f00e4480a92e46fa7a38dcd06c03ba54ddbe61b0edbe5ac303c0eed6453b0f41

Analysis

max time kernel
1s
max time network
118s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
26/12/2023, 12:17

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General

Target

6dde0ef221978abe0a4dc088dc5dde52.exe
Size

53KB
MD5

6dde0ef221978abe0a4dc088dc5dde52
SHA1

cdbe09c9922f34c1f77d29abdf2e83c7704afef7
SHA256

f00e4480a92e46fa7a38dcd06c03ba54ddbe61b0edbe5ac303c0eed6453b0f41
SHA512

3e17623cb8efbf312f0e480136a27aeefb7d6e87f66c91269296a0b9a38c1f4e06e7019d87570f732524fb7961c8c29e374fc1ee6e404e67ceaf18dcfb3664e4
SSDEEP

1536:Yk8s7JfjsCwzvEymEWc94qxdRHdno858c5Fgs0:YkTJfjsCw7FWujxDdnE

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 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\Shell = "Explorer.exe \"C:\\Windows\\o4251227.exe\""	6dde0ef221978abe0a4dc088dc5dde52.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\j6251222.exe"	6dde0ef221978abe0a4dc088dc5dde52.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	6dde0ef221978abe0a4dc088dc5dde52.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	6dde0ef221978abe0a4dc088dc5dde52.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\N3948c = "\"C:\\Windows\\_default25122.pif\""	6dde0ef221978abe0a4dc088dc5dde52.exe
Key created	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	6dde0ef221978abe0a4dc088dc5dde52.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\f1464Adm = "\"C:\\Users\\Admin\\AppData\\Local\\dv692700x\\yesbron.com\""	6dde0ef221978abe0a4dc088dc5dde52.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	6dde0ef221978abe0a4dc088dc5dde52.exe

Disables RegEdit via registry modification 1 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	6dde0ef221978abe0a4dc088dc5dde52.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\f1464Adm = "\"C:\\Windows\\system32\\s4827\\zh59927084y.exe\""	6dde0ef221978abe0a4dc088dc5dde52.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\N3948c = "\"C:\\Windows\\j6251222.exe\""	6dde0ef221978abe0a4dc088dc5dde52.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\s4827\zh59927084y.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\SysWOW64\s4827\zh59927084y.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\SysWOW64\msvbvm60.dll	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\SysWOW64\s4827	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\SysWOW64\s4827\smss.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\SysWOW64\s4827\smss.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\SysWOW64\c_25122k.com	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\SysWOW64\c_25122k.com	6dde0ef221978abe0a4dc088dc5dde52.exe

Drops file in Windows directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\j6251222.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\j6251222.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\o4251227.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\o4251227.exe	6dde0ef221978abe0a4dc088dc5dde52.exe
File opened for modification	C:\Windows\_default25122.pif	6dde0ef221978abe0a4dc088dc5dde52.exe
File created	C:\Windows\_default25122.pif	6dde0ef221978abe0a4dc088dc5dde52.exe

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

System Information Discovery
T1082

Discovers systems in the same network 1 TTPs 2 IoCs

discovery

Remote System Discovery

T1018

pid	Process
2136	net.exe
2608	net.exe

C:\Users\Admin\AppData\Local\Temp\6dde0ef221978abe0a4dc088dc5dde52.exe
"C:\Users\Admin\AppData\Local\Temp\6dde0ef221978abe0a4dc088dc5dde52.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Adds policy Run key to start application
- Disables RegEdit via registry modification
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
PID:1404
- C:\Windows\SysWOW64\s4827\smss.exe
  "C:\Windows\system32\s4827\smss.exe" ~Brontok~Log~
  2⤵
  PID:2164

