a661b5a73ce07f4a0383d639de64c455b99fab270032f52802c952888fc0090c

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10-06-2024 13:17

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General

Target

VirusShare_bfb314e32e4f6063de39d9aa34ccd540.dll
Size

120KB
MD5

bfb314e32e4f6063de39d9aa34ccd540
SHA1

8be68d7368d01e72e0c22138c2b6b34fb8fe1835
SHA256

a661b5a73ce07f4a0383d639de64c455b99fab270032f52802c952888fc0090c
SHA512

3a195991815e298cf2b73d1ba9b93c923a7acd3c4d2ed2decc538aae3e2043a71081ed8a6d30f02204d5fa2507683083a83308cbd57e8680611dbf5265293dd4
SSDEEP

1536:YJ0Mk2f8gVEqxBWJ2yzJQFr8mGe99ZTYjfNSukVRxOWDHWRcd:YyMk2LVEsWJ2CeqmG6JmNSukrCRcd

Score

7^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 6 IoCs

pid	Process
3928	rundll32.exe
2712	rundll32.exe
2252	rundll32.exe
1040	rundll32.exe
4908	rundll32.exe
2416	rundll32.exe

Loads dropped DLL 8 IoCs

pid	Process
4156	rundll32.exe
4156	rundll32.exe
3928	rundll32.exe
2712	rundll32.exe
2252	rundll32.exe
1040	rundll32.exe
4908	rundll32.exe
2416	rundll32.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4156-2-0x000000007AB00000-0x000000007AB2B000-memory.dmp	upx
behavioral2/memory/4156-9-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/4156-18-0x0000000008C50000-0x0000000008C83000-memory.dmp	upx
behavioral2/memory/3928-19-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/3928-37-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/2712-38-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/2252-39-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/1040-40-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/4908-41-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/2416-42-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/1040-48-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/4156-52-0x000000007AB00000-0x000000007AB2B000-memory.dmp	upx
behavioral2/memory/2416-50-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/4908-49-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/4908-66-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/2416-77-0x000000007AB00000-0x000000007AB33000-memory.dmp	upx
behavioral2/memory/2416-92-0x000000007AB00000-0x000000007AB33000-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-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ctfmon.exe = "C:\\PROGRA~3\\rundll32.exe C:\\PROGRA~3\\r436z.dat,FG00"	rundll32.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\PROGRA~3\rundll32.exe	rundll32.exe
File created	C:\PROGRA~3\r436z.dat	rundll32.exe
File opened for modification	C:\PROGRA~3\z634r.pad	rundll32.exe
File opened for modification	C:\PROGRA~3\z634r.pad	rundll32.exe
File created	C:\PROGRA~3\z634r.bat	rundll32.exe
File created	C:\PROGRA~3\z634r.pad	rundll32.exe
File created	C:\PROGRA~3\as98213.txt	rundll32.exe
File created	C:\PROGRA~3\z634r.js	rundll32.exe
File created	C:\PROGRA~3\z634r.reg	rundll32.exe

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

System Information Discovery
T1082

Modifies Internet Explorer Protected Mode 1 TTPs 5 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\2500 = "3"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4\2500 = "3"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0\2500 = "3"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\2500 = "3"	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2\2500 = "3"	rundll32.exe

Modifies Internet Explorer Protected Mode Banner 1 TTPs 1 IoCs

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\NoProtectedModeBanner = "1"	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 16 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "424187345"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Software\Microsoft\Internet Explorer\Main	rundll32.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{D3EA4800-272B-11EF-BCA5-4A7C5F4B2F01} = "0"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Internet Explorer\GPU\AdapterInfo = "vendorId=\"0x10de\",deviceID=\"0x8c\",subSysID=\"0x0\",revision=\"0x0\",version=\"10.0.19041.546\"hypervisor=\"No Hypervisor (No SLAT)\""	IEXPLORE.EXE

