e2eb111cb66d5c6ecaae532a841138e60eb25ae0392464634f14ebfd2c383cbd

Analysis

max time kernel
136s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 01:44

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General

Target

233824f841bf6a47547bf0d741fc458a.exe
Size

90KB
MD5

233824f841bf6a47547bf0d741fc458a
SHA1

fcbf05e0f648bd1a10e91890c3284dc653a00b13
SHA256

e2eb111cb66d5c6ecaae532a841138e60eb25ae0392464634f14ebfd2c383cbd
SHA512

074f52b361c1f6680a5a1330cc9cd191697ccdb4e30c1cffe233106eab1d108ae74afb910c347d0b91a0aa92b67b6132e9d4f3a343cd3e8138c125d1bb4f9074
SSDEEP

1536:OYl5SI4ZL+inPsQ5CZggsnbFdTILy/wSUOTIKWZg4TxSZJjx6YGroB8q:OYl5SI4ZLBaVgbnELyNIfZ2N6b0B8q

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = ",rundll32.exe C:\\Windows\\system32\\winsys16_070307.dll start"	233824f841bf6a47547bf0d741fc458a.exe

Drops file in System32 directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\AlxRes070307.exe	233824f841bf6a47547bf0d741fc458a.exe
File created	C:\Windows\SysWOW64\scrsys070307.scr	233824f841bf6a47547bf0d741fc458a.exe
File opened for modification	C:\Windows\SysWOW64\winsys32_070307.dll	233824f841bf6a47547bf0d741fc458a.exe
File created	C:\Windows\SysWOW64\scrsys16_070307.scr	233824f841bf6a47547bf0d741fc458a.exe
File opened for modification	C:\Windows\SysWOW64\scrsys16_070307.scr	233824f841bf6a47547bf0d741fc458a.exe
File created	C:\Windows\SysWOW64\AlxRes070307.exe	233824f841bf6a47547bf0d741fc458a.exe
File opened for modification	C:\Windows\SysWOW64\scrsys070307.scr	233824f841bf6a47547bf0d741fc458a.exe
File created	C:\Windows\SysWOW64\winsys32_070307.dll	233824f841bf6a47547bf0d741fc458a.exe
File created	C:\Windows\SysWOW64\winsys16_070307.dll	233824f841bf6a47547bf0d741fc458a.exe
File opened for modification	C:\Windows\SysWOW64\winsys16_070307.dll	233824f841bf6a47547bf0d741fc458a.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\mywinsys.ini	233824f841bf6a47547bf0d741fc458a.exe

Modifies Internet Explorer settings 1 TTPs 30 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31079656"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "410902305"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\VersionManager	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3521709805"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{F7EB599F-A8DB-11EE-B6AD-5A16FF4F52D9} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\GPU	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\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
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31079656"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "3344834187"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31079656"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "3344834187"	iexplore.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe
4752	233824f841bf6a47547bf0d741fc458a.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4752	233824f841bf6a47547bf0d741fc458a.exe
Token: SeDebugPrivilege	4752	233824f841bf6a47547bf0d741fc458a.exe
Token: SeDebugPrivilege	4752	233824f841bf6a47547bf0d741fc458a.exe
Token: SeDebugPrivilege	4752	233824f841bf6a47547bf0d741fc458a.exe
Token: SeDebugPrivilege	4752	233824f841bf6a47547bf0d741fc458a.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2452	iexplore.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
2452	iexplore.exe
2452	iexplore.exe
4904	IEXPLORE.EXE
4904	IEXPLORE.EXE
4904	IEXPLORE.EXE
4904	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4752 wrote to memory of 2452	4752	233824f841bf6a47547bf0d741fc458a.exe	94
PID 4752 wrote to memory of 2452	4752	233824f841bf6a47547bf0d741fc458a.exe	94
PID 2452 wrote to memory of 4904	2452	iexplore.exe	98
PID 2452 wrote to memory of 4904	2452	iexplore.exe	98
PID 2452 wrote to memory of 4904	2452	iexplore.exe	98
PID 4752 wrote to memory of 1636	4752	233824f841bf6a47547bf0d741fc458a.exe	99
PID 4752 wrote to memory of 1636	4752	233824f841bf6a47547bf0d741fc458a.exe	99
PID 4752 wrote to memory of 1636	4752	233824f841bf6a47547bf0d741fc458a.exe	99
PID 4752 wrote to memory of 3616	4752	233824f841bf6a47547bf0d741fc458a.exe	100
PID 4752 wrote to memory of 3616	4752	233824f841bf6a47547bf0d741fc458a.exe	100
PID 4752 wrote to memory of 3616	4752	233824f841bf6a47547bf0d741fc458a.exe	100

C:\Users\Admin\AppData\Local\Temp\233824f841bf6a47547bf0d741fc458a.exe
"C:\Users\Admin\AppData\Local\Temp\233824f841bf6a47547bf0d741fc458a.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4752
- C:\program files\internet explorer\iexplore.exe
  "C:\program files\internet explorer\iexplore.exe"
  2⤵
  - Modifies Internet Explorer settings
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2452
- - C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
    "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2452 CREDAT:17410 /prefetch:2
    3⤵
    - Modifies Internet Explorer settings
    - Suspicious use of SetWindowsHookEx
    PID:4904
- C:\program files\internet explorer\iexplore.exe
  "C:\program files\internet explorer\iexplore.exe"
  2⤵
  PID:1636
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c c:\myDelm.bat
  2⤵
  PID:3616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\L3T8W3B4\suggestions[1].en-US

Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit
C:\Windows\mywinsys.ini

Filesize
342B

MD5
97fb853e579564f30b844fd30d78cb3d

SHA1
39c2698d22051eeba167df8c1e50bce7e59a7ad7

SHA256
a0c9d22c5a9a3545c015ca78c04d516d8dff30c948bec282a5b724c216c8d0b3

SHA512
e21c070455afd1371f29ed3e5a0f988f2caee8ddb874538f8d5659d76261ee29da0d6d081de52a05d43922a037f9ee81b95a58da42850c5c26dd9b3434666457

Download Submit
\??\c:\myDelm.bat

Filesize
184B

MD5
18b9538b8feb8da10fd4464559e19c3c

SHA1
80adfe01c77be34254c605a7f49c0a09a87e4c52

SHA256
038bf62d7cbc8645aaab8fcaa6b42aa9af9d42a300e8f36a0cd29f3105808aa3

SHA512
df4bfa77dbd07b02b369cf6ed361cf83abf39dcc5909ca63a699d85e20d5bbf4ad49472b1212a0dcc0f9cc40a45059308d60e1e38a674d3ca324f6469e116b4d

Download Submit
memory/4752-0-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4752-1-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4752-2-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4752-36-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4752-37-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4752-42-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download