4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-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\1072 = "C:\\PROGRA~3\\LOCALS~1\\Temp\\mseqcakua.cmd"	svchost.exe

Executes dropped EXE 3 IoCs

pid	Process
1164	skyrpe.exe
1652	skyrpe.exe
1324	skyrpe.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1232-57-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-63-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-64-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-67-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-81-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1232-101-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1652-102-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/1652-108-0x0000000000400000-0x000000000040B000-memory.dmp	upx

Loads dropped DLL 5 IoCs

pid	Process
1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1232	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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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 1376 set thread context of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1164 set thread context of 1652	1164	skyrpe.exe	31
PID 1164 set thread context of 1324	1164	skyrpe.exe	32

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File created	C:\PROGRA~3\LOCALS~1\Temp\mseqcakua.cmd	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 1 IoCs

pid	Process
1324	skyrpe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1324	skyrpe.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe
Token: SeDebugPrivilege	1652	skyrpe.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
1164	skyrpe.exe
1652	skyrpe.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1376 wrote to memory of 1232	1376	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	26
PID 1232 wrote to memory of 1220	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	27
PID 1232 wrote to memory of 1220	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	27
PID 1232 wrote to memory of 1220	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	27
PID 1232 wrote to memory of 1220	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	27
PID 1220 wrote to memory of 1728	1220	cmd.exe	29
PID 1220 wrote to memory of 1728	1220	cmd.exe	29
PID 1220 wrote to memory of 1728	1220	cmd.exe	29
PID 1220 wrote to memory of 1728	1220	cmd.exe	29
PID 1232 wrote to memory of 1164	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	30
PID 1232 wrote to memory of 1164	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	30
PID 1232 wrote to memory of 1164	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	30
PID 1232 wrote to memory of 1164	1232	4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe	30
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1652	1164	skyrpe.exe	31
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1164 wrote to memory of 1324	1164	skyrpe.exe	32
PID 1324 wrote to memory of 976	1324	skyrpe.exe	33
PID 1324 wrote to memory of 976	1324	skyrpe.exe	33
PID 1324 wrote to memory of 976	1324	skyrpe.exe	33
PID 1324 wrote to memory of 976	1324	skyrpe.exe	33

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:1376
- C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe
  "C:\Users\Admin\AppData\Local\Temp\4c6384b33c02a8124545a6356d71c1d12e45d369e796d669da75238051c37c71.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\KYFOX.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1220
  - - 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:1728
- - 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:1164
  - - 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:1652
  - - 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:1324
    - - 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:976

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\KYFOX.bat

Filesize
139B

MD5
0654f004b2e314bad7f75867e91da37d

SHA1
4232c22e7340b12108d86e3cb35ed288a3dbc7f1

SHA256
ead325a060300a9606a3f0f14694be39a3e4006a60c6c3eb0bea5d6f98192249

SHA512
dda135cdfca90a742d42b4c7a5e7f5df6580ec428302a8f0c311f5b92eb08dda75774e0c7497110faffbe2dfa02b30d2dfe35ec2848a275f53be8d930c7aa553

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

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

Filesize
284KB

MD5
03e6d735f2a6103729bc573cc92ba019

SHA1
efc1c0b11c36a50c5b304a89b0c8e2fd2177bb1f

SHA256
24e847b55c9653aa47089509c4d97901fa81c4f50f85f370e5ca940d757250a0

SHA512
0e0b6fa747e65abb09409abb99e195930519cae703fb13701c59d2cf2da8b0bfd6caa7b15d7507ced7f22012efe96924b66bc05653abb29dde2074e5f2c35938

Download Submit
memory/976-109-0x0000000000020000-0x0000000000025000-memory.dmp

Filesize
20KB

Download
memory/976-107-0x0000000000020000-0x0000000000025000-memory.dmp

Filesize
20KB

Download
memory/976-106-0x0000000000080000-0x0000000000085000-memory.dmp

Filesize
20KB

Download
memory/1232-81-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-56-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-63-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-64-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-68-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1232-57-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-67-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1232-101-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1324-92-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1324-94-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1324-103-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1324-91-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/1652-102-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

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memory/1652-108-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

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