Suspicious use of FindShellTrayWindow 8 IoCs

pid	Process
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe
376	iexplore.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
376	iexplore.exe
376	iexplore.exe
4636	IEXPLORE.EXE
4636	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 4156	372	rundll32.exe	82
PID 372 wrote to memory of 4156	372	rundll32.exe	82
PID 372 wrote to memory of 4156	372	rundll32.exe	82
PID 4156 wrote to memory of 3928	4156	rundll32.exe	86
PID 4156 wrote to memory of 3928	4156	rundll32.exe	86
PID 4156 wrote to memory of 3928	4156	rundll32.exe	86
PID 3928 wrote to memory of 2712	3928	rundll32.exe	87
PID 3928 wrote to memory of 2712	3928	rundll32.exe	87
PID 3928 wrote to memory of 2712	3928	rundll32.exe	87
PID 3928 wrote to memory of 2252	3928	rundll32.exe	88
PID 3928 wrote to memory of 2252	3928	rundll32.exe	88
PID 3928 wrote to memory of 2252	3928	rundll32.exe	88
PID 3928 wrote to memory of 1040	3928	rundll32.exe	89
PID 3928 wrote to memory of 1040	3928	rundll32.exe	89
PID 3928 wrote to memory of 1040	3928	rundll32.exe	89
PID 3928 wrote to memory of 4908	3928	rundll32.exe	90
PID 3928 wrote to memory of 4908	3928	rundll32.exe	90
PID 3928 wrote to memory of 4908	3928	rundll32.exe	90
PID 3928 wrote to memory of 2416	3928	rundll32.exe	91
PID 3928 wrote to memory of 2416	3928	rundll32.exe	91
PID 3928 wrote to memory of 2416	3928	rundll32.exe	91
PID 1040 wrote to memory of 376	1040	rundll32.exe	94
PID 1040 wrote to memory of 376	1040	rundll32.exe	94
PID 376 wrote to memory of 4636	376	iexplore.exe	95
PID 376 wrote to memory of 4636	376	iexplore.exe	95
PID 376 wrote to memory of 4636	376	iexplore.exe	95
PID 1040 wrote to memory of 376	1040	rundll32.exe	94
PID 1040 wrote to memory of 376	1040	rundll32.exe	94

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\VirusShare_bfb314e32e4f6063de39d9aa34ccd540.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\VirusShare_bfb314e32e4f6063de39d9aa34ccd540.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4156
- - C:\PROGRA~3\rundll32.exe
    C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG00
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - Suspicious use of WriteProcessMemory
    PID:3928
  - - C:\PROGRA~3\rundll32.exe
      C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG01
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:2712
  - - C:\PROGRA~3\rundll32.exe
      C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG02
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      PID:2252
  - - C:\PROGRA~3\rundll32.exe
      C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG03
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Modifies Internet Explorer Protected Mode
      Modifies Internet Explorer Protected Mode Banner
      Modifies Internet Explorer settings
      Suspicious use of WriteProcessMemory
      PID:1040
    - - C:\Program Files\Internet Explorer\iexplore.exe
        
        "C:\Program Files\Internet Explorer\iexplore.exe"
        5⤵
        Modifies Internet Explorer settings
        Suspicious use of FindShellTrayWindow
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:376
      - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:376 CREDAT:17410 /prefetch:2
        6⤵
        Modifies Internet Explorer settings
        Suspicious use of SetWindowsHookEx
        
        PID:4636
  - - C:\PROGRA~3\rundll32.exe
      C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG04
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:4908
  - - C:\PROGRA~3\rundll32.exe
      C:\PROGRA~3\rundll32.exe C:\PROGRA~3\r436z.dat,FG06
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:2416

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\r436z.dat

Filesize
120KB

MD5
bfb314e32e4f6063de39d9aa34ccd540

SHA1
8be68d7368d01e72e0c22138c2b6b34fb8fe1835

SHA256
a661b5a73ce07f4a0383d639de64c455b99fab270032f52802c952888fc0090c

SHA512
3a195991815e298cf2b73d1ba9b93c923a7acd3c4d2ed2decc538aae3e2043a71081ed8a6d30f02204d5fa2507683083a83308cbd57e8680611dbf5265293dd4

Download Submit
C:\ProgramData\rundll32.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
memory/1040-40-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/1040-48-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2252-39-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2416-42-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2416-92-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2416-77-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2416-50-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/2712-38-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/3928-19-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/3928-37-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/4156-18-0x0000000008C50000-0x0000000008C83000-memory.dmp

Filesize
204KB

Download
memory/4156-52-0x000000007AB00000-0x000000007AB2B000-memory.dmp

Filesize
172KB

Download
memory/4156-51-0x0000000008AD0000-0x0000000008AD1000-memory.dmp

Filesize
4KB

Download
memory/4156-2-0x000000007AB00000-0x000000007AB2B000-memory.dmp

Filesize
172KB

Download
memory/4156-9-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/4156-1-0x0000000008AD0000-0x0000000008AD1000-memory.dmp

Filesize
4KB

Download
memory/4908-41-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/4908-49-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download
memory/4908-66-0x000000007AB00000-0x000000007AB33000-memory.dmp

Filesize
204KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads