cff2688925162938aece0c55ffa49b346d8bd5cab177c8d4250befbd098d0536

Analysis

max time kernel
145s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26-12-2023 04:14

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General

Target

533a7dbf86c09faa41582c2667704d6a.exe
Size

60KB
MD5

533a7dbf86c09faa41582c2667704d6a
SHA1

8d02c26bd9964f61659d7e7bbd10b9a18f6f9bdb
SHA256

cff2688925162938aece0c55ffa49b346d8bd5cab177c8d4250befbd098d0536
SHA512

ed94fce2c35d33e7cb19903f990dc0c2573b8880ab1ae14574869a0df28e3658f1f95f538c41202ce77bcefc7986ed0300b6cb40219ffac92d3e19de46eddf4d
SSDEEP

1536:adrC+sr5GfbQ26SvrFrlLXtwrUidKbRt:yfbQUrFpLgdKlt

Score

8^/10

persistence

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 4 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	533a7dbf86c09faa41582c2667704d6a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\CmSTP = "C:\\Users\\Admin\\AppData\\Roaming\\MICROS~1\\cmstp.exe /waitservice"	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	533a7dbf86c09faa41582c2667704d6a.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\MstInit = "C:\\Users\\Admin\\LOCALS~1\\APPLIC~1\\MICROS~1\\mstinit.exe /waitservice"	533a7dbf86c09faa41582c2667704d6a.exe

Drops file in Drivers directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\drivers\mstinit.exe	533a7dbf86c09faa41582c2667704d6a.exe
File created	C:\Windows\SysWOW64\drivers\comrepl.exe	ieudinit.exe
File opened for modification	C:\Windows\SysWOW64\drivers\comrepl.exe	ieudinit.exe

Executes dropped EXE 1 IoCs

pid	Process
2292	ieudinit.exe

Loads dropped DLL 2 IoCs

pid	Process
2264	533a7dbf86c09faa41582c2667704d6a.exe
2264	533a7dbf86c09faa41582c2667704d6a.exe

Modifies data under HKEY_USERS 10 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\Software	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows	533a7dbf86c09faa41582c2667704d6a.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies	533a7dbf86c09faa41582c2667704d6a.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\MstInit = "C:\\Windows\\System32\\drivers\\mstinit.exe /waitservice"	533a7dbf86c09faa41582c2667704d6a.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 2292	2264	533a7dbf86c09faa41582c2667704d6a.exe	28
PID 2264 wrote to memory of 2292	2264	533a7dbf86c09faa41582c2667704d6a.exe	28
PID 2264 wrote to memory of 2292	2264	533a7dbf86c09faa41582c2667704d6a.exe	28
PID 2264 wrote to memory of 2292	2264	533a7dbf86c09faa41582c2667704d6a.exe	28

C:\Users\Admin\AppData\Local\Temp\533a7dbf86c09faa41582c2667704d6a.exe
"C:\Users\Admin\AppData\Local\Temp\533a7dbf86c09faa41582c2667704d6a.exe"
1⤵
- Adds policy Run key to start application
- Drops file in Drivers directory
- Loads dropped DLL
- Modifies data under HKEY_USERS
- Suspicious use of WriteProcessMemory
PID:2264
- C:\Users\Admin\AppData\Roaming\ieudinit.exe
  C:\Users\Admin\AppData\Roaming\ieudinit.exe /waitservice
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  PID:2292

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\MICROS~1\cmstp.exe

Filesize
60KB

MD5
533a7dbf86c09faa41582c2667704d6a

SHA1
8d02c26bd9964f61659d7e7bbd10b9a18f6f9bdb

SHA256
cff2688925162938aece0c55ffa49b346d8bd5cab177c8d4250befbd098d0536

SHA512
ed94fce2c35d33e7cb19903f990dc0c2573b8880ab1ae14574869a0df28e3658f1f95f538c41202ce77bcefc7986ed0300b6cb40219ffac92d3e19de46eddf4d

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads