42a589f35ce139a85ccb74e60f8cadfd67d22cafa650ced3383fced97016478d

Analysis

max time kernel
146s
max time network
73s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/12/2023, 21:54

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General

Target

fad992261c9fc6964804a087b8ad2ce8.exe
Size

16KB
MD5

fad992261c9fc6964804a087b8ad2ce8
SHA1

250b57c1828b172dbafd15c97b8b8036441c6d63
SHA256

42a589f35ce139a85ccb74e60f8cadfd67d22cafa650ced3383fced97016478d
SHA512

7a1bcbfe8779a05fb8c13b351e656bac5fbd4731a5385404c4b8b97ab22f12727841f9a093854e33f31bb6d329c545c63a476188f21832a7d6000e7dd2c24c26
SSDEEP

384:qXfbEDC1603M9ONHYE/JHfeoUpCt82jxldpUxibv:qXfbEeYUN42/eBM1FUxib

Score

10^/10

persistence upx

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\C:\Windows\fonts\zjhgpyzu.nls = "{12757779-277E-4C3D-898D-2602BC5A3993}"	fad992261c9fc6964804a087b8ad2ce8.exe

Loads dropped DLL 2 IoCs

pid	Process
4876	fad992261c9fc6964804a087b8ad2ce8.exe
3732	regsvr32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4876-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4876-9-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\fonts\zjhgpyzu.tmp	fad992261c9fc6964804a087b8ad2ce8.exe
File opened for modification	C:\Windows\fonts\gbjxsj01.nls	fad992261c9fc6964804a087b8ad2ce8.exe

Modifies registry class 46 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ = "Igbjxatl"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ = "Igbjxatl"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\HELPDIR\ = "C:\\Windows\\fonts"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl\ = "gbjxatl Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\TypeLib\ = "{B02EB679-06C3-4F82-B0DD-F55DCB76B582}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib\ = "{B02EB679-06C3-4F82-B0DD-F55DCB76B582}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl\CurVer\ = "JXSJ.gbjxatl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\ = "JXSJ 1.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl.1\CLSID\ = "{12757779-277E-4C3D-898D-2602BC5A3993}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\ = "gbjxatl Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\0\win32\ = "C:\\Windows\\fonts\\zjhgpyzu.nls"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl\CLSID\ = "{12757779-277E-4C3D-898D-2602BC5A3993}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\ProgID\ = "JXSJ.gbjxatl.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{B02EB679-06C3-4F82-B0DD-F55DCB76B582}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\TypeLib\ = "{B02EB679-06C3-4F82-B0DD-F55DCB76B582}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\VersionIndependentProgID\ = "JXSJ.gbjxatl"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\InprocServer32\ = "C:\\Windows\\fonts\\zjhgpyzu.nls"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\JXSJ.gbjxatl.1\ = "gbjxatl Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{12757779-277E-4C3D-898D-2602BC5A3993}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{AA9381CD-8285-433D-9812-C0332F6D5C86}\ProxyStubClsid32	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4876	fad992261c9fc6964804a087b8ad2ce8.exe
4876	fad992261c9fc6964804a087b8ad2ce8.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	4876	fad992261c9fc6964804a087b8ad2ce8.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4876	fad992261c9fc6964804a087b8ad2ce8.exe
4876	fad992261c9fc6964804a087b8ad2ce8.exe
4876	fad992261c9fc6964804a087b8ad2ce8.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4876 wrote to memory of 3732	4876	fad992261c9fc6964804a087b8ad2ce8.exe	27
PID 4876 wrote to memory of 3732	4876	fad992261c9fc6964804a087b8ad2ce8.exe	27
PID 4876 wrote to memory of 3732	4876	fad992261c9fc6964804a087b8ad2ce8.exe	27
PID 4876 wrote to memory of 1528	4876	fad992261c9fc6964804a087b8ad2ce8.exe	101
PID 4876 wrote to memory of 1528	4876	fad992261c9fc6964804a087b8ad2ce8.exe	101
PID 4876 wrote to memory of 1528	4876	fad992261c9fc6964804a087b8ad2ce8.exe	101

C:\Users\Admin\AppData\Local\Temp\fad992261c9fc6964804a087b8ad2ce8.exe
"C:\Users\Admin\AppData\Local\Temp\fad992261c9fc6964804a087b8ad2ce8.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4876
- C:\Windows\SysWOW64\regsvr32.exe
  regsvr32.exe /s "C:\Windows\fonts\zjhgpyzu.nls"
  2⤵
  - Loads dropped DLL
  - Modifies registry class
  PID:3732
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\FAD992~1.EXE > nul
  2⤵
  PID:1528

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

Replay Monitor

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Downloads

C:\Windows\Fonts\zjhgpyzu.nls

Filesize
48KB

MD5
6879d32cbf084d582199d6e7e3eb97cc

SHA1
8c7985ca2425139fa920936920830728423b76eb

SHA256
5ea833fad34b428db53f52614b38084c606502d5d059517ef77e2d1f9ab01e99

SHA512
1b5f6f8cf730a08100715b4eca33baea57bb8a1b41d8efc539ccb5177360905aa7776e2911e5b63c6fa7bb4518cd60d35c66861bc74185b0f826bce0685529e3

Download Submit
memory/3732-8-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4876-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4876-10-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4876-9-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4876-17-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download