6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554

Analysis

max time kernel
142s
max time network
177s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/10/2022, 02:23

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General

Target

6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
Size

541KB
MD5

2e16b595c485a97b2532b1c48417f367
SHA1

090fddd8b2915936c934a9fd2407feac78d2962a
SHA256

6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554
SHA512

933356cd137bc4345eac1af4251affb823468ff3f2fdb250d7ce25170092af5ec44ab244cd19e4f94b5c11405bedb9c119d4237a6707cd9e090daa1820a05a34
SSDEEP

12288:EDaq927uCSbyjNfh4NC/E5l2F+7p64ozoCeaUUo2VWh:EDz2yyjT4N+R+7IjeaUUo28h

Score

8^/10

bootkit persistence upx

Malware Config

Signatures

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1188-132-0x0000000000400000-0x00000000004E7000-memory.dmp	upx
behavioral2/memory/1188-142-0x0000000000400000-0x00000000004E7000-memory.dmp	upx
behavioral2/files/0x000400000001da55-145.dat	upx

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1067

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\TaoBao\ÌÔ±¦.ico	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
File created	C:\Program Files (x86)\Common Files\TaoBao\Ð¡ÓÎÏ·.ico	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\RtkSYUdp.exe	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\internet explorer\version Vector	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

Modifies registry class 46 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\ShellFolder\Attributes = "0"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\PersistentHandler\ = "{5e941d80-bf96-11cd-b579-08002b30bfeb}"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{000214F9-0000-0000-C000-000000000046}\ = "{FBF23B40-E3F0-101B-8488-00AA003E56F8}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{000214F9-0000-0000-C000-000000000046}\ = "{00021401-0000-0000-C000-000000000046}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellNew	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\Open\Command	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{00021500-0000-0000-C000-000000000046}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{FBF23B80-E3F0-101B-8488-00AA003E56F8}\ = "{FBF23B40-E3F0-101B-8488-00AA003E56F8}"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ = "lnkfile"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{000214F9-0000-0000-C000-000000000046}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellNew\Command = "rundll32.exe appwiz.cpl,NewLinkHere %1"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\ShellFolder\	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ = "InternetShortcut"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{000214EE-0000-0000-C000-000000000046}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{000214EE-0000-0000-C000-000000000046}\ = "{00021401-0000-0000-C000-000000000046}"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\LocalizedString = "@shdoclc.dll,-880"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\Open\ = "´ò¿ªÖ÷Ò³(&H)"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\ÊôÐÔ\Command	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{000214EE-0000-0000-C000-000000000046}	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{CABB0DA0-DA57-11CF-9974-0020AFD79762}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{CABB0DA0-DA57-11CF-9974-0020AFD79762}\ = "{FBF23B40-E3F0-101B-8488-00AA003E56F8}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\DefaultIcon	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\DefaultIcon\ = "shdoclc.dll,-190"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\ÊôÐÔ	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{00021500-0000-0000-C000-000000000046}\ = "{FBF23B40-E3F0-101B-8488-00AA003E56F8}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}\ = "{00021401-0000-0000-C000-000000000046}"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\ÊôÐÔ\ = "ÊôÐÔ(&R)"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\ÊôÐÔ\Command\ = "Rundll32.exe Shell32.dll,Control_RunDLL Inetcpl.cpl"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\PersistentHandler	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{000214F9-0000-0000-C000-000000000046}	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{FBF23B80-E3F0-101B-8488-00AA003E56F8}	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\Open	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\ShellFolder	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.ur1\ShellEx\{000214EE-0000-0000-C000-000000000046}\ = "{FBF23B40-E3F0-101B-8488-00AA003E56F8}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{00021500-0000-0000-C000-000000000046}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.1nk\ShellEx\{00021500-0000-0000-C000-000000000046}\ = "{00021401-0000-0000-C000-000000000046}"	regedit.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\InfoTip = "@shdoclc.dll,-881"	regedit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{27AEF9E8-663F-0757-829C-A93675896E86}\Shell\Open\Command\ = "IEXPLORE.EXE %w%w%w.93%119%15.%c%o%m"	regedit.exe