C:\Windows\SysWOW64\s4827\winlogon.exe
"C:\Windows\system32\s4827\winlogon.exe" ~Brontok~Is~The~Best~
1⤵
PID:2720
- C:\Windows\SysWOW64\s4827\services.exe
  "C:\Windows\system32\s4827\services.exe" ~Brontok~Serv~
  2⤵
  PID:2752
- C:\Windows\SysWOW64\at.exe
  "C:\Windows\System32\at.exe" /delete /y
  2⤵
  PID:708
- C:\Windows\SysWOW64\s4827\m4623.exe
  "C:\Windows\system32\s4827\m4623.exe" ~Brontok~Back~Log~
  2⤵
  PID:2988
- C:\Windows\Ad10218\qm4623.exe
  "C:\Windows\Ad10218\qm4623.exe" ~Brontok~Back~Log~
  2⤵
  PID:1792
- C:\Windows\SysWOW64\s4827\lsass.exe
  "C:\Windows\system32\s4827\lsass.exe" ~Brontok~Network~
  2⤵
  PID:2804
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c net view /domain > "C:\Windows\system32\s4827\domlist.txt"
    3⤵
    PID:1424
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Windows\system32\s4827\brdom.bat" "
    3⤵
    PID:2692
  - - C:\Windows\SysWOW64\net.exe
      net view /domain:WORKGROUP
      4⤵
      Discovers systems in the same network
      PID:2608
- C:\Windows\SysWOW64\s4827\csrss.exe
  "C:\Windows\system32\s4827\csrss.exe" ~Brontok~SpreadMail~
  2⤵
  PID:1664
- C:\Windows\SysWOW64\at.exe
  "C:\Windows\System32\at.exe" 17:08 /every:M,T,W,Th,F,S,Su "C:\Users\Admin\AppData\Local\jalak-93927015-bali.com"
  2⤵
  PID:1960
- C:\Windows\SysWOW64\at.exe
  "C:\Windows\System32\at.exe" 11:03 /every:M,T,W,Th,F,S,Su "C:\Users\Admin\AppData\Local\jalak-93927015-bali.com"
  2⤵
  PID:1632

C:\Windows\SysWOW64\net.exe
net view /domain
1⤵
- Discovers systems in the same network
PID:2136

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\s4827\smss.exe

Filesize
53KB

MD5
6dde0ef221978abe0a4dc088dc5dde52

SHA1
cdbe09c9922f34c1f77d29abdf2e83c7704afef7

SHA256
f00e4480a92e46fa7a38dcd06c03ba54ddbe61b0edbe5ac303c0eed6453b0f41

SHA512
3e17623cb8efbf312f0e480136a27aeefb7d6e87f66c91269296a0b9a38c1f4e06e7019d87570f732524fb7961c8c29e374fc1ee6e404e67ceaf18dcfb3664e4

Download Submit
memory/1404-24-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1404-22-0x0000000002FD0000-0x0000000002FF1000-memory.dmp

Filesize
132KB

Download
memory/1404-0-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1404-17-0x0000000002FD0000-0x0000000002FF1000-memory.dmp

Filesize
132KB

Download
memory/1664-298-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-300-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-742-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-942-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-638-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-1067-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-405-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-494-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-845-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-1169-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-403-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/1792-1254-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2164-187-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2164-53-0x0000000002FA0000-0x0000000002FC1000-memory.dmp

Filesize
132KB

Download
memory/2720-112-0x0000000000600000-0x0000000000621000-memory.dmp

Filesize
132KB

Download
memory/2720-381-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-352-0x0000000000600000-0x0000000000621000-memory.dmp

Filesize
132KB

Download
memory/2720-353-0x0000000000600000-0x0000000000621000-memory.dmp

Filesize
132KB

Download
memory/2720-1142-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-1249-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-1356-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-490-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-1038-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-600-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-938-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-269-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-708-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-110-0x0000000000600000-0x0000000000621000-memory.dmp

Filesize
132KB

Download
memory/2720-54-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2720-818-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-297-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-1165-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-1357-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-842-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-739-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-939-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-1251-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-1040-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-601-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2752-491-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2804-744-0x0000000001E30000-0x0000000001E3E000-memory.dmp

Filesize
56KB

Download
memory/2804-299-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2804-496-0x0000000001E30000-0x0000000001E3E000-memory.dmp

Filesize
56KB

Download
memory/2988-1068-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-495-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-743-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-1170-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-404-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-1255-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-639-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-943-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-846-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download
memory/2988-301-0x0000000000400000-0x0000000000420040-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads