4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
11/10/2022, 14:40

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General

Target

4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
Size

284KB
MD5

12134afc08cc6eec52ab045a27ccc557
SHA1

84e3f1278c9c79d4312a4d10178e0d12da3dda98
SHA256

4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71
SHA512

7cea96310c64b634900e8f74d8575dee45f4fa3f69b0f0528876c1a6a62b8e071e0632d7455f6c3d088efbcbdc69bd041665d2bd2ee8bf947389e4dd0f83209b
SSDEEP

3072:mSQ0EWVwZhKxC5Rt+k60Zh+qw6PYSsszfHZTZJ2lC:mPA6wxmuJspr2l

Score

8^/10

persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\16264 = "C:\\PROGRA~3\\LOCALS~1\\Temp\\msvdlk.exe"	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
2356	skyrpe.exe
3668	skyrpe.exe
1504	skyrpe.exe

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4964-135-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4964-137-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4964-138-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4964-141-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4964-150-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3668-163-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4964-165-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3668-168-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Checks computer location settings 2 TTPs 1 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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Skype = "C:\\Users\\Admin\\AppData\\Roaming\\skype\\skyrpe.exe"	reg.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\disk\enum	skyrpe.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4988 set thread context of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 2356 set thread context of 3668	2356	skyrpe.exe	95
PID 2356 set thread context of 1504	2356	skyrpe.exe	96

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\PROGRA~3\LOCALS~1\Temp\msvdlk.exe	svchost.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1504	skyrpe.exe
1504	skyrpe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1504	skyrpe.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe
Token: SeDebugPrivilege	3668	skyrpe.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
2356	skyrpe.exe
3668	skyrpe.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4988 wrote to memory of 4964	4988	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	89
PID 4964 wrote to memory of 3344	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	90
PID 4964 wrote to memory of 3344	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	90
PID 4964 wrote to memory of 3344	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	90
PID 3344 wrote to memory of 1904	3344	cmd.exe	93
PID 3344 wrote to memory of 1904	3344	cmd.exe	93
PID 3344 wrote to memory of 1904	3344	cmd.exe	93
PID 4964 wrote to memory of 2356	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	94
PID 4964 wrote to memory of 2356	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	94
PID 4964 wrote to memory of 2356	4964	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	94
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 3668	2356	skyrpe.exe	95
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 2356 wrote to memory of 1504	2356	skyrpe.exe	96
PID 1504 wrote to memory of 1816	1504	skyrpe.exe	97
PID 1504 wrote to memory of 1816	1504	skyrpe.exe	97
PID 1504 wrote to memory of 1816	1504	skyrpe.exe	97

C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
"C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
  "C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4964
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\IXYWE.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3344
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Skype" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe" /f
      4⤵
      Adds Run key to start application
      PID:1904
- - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
    "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2356
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:3668
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      Maps connected drives based on registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1504
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\syswow64\svchost.exe
        5⤵
        Adds policy Run key to start application
        Drops file in Program Files directory
        
        PID:1816

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\IXYWE.bat

Filesize
139B

MD5
0654f004b2e314bad7f75867e91da37d

SHA1
4232c22e7340b12108d86e3cb35ed288a3dbc7f1

SHA256
ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

SHA512
dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

Download Submit
C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe

Filesize
284KB

MD5
4f287bf4d5182a58e23ca89cbf102083

SHA1
46d77121869c2a69834e31528b2f08e234d751a2

SHA256
b9012cd30a3f4e50d7bd701284f29312f9786ed182ae5c1277f2702a38483fa8

SHA512
63387718a647055aa076a6e22384c4529409d27d0c2185f75749265bcf165d138a7c9e3fde436cde8b467b1dfea6849b8e1436df88db8a0c2c07f5c95c2f066d

Download Submit
C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe

Filesize
284KB

MD5
4f287bf4d5182a58e23ca89cbf102083

SHA1
46d77121869c2a69834e31528b2f08e234d751a2

SHA256
b9012cd30a3f4e50d7bd701284f29312f9786ed182ae5c1277f2702a38483fa8

SHA512
63387718a647055aa076a6e22384c4529409d27d0c2185f75749265bcf165d138a7c9e3fde436cde8b467b1dfea6849b8e1436df88db8a0c2c07f5c95c2f066d

Download Submit
C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe

Filesize
284KB

MD5
4f287bf4d5182a58e23ca89cbf102083

SHA1
46d77121869c2a69834e31528b2f08e234d751a2

SHA256
b9012cd30a3f4e50d7bd701284f29312f9786ed182ae5c1277f2702a38483fa8

SHA512
63387718a647055aa076a6e22384c4529409d27d0c2185f75749265bcf165d138a7c9e3fde436cde8b467b1dfea6849b8e1436df88db8a0c2c07f5c95c2f066d

Download Submit
C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe

Filesize
284KB

MD5
4f287bf4d5182a58e23ca89cbf102083

SHA1
46d77121869c2a69834e31528b2f08e234d751a2

SHA256
b9012cd30a3f4e50d7bd701284f29312f9786ed182ae5c1277f2702a38483fa8

SHA512
63387718a647055aa076a6e22384c4529409d27d0c2185f75749265bcf165d138a7c9e3fde436cde8b467b1dfea6849b8e1436df88db8a0c2c07f5c95c2f066d

Download Submit
memory/1504-164-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1504-156-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1816-169-0x00000000000A0000-0x00000000000A5000-memory.dmp

Filesize
20KB

Download
memory/1816-167-0x0000000000180000-0x0000000000185000-memory.dmp

Filesize
20KB

Download
memory/1816-166-0x00000000000A0000-0x00000000000A5000-memory.dmp

Filesize
20KB

Download
memory/3668-168-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3668-163-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-138-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-165-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-135-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-137-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-150-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4964-141-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download