gurcu | 56747e2199faa9d6a532d07432f7f784f1ab773bfbae4bc2c4384574c035a260

Analysis

max time kernel
292s
max time network
296s
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 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
behavioral4/files/0x000300000002aa7c-18.dat	family_xworm
behavioral4/memory/1824-26-0x0000000000FF0000-0x0000000001006000-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
2276	powershell.exe
2864	powershell.exe
4104	powershell.exe
1156	powershell.exe
1016	powershell.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
5068	Luxury Crypter.exe
1824	svchost.exe
4836	msedgewebview2.exe
408	msedgewebview2.exe
380	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
3112	5068	WerFault.exe	79

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
2540	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
1140	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
1824	svchost.exe
408	msedgewebview2.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1016	powershell.exe
1016	powershell.exe
2276	powershell.exe
2276	powershell.exe
2864	powershell.exe
2864	powershell.exe
4104	powershell.exe
4104	powershell.exe
1824	svchost.exe
1156	powershell.exe
1156	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	svchost.exe
Token: SeDebugPrivilege	1016	powershell.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	2864	powershell.exe
Token: SeDebugPrivilege	4104	powershell.exe
Token: SeDebugPrivilege	1824	svchost.exe
Token: SeDebugPrivilege	4836	msedgewebview2.exe
Token: SeDebugPrivilege	1156	powershell.exe
Token: SeDebugPrivilege	408	msedgewebview2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1824	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 744 wrote to memory of 5068	744	Luxury Crypter‌.exe	79
PID 744 wrote to memory of 5068	744	Luxury Crypter‌.exe	79
PID 744 wrote to memory of 5068	744	Luxury Crypter‌.exe	79
PID 744 wrote to memory of 1824	744	Luxury Crypter‌.exe	80
PID 744 wrote to memory of 1824	744	Luxury Crypter‌.exe	80
PID 1824 wrote to memory of 1016	1824	svchost.exe	84
PID 1824 wrote to memory of 1016	1824	svchost.exe	84
PID 1824 wrote to memory of 2276	1824	svchost.exe	86
PID 1824 wrote to memory of 2276	1824	svchost.exe	86
PID 1824 wrote to memory of 2864	1824	svchost.exe	88
PID 1824 wrote to memory of 2864	1824	svchost.exe	88
PID 1824 wrote to memory of 4104	1824	svchost.exe	90
PID 1824 wrote to memory of 4104	1824	svchost.exe	90
PID 744 wrote to memory of 4836	744	Luxury Crypter‌.exe	92
PID 744 wrote to memory of 4836	744	Luxury Crypter‌.exe	92
PID 4836 wrote to memory of 1156	4836	msedgewebview2.exe	94
PID 4836 wrote to memory of 1156	4836	msedgewebview2.exe	94
PID 4836 wrote to memory of 1140	4836	msedgewebview2.exe	96
PID 4836 wrote to memory of 1140	4836	msedgewebview2.exe	96
PID 4836 wrote to memory of 408	4836	msedgewebview2.exe	98
PID 4836 wrote to memory of 408	4836	msedgewebview2.exe	98
PID 4836 wrote to memory of 2452	4836	msedgewebview2.exe	99
PID 4836 wrote to memory of 2452	4836	msedgewebview2.exe	99
PID 2452 wrote to memory of 2540	2452	cmd.exe	101
PID 2452 wrote to memory of 2540	2452	cmd.exe	101

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⤵
- Suspicious use of WriteProcessMemory
PID:744
- 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:5068
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5068 -s 792
    3⤵
    - Program crash
    PID:3112
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - 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:1824
- - 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:1016
- - 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:2276
- - 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:2864
- - 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:4104
- C:\ProgramData\msedgewebview2.exe
  "C:\ProgramData\msedgewebview2.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4836
- - 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:1156
- - 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:1140
- - 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:408
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFAAC.tmp.cmd""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2452
  - - C:\Windows\system32\timeout.exe
      timeout 6
      4⤵
      Delays execution with timeout.exe
      PID:2540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5068 -ip 5068
1⤵
PID:4716

C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe
C:\Users\Admin\AppData\Local\ACCApi\msedgewebview2.exe
1⤵
- Executes dropped EXE
PID:380

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
284393596fdd49bebd7b861bf339b82d

SHA1
a36767dfc423b3c7fd3ff439b616862743a053c8

SHA256
0e692bcbba51ca4e766a427c9f28a7a4a9e326d2cf835493e57a9dc2121326b5

SHA512
8d3247ee0c3bf9a9fceea23eb5c646dbd8b3d954f4d62622f49070629e642d6a13bfb0d27949e2355c081d45f5a1101f05a9972782a0f0a478ed90f551d2efeb

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
bc40d8c37ce7816261293b9ed574b270

SHA1
9f9fd009081257a6050e7593873241db1def78ed

SHA256
0b60de9fe9eaa95a17fc18f9951888dbd101b0b43df2050acb4c0c2ca49c36ec

SHA512
e8669c1f32a660c63c46a4322c11072059cd9203ae8c1eb13925b0f126d83eb53a789e966ce4af19e0e79e77eafeb62a0bb90a6ea1fbb453dfc322638621f2ed

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
944B

MD5
050567a067ffea4eb40fe2eefebdc1ee

SHA1
6e1fb2c7a7976e0724c532449e97722787a00fec

SHA256
3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e

SHA512
341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

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

Filesize
944B

MD5
df808b11175970c23f00e611a7b6d2cc

SHA1
0243f099e483fcafb6838c0055982e65634b6db6

SHA256
2d5eec6aeee0c568d08cc1777a67b529dce3133efc761ef4b4643d4b2003d43d

SHA512
c7c4e39be7cb6bfda48055cd2b0b05a6b6a71131a124730f62928600a5870303e06e3db54634c45f86310413126d2524f51002d5f36f7012e41b641992b5ac89

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_fja2cgpu.rqm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
147B

MD5
5a5db229387f96a316387cd8ad97fc8e

SHA1
5f45d518150b2b930e9bdb57d185d9fd59a22df3

SHA256
31dcea62265af5f83dd0ae1628057c01d49c22780391f2b29180adac0b663a30

SHA512
635e33d440da8b7559ec79d26b7ead7488962a60d0fc4db751c482b9b753b1050731d7a9d171ca62e7029d6dc7f7010be44099f35c358e71f5527b3994e36572

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

Filesize
67KB

MD5
39f4793e3bd69fde3059e02b84875bef

SHA1
4ae174ff10e05e7946c6220b2ef7565830596b3c

SHA256
eee698d53132459d85ad39ef66c6b33769dbf69469a346a1ea26c13eebfb4102

SHA512
4642ba370d794ffc0dac13a84f8ea3501f9a88a0d2584daecbb340b92cce1dd14c46b7d9d5f4a27a60c1365584f995aa7e93fdc70c4775425f5b3590f6eeec50

Download Submit
memory/744-84-0x00007FFE30A50000-0x00007FFE31512000-memory.dmp

Filesize
10.8MB

Download
memory/744-0-0x00007FFE30A53000-0x00007FFE30A55000-memory.dmp

Filesize
8KB

Download
memory/744-91-0x00007FFE30A50000-0x00007FFE31512000-memory.dmp

Filesize
10.8MB

Download
memory/744-2-0x00007FFE30A50000-0x00007FFE31512000-memory.dmp

Filesize
10.8MB

Download
memory/744-63-0x00007FFE30A53000-0x00007FFE30A55000-memory.dmp

Filesize
8KB

Download
memory/744-1-0x0000000000FF0000-0x00000000016F8000-memory.dmp

Filesize
7.0MB

Download
memory/1016-36-0x0000027C78320000-0x0000027C78342000-memory.dmp

Filesize
136KB

Download
memory/1824-85-0x00007FFE30A50000-0x00007FFE31512000-memory.dmp

Filesize
10.8MB

Download
memory/1824-28-0x00007FFE30A50000-0x00007FFE31512000-memory.dmp

Filesize
10.8MB

Download
memory/1824-119-0x000000001BBF0000-0x000000001BBFC000-memory.dmp

Filesize
48KB

Download
memory/1824-26-0x0000000000FF0000-0x0000000001006000-memory.dmp

Filesize
88KB

Download
memory/4836-90-0x000001E1DB540000-0x000001E1DB582000-memory.dmp

Filesize
264KB

Download
memory/5068-30-0x0000000000830000-0x000000000110A000-memory.dmp

Filesize
8.9MB

Download
memory/5068-29-0x0000000074E7E000-0x0000000074E7F000-memory.dmp

Filesize
4KB

Download