536e9d0bcfcc8c949c3e6a6b85725603878e917bf783a2ce9ccc5e231fbba33b

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
03/09/2024, 00:25

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General

Target

0817a7d1a7d34d79e6445bbc319df3d0N.exe
Size

284KB
MD5

0817a7d1a7d34d79e6445bbc319df3d0
SHA1

62d3084442cd86e3e6ce9e4ebecf1489cf757025
SHA256

536e9d0bcfcc8c949c3e6a6b85725603878e917bf783a2ce9ccc5e231fbba33b
SHA512

bcd712b60dda33ec09f87af33da5e36197d37a0f8893a2f395d1545c7f945ad4a86ba6f601ae253afb17383cbfcd01419642f6a7e4ed06037079d4f73f9a3b7e
SSDEEP

3072:mSQ0EWVwZhKxC5Rt+k60Zh+qw6PYSsszfHZTZJ2lC/:mPA6wxmuJspr2lo

Score

8^/10

discovery persistence upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

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\16613 = "C:\\PROGRA~3\\LOCALS~1\\Temp\\msvvyxwur.pif"	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
41784	skyrpe.exe
126564	skyrpe.exe
126504	skyrpe.exe

Loads dropped DLL 5 IoCs

pid	Process
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/41032-53488-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-53487-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-53486-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-53483-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-53481-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-53683-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/41032-106972-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\disk\enum	skyrpe.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	skyrpe.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2060 set thread context of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 41784 set thread context of 126564	41784	skyrpe.exe	36
PID 41784 set thread context of 126504	41784	skyrpe.exe	37

Drops file in Program Files directory 1 IoCs

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

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	skyrpe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0817a7d1a7d34d79e6445bbc319df3d0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0817a7d1a7d34d79e6445bbc319df3d0N.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe
126504	skyrpe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
126504	skyrpe.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	126564	skyrpe.exe
Token: SeDebugPrivilege	126564	skyrpe.exe
Token: SeDebugPrivilege	126564	skyrpe.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe
41784	skyrpe.exe
126564	skyrpe.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 2060 wrote to memory of 41032	2060	0817a7d1a7d34d79e6445bbc319df3d0N.exe	31
PID 41032 wrote to memory of 41052	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	32
PID 41032 wrote to memory of 41052	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	32
PID 41032 wrote to memory of 41052	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	32
PID 41032 wrote to memory of 41052	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	32
PID 41052 wrote to memory of 2060	41052	cmd.exe	34
PID 41052 wrote to memory of 2060	41052	cmd.exe	34
PID 41052 wrote to memory of 2060	41052	cmd.exe	34
PID 41052 wrote to memory of 2060	41052	cmd.exe	34
PID 41032 wrote to memory of 41784	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	35
PID 41032 wrote to memory of 41784	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	35
PID 41032 wrote to memory of 41784	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	35
PID 41032 wrote to memory of 41784	41032	0817a7d1a7d34d79e6445bbc319df3d0N.exe	35
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126564	41784	skyrpe.exe	36
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 41784 wrote to memory of 126504	41784	skyrpe.exe	37
PID 126504 wrote to memory of 126460	126504	skyrpe.exe	38
PID 126504 wrote to memory of 126460	126504	skyrpe.exe	38
PID 126504 wrote to memory of 126460	126504	skyrpe.exe	38
PID 126504 wrote to memory of 126460	126504	skyrpe.exe	38

C:\Users\Admin\AppData\Local\Temp\0817a7d1a7d34d79e6445bbc319df3d0N.exe
"C:\Users\Admin\AppData\Local\Temp\0817a7d1a7d34d79e6445bbc319df3d0N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2060
- C:\Users\Admin\AppData\Local\Temp\0817a7d1a7d34d79e6445bbc319df3d0N.exe
  "C:\Users\Admin\AppData\Local\Temp\0817a7d1a7d34d79e6445bbc319df3d0N.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:41032
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\CHVUH.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:41052
  - - 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
      System Location Discovery: System Language Discovery
      PID:2060
- - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
    "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:41784
  - - C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe
      "C:\Users\Admin\AppData\Roaming\skype\skyrpe.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:126564
  - - 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
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:126504
    - - C:\Windows\syswow64\svchost.exe
        
        C:\Windows\syswow64\svchost.exe
        5⤵
        Adds policy Run key to start application
        Drops file in Program Files directory
        System Location Discovery: System Language Discovery
        
        PID:126460

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

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

Filesize
139B

MD5
0654f004b2e314bad7f75867e91da37d

SHA1
4232c22e7340b12108d86e3cb35ed288a3dbc7f1

SHA256
ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

SHA512
dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

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

Filesize
284KB

MD5
53f5c0eb2b45ff988e9f79895b7f6e87

SHA1
aaa404d145f6a8c77c98efa4b707bf4e550755fd

SHA256
4718a4f400e9ca0b68ca22827f611592edc5b5301b71d267dddd19c235ba4f8c

SHA512
0ef4511915eb6f98de01227a7bf6762b5013c35e6f9811ffedff501878f10efe29ad25d27be06e9ec1f402ab4e12d8681bf8690124ac62b4712f646c2feac30d

Download Submit
memory/2060-11114-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11130-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11107-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11134-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11125-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11106-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11108-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11110-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11111-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11112-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11135-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11133-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11132-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11131-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11124-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11129-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11128-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11127-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11115-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11126-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11118-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11122-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11121-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11120-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11119-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11123-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11117-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-11116-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/2060-2-0x00000000003B0000-0x00000000003B1000-memory.dmp

Filesize
4KB

Download
memory/2060-11113-0x0000000000090000-0x0000000000190000-memory.dmp

Filesize
1024KB

Download
memory/41032-53479-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53481-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53483-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53485-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/41032-53486-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53487-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53488-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-53683-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/41032-106972-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/126504-106968-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download