93a070992e937aa9cc17da55c1c20b40924eb2385c83ecc746960cbf89ee270a

General

Target

20bf7a3ac4969f87c387f59cb34b3750N.dll
Size

1.8MB
MD5

20bf7a3ac4969f87c387f59cb34b3750
SHA1

a8534bf47c2133effa3e9b25ce6334a1e8bc2ad9
SHA256

93a070992e937aa9cc17da55c1c20b40924eb2385c83ecc746960cbf89ee270a
SHA512

bb69a838a58704881c3cc792674fce2a968c9fc4174f4bfd2e2aa1339fe53f375e6aec63d386a1e2bcf8073d6693636d506cc22fadeb726b3fe09bcffa37b87d
SSDEEP

24576:OhGGliI5h/kWpflTr3nllyex2Hn0DoY/EX7z3XDMWTLlY+c7afN4NAQ8vf1:AbvppflTbvyex2UDoaE3TpTpY+xc8vf

Score

7^/10

adware discovery stealer upx

Malware Config

Signatures

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	regsvr32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	regsvr32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1880-0-0x0000000000400000-0x000000000071C000-memory.dmp	upx
behavioral2/memory/1880-8-0x0000000000400000-0x000000000071C000-memory.dmp	upx

Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\NoExplorer = "1"	regsvr32.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	regsvr32.exe

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ENABLE_SCRIPT_PASTE_URLACTION_IF_PROMPT	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ENABLE_SCRIPT_PASTE_URLACTION_IF_PROMPT\iexplore.exe = "1"	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8F577DD6-A889-B773-13C5-1FBA13C51FBA}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8F577DD6-A889-B773-13C5-1FBA13C51FBA}\ = "WebCheckWebCrawler"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8F577DD6-A889-B773-13C5-1FBA13C51FBA}\InProcServer32\ = "C:\\Windows\\SysWOW64\\webcheck.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\20bf7a3ac4969f87c387f59cb34b3750N.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CF39202E-BE00-4DB0-9E87-9D38AF793FCD}\ = "Ssystem Object"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8F577DD6-A889-B773-13C5-1FBA13C51FBA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8F577DD6-A889-B773-13C5-1FBA13C51FBA}\InProcServer32	regsvr32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	1880	regsvr32.exe
Token: SeIncBasePriorityPrivilege	1880	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 1880	4876	regsvr32.exe	84
PID 4876 wrote to memory of 1880	4876	regsvr32.exe	84
PID 4876 wrote to memory of 1880	4876	regsvr32.exe	84

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\20bf7a3ac4969f87c387f59cb34b3750N.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\20bf7a3ac4969f87c387f59cb34b3750N.dll
  2⤵
  - Checks BIOS information in registry
  - Installs/modifies Browser Helper Object
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  PID:1880

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

1

T1176

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1880-0-0x0000000000400000-0x000000000071C000-memory.dmp

Filesize
3.1MB

Download
memory/1880-1-0x0000000002B60000-0x0000000002CA2000-memory.dmp

Filesize
1.3MB

Download
memory/1880-7-0x0000000002B60000-0x0000000002CA2000-memory.dmp

Filesize
1.3MB

Download
memory/1880-8-0x0000000000400000-0x000000000071C000-memory.dmp

Filesize
3.1MB

Download
memory/1880-9-0x0000000002B60000-0x0000000002CA2000-memory.dmp

Filesize
1.3MB

Download
memory/1880-10-0x00000000004C4000-0x000000000052A000-memory.dmp

Filesize
408KB

Download
memory/1880-11-0x0000000002B60000-0x0000000002CA2000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads