3617d444e42fa974e1d19b92734c61ee39cc4f9b87063c8a05285080675b0eb5

Analysis

max time kernel
140s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2025, 05:02

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General

Target

Device/HarddiskVolume3/Users/cijythomas/AppData/Local/Temp/VGnVC/RxvUgid.exe
Size

331KB
MD5

4070c1b2f119349afed9083deb6227cb
SHA1

df2fa904a5c7ac697acbc26f4b14825593c4e38c
SHA256

a61f108406734cdba760fd0f7e366fde2c5746bdbedd69ac16aa4553f3e09938
SHA512

f9de3fe0f0df7f5e601f0245a5f37c0f312755e0256423df97f1b89daeca032bdad35c6fbd430e2c4be56a0ec29202bd2a7e4171fbf7abf6b29308258c10325d
SSDEEP

6144:hhrZyfh3Ja/H2YTxpJrY/Lhr3iaYhmQL7Zwb7:frZyfRJa/H26xpJc/ZSaYht/Zw

Score

9^/10

cryptone discovery packer persistence

Malware Config

Signatures

CryptOne packer 12 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

resource	yara_rule
behavioral2/memory/880-1-0x0000000000400000-0x0000000000429000-memory.dmp	cryptone
behavioral2/memory/880-3-0x0000000000400000-0x0000000000429000-memory.dmp	cryptone
behavioral2/memory/880-5-0x0000000000400000-0x0000000000429000-memory.dmp	cryptone
behavioral2/memory/4884-6-0x00000000012D0000-0x00000000012F9000-memory.dmp	cryptone
behavioral2/memory/880-9-0x0000000000400000-0x0000000000429000-memory.dmp	cryptone
behavioral2/memory/2936-13-0x00000000003F0000-0x0000000000419000-memory.dmp	cryptone
behavioral2/memory/4884-14-0x00000000012D0000-0x00000000012F9000-memory.dmp	cryptone
behavioral2/memory/2936-15-0x00000000003F0000-0x0000000000419000-memory.dmp	cryptone
behavioral2/memory/4884-21-0x00000000012D0000-0x00000000012F9000-memory.dmp	cryptone
behavioral2/memory/2936-17-0x00000000003F0000-0x0000000000419000-memory.dmp	cryptone
behavioral2/memory/2936-16-0x00000000003F0000-0x0000000000419000-memory.dmp	cryptone
behavioral2/memory/880-23-0x0000000000400000-0x0000000000429000-memory.dmp	cryptone

Deletes itself 1 IoCs

pid	Process
2936	mspaint.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-869607583-2483572573-2297019986-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe System Incorporated = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Adobe\\Reader_sl.exe"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-869607583-2483572573-2297019986-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Erepet = "C:\\Users\\Admin\\AppData\\Roaming\\Identities\\Erepet.exe"	mspaint.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\G:	svchost.exe
File opened (read-only)	\??\K:	svchost.exe
File opened (read-only)	\??\T:	svchost.exe
File opened (read-only)	\??\W:	svchost.exe
File opened (read-only)	\??\F:	mspaint.exe
File opened (read-only)	\??\I:	svchost.exe
File opened (read-only)	\??\L:	svchost.exe
File opened (read-only)	\??\O:	svchost.exe
File opened (read-only)	\??\P:	svchost.exe
File opened (read-only)	\??\S:	svchost.exe
File opened (read-only)	\??\U:	svchost.exe
File opened (read-only)	\??\Y:	svchost.exe
File opened (read-only)	\??\D:	mspaint.exe
File opened (read-only)	\??\B:	svchost.exe
File opened (read-only)	\??\J:	svchost.exe
File opened (read-only)	\??\N:	svchost.exe
File opened (read-only)	\??\X:	svchost.exe
File opened (read-only)	\??\Z:	svchost.exe
File opened (read-only)	\??\H:	svchost.exe
File opened (read-only)	\??\M:	svchost.exe
File opened (read-only)	\??\Q:	svchost.exe
File opened (read-only)	\??\R:	svchost.exe
File opened (read-only)	\??\V:	svchost.exe
File opened (read-only)	\??\E:	svchost.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1840 set thread context of 880	1840	RxvUgid.exe	98
PID 880 set thread context of 1248	880	RxvUgid.exe	102

System Location Discovery: System Language Discovery 1 TTPs 5 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	RxvUgid.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RxvUgid.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mspaint.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1840	RxvUgid.exe
1840	RxvUgid.exe
1840	RxvUgid.exe
1840	RxvUgid.exe
4884	svchost.exe
4884	svchost.exe
1248	RxvUgid.exe
1248	RxvUgid.exe
1248	RxvUgid.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	RxvUgid.exe
Token: SeDebugPrivilege	4884	svchost.exe
Token: SeDebugPrivilege	3920	calc.exe
Token: SeDebugPrivilege	2936	mspaint.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 1840 wrote to memory of 880	1840	RxvUgid.exe	98
PID 880 wrote to memory of 4884	880	RxvUgid.exe	99
PID 880 wrote to memory of 4884	880	RxvUgid.exe	99
PID 880 wrote to memory of 4884	880	RxvUgid.exe	99
PID 880 wrote to memory of 4884	880	RxvUgid.exe	99
PID 880 wrote to memory of 3920	880	RxvUgid.exe	100
PID 880 wrote to memory of 3920	880	RxvUgid.exe	100
PID 880 wrote to memory of 3920	880	RxvUgid.exe	100
PID 880 wrote to memory of 3920	880	RxvUgid.exe	100
PID 880 wrote to memory of 3920	880	RxvUgid.exe	100
PID 4884 wrote to memory of 2936	4884	svchost.exe	101
PID 4884 wrote to memory of 2936	4884	svchost.exe	101
PID 4884 wrote to memory of 2936	4884	svchost.exe	101
PID 4884 wrote to memory of 2936	4884	svchost.exe	101
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 880 wrote to memory of 1248	880	RxvUgid.exe	102
PID 1248 wrote to memory of 4884	1248	RxvUgid.exe	99
PID 1248 wrote to memory of 4884	1248	RxvUgid.exe	99
PID 1248 wrote to memory of 3920	1248	RxvUgid.exe	100
PID 1248 wrote to memory of 3920	1248	RxvUgid.exe	100
PID 1248 wrote to memory of 2936	1248	RxvUgid.exe	101
PID 1248 wrote to memory of 2936	1248	RxvUgid.exe	101

C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe
"C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe
  "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:880
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Windows\SysWOW64\svchost.exe"
    3⤵
    - Adds Run key to start application
    - Enumerates connected drives
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4884
  - - C:\Windows\SysWOW64\mspaint.exe
      "C:\Windows\SysWOW64\mspaint.exe"
      4⤵
      Deletes itself
      Adds Run key to start application
      Enumerates connected drives
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      PID:2936
- - C:\Windows\SysWOW64\calc.exe
    "C:\Windows\SysWOW64\calc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3920
- - C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe
    "C:\Users\Admin\AppData\Local\Temp\Device\HarddiskVolume3\Users\cijythomas\AppData\Local\Temp\VGnVC\RxvUgid.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1248

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

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/880-1-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/880-3-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/880-5-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/880-9-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/880-23-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/1248-30-0x0000000002160000-0x00000000021AE000-memory.dmp

Filesize
312KB

Download
memory/1248-31-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1248-26-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1248-22-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1840-0-0x0000000000BA0000-0x0000000000BB4000-memory.dmp

Filesize
80KB

Download
memory/2936-20-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-38-0x0000000000430000-0x000000000047E000-memory.dmp

Filesize
312KB

Download
memory/2936-17-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-16-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-44-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-15-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-41-0x0000000000430000-0x000000000047E000-memory.dmp

Filesize
312KB

Download
memory/2936-13-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-40-0x0000000000430000-0x000000000047E000-memory.dmp

Filesize
312KB

Download
memory/2936-18-0x00000000003F0000-0x0000000000419000-memory.dmp

Filesize
164KB

Download
memory/2936-29-0x0000000000430000-0x000000000047E000-memory.dmp

Filesize
312KB

Download
memory/2936-36-0x0000000000430000-0x000000000047E000-memory.dmp

Filesize
312KB

Download
memory/3920-35-0x0000000002550000-0x000000000259E000-memory.dmp

Filesize
312KB

Download
memory/3920-28-0x0000000002550000-0x000000000259E000-memory.dmp

Filesize
312KB

Download
memory/3920-7-0x0000000000A00000-0x0000000000A02000-memory.dmp

Filesize
8KB

Download
memory/3920-46-0x0000000000A00000-0x0000000000A02000-memory.dmp

Filesize
8KB

Download
memory/4884-34-0x0000000001310000-0x000000000135E000-memory.dmp

Filesize
312KB

Download
memory/4884-6-0x00000000012D0000-0x00000000012F9000-memory.dmp

Filesize
164KB

Download
memory/4884-27-0x0000000001310000-0x000000000135E000-memory.dmp

Filesize
312KB

Download
memory/4884-14-0x00000000012D0000-0x00000000012F9000-memory.dmp

Filesize
164KB

Download
memory/4884-21-0x00000000012D0000-0x00000000012F9000-memory.dmp

Filesize
164KB

Download