2efb6e749e4106fcd1c7b2a03205e34b2e2a4ebb7a2022eb01f185b3ff0b1244

Analysis

max time kernel
145s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30/12/2023, 20:41

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General

Target

1c08339293cf52666c8b32d8a196f7ab.dll
Size

235KB
MD5

1c08339293cf52666c8b32d8a196f7ab
SHA1

cd488228cf269f6673d740866cfee85e855f9e21
SHA256

2efb6e749e4106fcd1c7b2a03205e34b2e2a4ebb7a2022eb01f185b3ff0b1244
SHA512

8ae404a86dd1b923e92ed264f10b4a7476432f65b4c7b6dfa2a281c55c8316c01283e07ad8be7114222174218e6fcbac7a40c233846c60d632b531bac6fb433a
SSDEEP

3072:KT/PM6+iJSu4HpEfWF0sYNPgDPutatPr7LRQtTmgw+kDJeR032NHYYBcMIwt45Zy:8H+iJSb2qLosD532NH2MIw+nQvt6a2

Score

8^/10

persistence upx

Malware Config

Signatures

Sets DLL path for service in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tmsscvl\Parameters\ServiceDll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1c08339293cf52666c8b32d8a196f7ab.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tmsscvl\Parameters\ServiceDll = "c:\\users\\admin\\appdata\\local\\temp\\1c08339293cf52666c8b32d8a196f7ab.dll"	svchost.exe

Sets service image path in registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tmsscvl\ImagePath = "%SystemRoot%\\System32\\svchost.exe -k tmsscvl"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tmsscvl\ImagePath = "%SystemRoot%\\System32\\svchost.exe -k tmsscvl"	svchost.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1068-0-0x0000000000400000-0x00000000004A9000-memory.dmp	upx
behavioral2/memory/4420-2-0x0000000000400000-0x00000000004A9000-memory.dmp	upx

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	svchost.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	svchost.exe

Modifies data under HKEY_USERS 8 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	svchost.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	svchost.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	svchost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 1068	4808	regsvr32.exe	88
PID 4808 wrote to memory of 1068	4808	regsvr32.exe	88
PID 4808 wrote to memory of 1068	4808	regsvr32.exe	88

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\1c08339293cf52666c8b32d8a196f7ab.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\1c08339293cf52666c8b32d8a196f7ab.dll
  2⤵
  - Sets DLL path for service in the registry
  - Sets service image path in registry
  PID:1068

C:\Windows\SysWOW64\svchost.exe
C:\Windows\SysWOW64\svchost.exe -k tmsscvl -s tmsscvl
1⤵
- Sets DLL path for service in the registry
- Sets service image path in registry
- Drops file in System32 directory
- Modifies data under HKEY_USERS
PID:4420

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

memory/1068-0-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download
memory/1068-1-0x00000000012E0000-0x00000000012E1000-memory.dmp

Filesize
4KB

Download
memory/4420-2-0x0000000000400000-0x00000000004A9000-memory.dmp

Filesize
676KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads