b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a

Analysis

max time kernel
183s
max time network
215s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2022 17:35

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General

Target

b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Size

289KB
MD5

7a94b6c91e6908ba2439801f2f535c1e
SHA1

8c185559ecd589b38785fecbf427f005fc7b91d8
SHA256

b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a
SHA512

4eafabf42291751c38dd3eb64bacd51fad3d6b686a2482091482f250db0bf2dbf991ba968628855fedb5dca5378fd0eba5865f28f8a3a767697fbcdd2152c357
SSDEEP

6144:C5O8bsgmfSO/9xxY3hkm1ZDLZA3M7KrD37lSCVzhhyF:TimqOYGmvLZA3M7KrDJVq

Score

8^/10

bootkit persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3564	SeFastInstall2_3218.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00070000000231a6-134.dat	upx
behavioral2/files/0x00070000000231a6-135.dat	upx
behavioral2/memory/3564-141-0x0000000000400000-0x00000000004AB000-memory.dmp	upx

Loads dropped DLL 5 IoCs

pid	Process
2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe

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	SeFastInstall2_3218.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	\??\c:\windows\taobao.ico	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe

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

System Information Discovery
T1082

Modifies registry class 32 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\TypeLib	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\DefaultIcon	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\DefaultIcon\ = "c:\\windows\\taobao.ico"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\Shell\Internet Explorer\Command\ = "C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe http://www.05zw.com/taobao/taobao.html"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\ShellFolder\Attributes = "0"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\TypeLib	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\Shell	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\InfoTip = "Internet Explorer"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\Shell\Internet Explorer	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\Shell\Internet Explorer\Command	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\Shell	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\Shell\Internet Explorer\Command	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\ShellFolder	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\InfoTip = "ÌÔ±¦-ÌØ¼Û"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\DefaultIcon\ = "C:\\Windows\\SysWow64\\SHELL32.DLL,220"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\Shell\Internet Explorer\Command\ = "C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe http://www.pp2345.com"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\TypeLib\ = "{4CBF83AF-4040-4425-AF5C-D73309A4C190}"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\DefaultIcon	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\Shell\Internet Explorer	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\ShellFolder	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\ShellFolder\Attributes = "0"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\TypeLib\ = "{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4CBF83AF-4040-4425-AF5C-D73309A4C190}\ = "Internet Explorer"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{EF2B9DCD-E16C-4CCE-8D71-2745C0E8B2F8}\ = "ÌÔ±¦-ÌØ¼Û"	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3564	SeFastInstall2_3218.exe
3564	SeFastInstall2_3218.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 3564	2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe	86
PID 2724 wrote to memory of 3564	2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe	86
PID 2724 wrote to memory of 3564	2724	b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe	86

C:\Users\Admin\AppData\Local\Temp\b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe
"C:\Users\Admin\AppData\Local\Temp\b988903b6d5799a4b1c0783c09e52c3440d74de2fd345270fde0633fd718029a.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2724
- C:\Users\Admin\AppData\Local\Temp\SeFastInstall2_3218.exe
  "C:\Users\Admin\AppData\Local\Temp\SeFastInstall2_3218.exe"
  2⤵
  - Executes dropped EXE
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetWindowsHookEx
  PID:3564

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

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\SeFastInstall2_3218.exe

Filesize
227KB

MD5
006bcf6d8e9bcda4ad8323f3622e245b

SHA1
45b88bd752ea8853a3aebf5779ae47666253251c

SHA256
8854b97a765d20e2f15cc2da23bd78584bc3f67ec05a7e3f16020690f25d3821

SHA512
4008fbce2719618acd2a4f852a601517935a018f56ff361c4c08a88fb1446f2e35652c8128ed86b313bd198966ffb8892c6ee7000132551d396dbcb40ba48ec0

Download Submit
C:\Users\Admin\AppData\Local\Temp\SeFastInstall2_3218.exe

Filesize
227KB

MD5
006bcf6d8e9bcda4ad8323f3622e245b

SHA1
45b88bd752ea8853a3aebf5779ae47666253251c

SHA256
8854b97a765d20e2f15cc2da23bd78584bc3f67ec05a7e3f16020690f25d3821

SHA512
4008fbce2719618acd2a4f852a601517935a018f56ff361c4c08a88fb1446f2e35652c8128ed86b313bd198966ffb8892c6ee7000132551d396dbcb40ba48ec0

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu78BB.tmp\System.dll

Filesize
11KB

MD5
00a0194c20ee912257df53bfe258ee4a

SHA1
d7b4e319bc5119024690dc8230b9cc919b1b86b2

SHA256
dc4da2ccadb11099076926b02764b2b44ad8f97cd32337421a4cc21a3f5448f3

SHA512
3b38a2c17996c3b77ebf7b858a6c37415615e756792132878d8eddbd13cb06710b7da0e8b58104768f8e475fc93e8b44b3b1ab6f70ddf52edee111aaf5ef5667

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu78BB.tmp\inetc.dll

Filesize
20KB

MD5
8d8fdad7e153d6b82913f6fdc407d12c

SHA1
aabbeed33cd5221e4cb22aab6e48310df94facfd

SHA256
e727c8bba6686c4814602f2bc089af4b4cf3498d1dbe1a08d8c4732da5ba046b

SHA512
42bc0ce1aca63904c34025307fd4b1d9f480ae47e42e7dfa48bbbf8286d947de2989435ad7a748951291307949217afeebcd31d10a1356c9366d3187085773a2

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu78BB.tmp\inetc.dll

Filesize
20KB

MD5
8d8fdad7e153d6b82913f6fdc407d12c

SHA1
aabbeed33cd5221e4cb22aab6e48310df94facfd

SHA256
e727c8bba6686c4814602f2bc089af4b4cf3498d1dbe1a08d8c4732da5ba046b

SHA512
42bc0ce1aca63904c34025307fd4b1d9f480ae47e42e7dfa48bbbf8286d947de2989435ad7a748951291307949217afeebcd31d10a1356c9366d3187085773a2

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu78BB.tmp\md5dll.dll

Filesize
8KB

MD5
a7d710e78711d5ab90e4792763241754

SHA1
f31cecd926c5d497aba163a17b75975ec34beb13

SHA256
9b05dd603f13c196f3f21c43f48834208fed2294f7090fcd1334931014611fb2

SHA512
f0ca2d6f9a8aeac84ef8b051154a041adffc46e3e9aced142e9c7bf5f7272b047e1db421d38cb2d9182d7442bee3dd806618b019ec042a23ae0e71671d2943c0

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsu78BB.tmp\md5dll.dll

Filesize
8KB

MD5
a7d710e78711d5ab90e4792763241754

SHA1
f31cecd926c5d497aba163a17b75975ec34beb13

SHA256
9b05dd603f13c196f3f21c43f48834208fed2294f7090fcd1334931014611fb2

SHA512
f0ca2d6f9a8aeac84ef8b051154a041adffc46e3e9aced142e9c7bf5f7272b047e1db421d38cb2d9182d7442bee3dd806618b019ec042a23ae0e71671d2943c0

Download Submit
memory/2724-140-0x0000000002281000-0x0000000002284000-memory.dmp

Filesize
12KB

Download
memory/3564-133-0x0000000000000000-mapping.dmp

Download
memory/3564-141-0x0000000000400000-0x00000000004AB000-memory.dmp

Filesize
684KB

Download