4642ba370d794ffc0dac13a84f8ea3501f9a88a0d2584daecbb340b92cce1dd14c46b7d9d5f4a27a60c1365584f995aa7e93fdc70c4775425f5b3590f6eeec50

Download Submit
memory/1336-94-0x0000023703980000-0x00000237039C2000-memory.dmp

Filesize
264KB

Download
memory/1572-1-0x0000000000D80000-0x0000000001488000-memory.dmp

Filesize
7.0MB

Download
memory/1572-78-0x00007FFAA7F43000-0x00007FFAA7F45000-memory.dmp

Filesize
8KB

Download
memory/1572-88-0x00007FFAA7F40000-0x00007FFAA8A01000-memory.dmp

Filesize
10.8MB

Download
memory/1572-4-0x00007FFAA7F40000-0x00007FFAA8A01000-memory.dmp

Filesize
10.8MB

Download
memory/1572-0-0x00007FFAA7F43000-0x00007FFAA7F45000-memory.dmp

Filesize
8KB

Download
memory/1572-95-0x00007FFAA7F40000-0x00007FFAA8A01000-memory.dmp

Filesize
10.8MB

Download
memory/2852-29-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/2852-30-0x0000000000B40000-0x000000000141A000-memory.dmp

Filesize
8.9MB

Download
memory/3144-40-0x0000026149280000-0x00000261492A2000-memory.dmp

Filesize
136KB

Download
memory/3636-28-0x00007FFAA7F40000-0x00007FFAA8A01000-memory.dmp

Filesize
10.8MB

Download
memory/3636-89-0x00007FFAA7F40000-0x00007FFAA8A01000-memory.dmp

Filesize
10.8MB

Download
memory/3636-27-0x0000000000150000-0x0000000000166000-memory.dmp

Filesize
88KB

Download
memory/3636-124-0x000000001ADE0000-0x000000001ADEC000-memory.dmp

Filesize
48KB

Download