Runs regedit.exe 3 IoCs

pid	Process
4936	regedit.exe
4904	regedit.exe
4872	regedit.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1188 wrote to memory of 4872	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	82
PID 1188 wrote to memory of 4872	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	82
PID 1188 wrote to memory of 4872	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	82
PID 1188 wrote to memory of 4936	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	83
PID 1188 wrote to memory of 4936	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	83
PID 1188 wrote to memory of 4936	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	83
PID 1188 wrote to memory of 4884	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	84
PID 1188 wrote to memory of 4884	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	84
PID 1188 wrote to memory of 4884	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	84
PID 1188 wrote to memory of 4904	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	86
PID 1188 wrote to memory of 4904	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	86
PID 1188 wrote to memory of 4904	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	86
PID 1188 wrote to memory of 2156	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	89
PID 1188 wrote to memory of 2156	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	89
PID 1188 wrote to memory of 2156	1188	6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe	89
PID 2156 wrote to memory of 1808	2156	cmd.exe	91
PID 2156 wrote to memory of 1808	2156	cmd.exe	91
PID 2156 wrote to memory of 1808	2156	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe
"C:\Users\Admin\AppData\Local\Temp\6b255a1604756b2b862ed301a5341b12900f9405a378be6e6f49197c810c8554.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Windows\SysWOW64\regedit.exe
  regedit /s C:\Users\Admin\AppData\Local\Temp\$rar10656.tmp
  2⤵
  - Modifies registry class
  - Runs regedit.exe
  PID:4872
- C:\Windows\SysWOW64\regedit.exe
  regedit /s C:\Users\Admin\AppData\Local\Temp\$10943.tmp
  2⤵
  - Runs regedit.exe
  PID:4936
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$edbs.bat
  2⤵
  PID:4884
- C:\Windows\SysWOW64\regedit.exe
  C:\Windows\regedit.exe /s C:\Users\Admin\AppData\Local\Temp\okhhhik.tmp
  2⤵
  - Modifies registry class
  - Runs regedit.exe
  PID:4904
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\$$dmsf.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2156
- - C:\Windows\SysWOW64\reg.exe
    reg delete HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU /f
    3⤵
    PID:1808

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\$$dmsf.bat

Filesize
665B

MD5
d856f1fe03701148c3e9189c6210a00d

SHA1
95c0cc3185d0876e2ddcaead82393395f7fb0c13

SHA256
0fc53d795c1ce09989b29b8c9cf77367396890db047e1c2dff362962f98af5f3

SHA512
d42c3c1b8d7734e4ebca3513ddf9728e89be1dfb4c2b5591c9f7d0c9c9556bf2b0595e1797b3a51f205a151a20bbdd9a4365abb9f8aab87a7541da312fb03635

Download Submit
C:\Users\Admin\AppData\Local\Temp\$$edbs.bat

Filesize
59B

MD5
0cf180f20e716094bef34db0f1a39a04

SHA1
f8e9da5d8eaf347b240a77c6a9c4f494d4fc351b

SHA256
2a72298ec1d957d1d225aec50a4e6e32c5dec2f2645f25e580304e5c7ae5bb26

SHA512
a471fee35dfc685effb46fcc37d47d7210fad3fdba7cb5342b13e11f95ae7690e4053b3399bca6da7546015a479ce55a301c6934be8bab7ec9eae5aece8bdb3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\$rar10656.tmp

Filesize
1KB

MD5
f9ce5c8a3059991babf4084151caa492

SHA1
26567f89a885b0e69f24309c3e5c58e8e938f841

SHA256
e82c214f33cad1b25146758e22fd887b15f63b1a7a8d716b358c50dc5c3d4e96

SHA512
cce48827588aa5968453a8a69baeab8435083dca1d625d079b01d4f9292c7bcb85ab1217f1cf96ea301eef49b7a96a76b58413d4496f1c35e234df7c7e5c9750

Download Submit
C:\Users\Admin\AppData\Local\Temp\$rar10943.tmp

Filesize
142B

MD5
1722b85f05faa97e09cc1d98002d0711

SHA1
0a2ec5d60f6c8af838fc004e8fbb0b436437887f

SHA256
2c428a167d8dabe9b4e4e821f5d56333962208ef44bc0becbf9c968f1e583e21

SHA512
40393e3b6f958a2b0303810ba3653f55b18ff22439df78487752c92cbe0a510120b2a078b31805980ae2ceaa4465674bfc2ce03803988481fd633e2b9c3ca3b8

Download Submit
C:\Users\Admin\AppData\Local\Temp\okhhhik.tmp

Filesize
4KB

MD5
e65d0630e7c3363eff81fd64109c3dac

SHA1
062d18f42ff35760bed198d51c1056a42c22bfba

SHA256
286db12cc30d8834f18cbc2d72aab3cbc8ab4c515dc8f4e124c82eaa61e4061d

SHA512
d4921c73729c5a00f9f2348d93cd0db827ea17cb45295f0f0b05d99597a241dab7703b674dd107e7a9d15854765b279af7d4f6b7ab8c44a1e658e361c63c0559

Download Submit
C:\Windows\RtkSYUdp.exe

Filesize
30KB

MD5
d0cd586c5c857850a188e778b971f25a

SHA1
3f584fd89e41151c389b4701d876d2bdd2885fc2

SHA256
2f6cd2ed9806a09fecce1f96cd5b3f77fc0339ddbbb4c31aab25e85fd3f268eb

SHA512
995f539c7163e0e49c7cc4687dd29dac4ac88501410d8c9935f99d993b14bf5fe349cdcdc9f61d4f308c280536b54f54ae7d041565c73a2340881f68e7b2c41c

Download Submit
memory/1188-142-0x0000000000400000-0x00000000004E7000-memory.dmp

Filesize
924KB

Download
memory/1188-132-0x0000000000400000-0x00000000004E7000-memory.dmp

Filesize
924KB

Download