anchordns | f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3

General

Target

f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe
Size

162KB
MD5

35229446728ec9bbeae1599c13e86d82
SHA1

c759203d19d86540b6c1efa6eec6aab9ed25470d
SHA256

f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3
SHA512

597b3a0e315752ac24bcd11ea2992bdc6c47c575f6385b209a56065da35a074340aceb56f01d29e7486e84bf3cb124d3f00adff399cebca3cbfa219ebb2b5feb

Score

10^/10

anchordns backdoor

Malware Config

Signatures

AnchorDNS Backdoor
A backdoor which communicates with C2 through DNS, attributed to the creators of Trickbot and Bazar.
backdoor anchordns

Detected AnchorDNS Backdoor 2 IoCs

Sample triggered yara rules associated with the AnchorDNS malware family.

backdoor

resource	yara_rule
behavioral1/files/0x0008000000012213-56.dat	family_anchor_dns
behavioral1/files/0x0008000000012213-57.dat	family_anchor_dns

Executes dropped EXE 1 IoCs

pid	Process
560	sihlknnk.exe

Deletes itself 1 IoCs

pid	Process
772	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\sihlknnk.exe:$FILE	sihlknnk.exe
File created	C:\Windows\SysWOW64\sihlknnk.exe	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe
File opened for modification	C:\Windows\SysWOW64\sihlknnk.exe	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe
File opened for modification	C:\Windows\SysWOW64\sihlknnk.exe:$TASK	sihlknnk.exe
File opened for modification	C:\Windows\SysWOW64\sihlknnk.exe:$GUID	sihlknnk.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1484	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1292	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1292	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1908 wrote to memory of 560	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	27
PID 1908 wrote to memory of 560	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	27
PID 1908 wrote to memory of 560	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	27
PID 1908 wrote to memory of 560	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	27
PID 1908 wrote to memory of 772	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	28
PID 1908 wrote to memory of 772	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	28
PID 1908 wrote to memory of 772	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	28
PID 1908 wrote to memory of 772	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	28
PID 1908 wrote to memory of 696	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	29
PID 1908 wrote to memory of 696	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	29
PID 1908 wrote to memory of 696	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	29
PID 1908 wrote to memory of 696	1908	f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe	29
PID 772 wrote to memory of 1484	772	cmd.exe	32
PID 772 wrote to memory of 1484	772	cmd.exe	32
PID 772 wrote to memory of 1484	772	cmd.exe	32
PID 772 wrote to memory of 1484	772	cmd.exe	32
PID 696 wrote to memory of 1292	696	cmd.exe	33
PID 696 wrote to memory of 1292	696	cmd.exe	33
PID 696 wrote to memory of 1292	696	cmd.exe	33
PID 696 wrote to memory of 1292	696	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe
"C:\Users\Admin\AppData\Local\Temp\f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1908
- C:\Windows\SysWOW64\sihlknnk.exe
  C:\Windows\SysWOW64\sihlknnk.exe -i
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:560
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c timeout 3 && del C:\Users\Admin\AppData\Local\Temp\f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:772
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1484
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /C PowerShell "Start-Sleep 3; Remove-Item C:\Users\Admin\AppData\Local\Temp\f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:696
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    PowerShell "Start-Sleep 3; Remove-Item C:\Users\Admin\AppData\Local\Temp\f7278cd22070f0418ac75b599b8bcc524ee9d6adbda4103d149c9484cdaeb4f3.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1292

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/1292-61-0x00000000023F0000-0x000000000303A000-memory.dmp

Filesize
12.3MB

Download
memory/1292-62-0x00000000023F0000-0x000000000303A000-memory.dmp

Filesize
12.3MB

Download
memory/1908-55-0x0000000076731000-0x0000000076733000-memory.dmp

Filesize
8KB

Download

Analysis

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