buer | 560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c

General

Target

560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe
Size

169KB
MD5

3fdd3f9ed517441aaab8b67eb40211f5
SHA1

e67303a8e18c7b45ca1b402d3d895785432fbd35
SHA256

560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c
SHA512

20f88ecf5b9e8c6ffbaba836ac5b7f5ff260be1ce7d2069c6d30b138d15f7875882e4e23f860ce783a4e2eb8b2d9cbd9fc120c209e15ab874a57e0f1095f15c2

Score

10^/10

buer loader persistence

Malware Config

Extracted

Family

buer

C2

https://gstatiknetiplist.cc/

https://gstatiknetiplist.com/

Signatures

Buer
Buer is a new modular loader first seen in August 2019.
loader buer

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\ProgramData\\RedTools\\networker.exe\""	networker.exe

Buer Loader 3 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/968-56-0x0000000000020000-0x000000000002A000-memory.dmp	buer
behavioral1/memory/968-57-0x0000000040000000-0x000000004049D000-memory.dmp	buer
behavioral1/memory/1984-65-0x0000000040000000-0x000000004049D000-memory.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
1984	networker.exe

Deletes itself 1 IoCs

pid	Process
1984	networker.exe

Loads dropped DLL 2 IoCs

pid	Process
968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe
968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe

Enumerates connected drives 3 TTPs 24 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\R:	networker.exe
File opened (read-only)	\??\T:	networker.exe
File opened (read-only)	\??\U:	networker.exe
File opened (read-only)	\??\B:	networker.exe
File opened (read-only)	\??\G:	networker.exe
File opened (read-only)	\??\I:	networker.exe
File opened (read-only)	\??\K:	networker.exe
File opened (read-only)	\??\Q:	networker.exe
File opened (read-only)	\??\Z:	networker.exe
File opened (read-only)	\??\O:	networker.exe
File opened (read-only)	\??\P:	networker.exe
File opened (read-only)	\??\V:	networker.exe
File opened (read-only)	\??\W:	networker.exe
File opened (read-only)	\??\A:	networker.exe
File opened (read-only)	\??\H:	networker.exe
File opened (read-only)	\??\L:	networker.exe
File opened (read-only)	\??\S:	networker.exe
File opened (read-only)	\??\Y:	networker.exe
File opened (read-only)	\??\X:	networker.exe
File opened (read-only)	\??\E:	networker.exe
File opened (read-only)	\??\F:	networker.exe
File opened (read-only)	\??\J:	networker.exe
File opened (read-only)	\??\M:	networker.exe
File opened (read-only)	\??\N:	networker.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1968	1716	WerFault.exe	29

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1984	networker.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 1984	968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe	28
PID 968 wrote to memory of 1984	968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe	28
PID 968 wrote to memory of 1984	968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe	28
PID 968 wrote to memory of 1984	968	560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe	28
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1984 wrote to memory of 1716	1984	networker.exe	29
PID 1716 wrote to memory of 1968	1716	secinit.exe	30
PID 1716 wrote to memory of 1968	1716	secinit.exe	30
PID 1716 wrote to memory of 1968	1716	secinit.exe	30
PID 1716 wrote to memory of 1968	1716	secinit.exe	30

C:\Users\Admin\AppData\Local\Temp\560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe
"C:\Users\Admin\AppData\Local\Temp\560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:968
- C:\ProgramData\RedTools\networker.exe
  C:\ProgramData\RedTools\networker.exe "C:\Users\Admin\AppData\Local\Temp\560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c.exe" ensgJJ
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Deletes itself
  - Enumerates connected drives
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Windows\SysWOW64\secinit.exe
    C:\ProgramData\RedTools\networker.exe
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1716
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1716 -s 136
      4⤵
      Program crash
      PID:1968

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\RedTools\networker.exe

Filesize
169KB

MD5
3fdd3f9ed517441aaab8b67eb40211f5

SHA1
e67303a8e18c7b45ca1b402d3d895785432fbd35

SHA256
560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c

SHA512
20f88ecf5b9e8c6ffbaba836ac5b7f5ff260be1ce7d2069c6d30b138d15f7875882e4e23f860ce783a4e2eb8b2d9cbd9fc120c209e15ab874a57e0f1095f15c2

Download Submit
C:\ProgramData\RedTools\networker.exe

Filesize
169KB

MD5
3fdd3f9ed517441aaab8b67eb40211f5

SHA1
e67303a8e18c7b45ca1b402d3d895785432fbd35

SHA256
560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c

SHA512
20f88ecf5b9e8c6ffbaba836ac5b7f5ff260be1ce7d2069c6d30b138d15f7875882e4e23f860ce783a4e2eb8b2d9cbd9fc120c209e15ab874a57e0f1095f15c2

Download Submit
\ProgramData\RedTools\networker.exe

Filesize
169KB

MD5
3fdd3f9ed517441aaab8b67eb40211f5

SHA1
e67303a8e18c7b45ca1b402d3d895785432fbd35

SHA256
560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c

SHA512
20f88ecf5b9e8c6ffbaba836ac5b7f5ff260be1ce7d2069c6d30b138d15f7875882e4e23f860ce783a4e2eb8b2d9cbd9fc120c209e15ab874a57e0f1095f15c2

Download Submit
\ProgramData\RedTools\networker.exe

Filesize
169KB

MD5
3fdd3f9ed517441aaab8b67eb40211f5

SHA1
e67303a8e18c7b45ca1b402d3d895785432fbd35

SHA256
560269fb9344b2ec68e2f78933eb1f0dcee04e688566cbb2213cb0c5fbbf281c

SHA512
20f88ecf5b9e8c6ffbaba836ac5b7f5ff260be1ce7d2069c6d30b138d15f7875882e4e23f860ce783a4e2eb8b2d9cbd9fc120c209e15ab874a57e0f1095f15c2

Download Submit
memory/968-56-0x0000000000020000-0x000000000002A000-memory.dmp

Filesize
40KB

Download
memory/968-55-0x000000000036A000-0x0000000000371000-memory.dmp

Filesize
28KB

Download
memory/968-57-0x0000000040000000-0x000000004049D000-memory.dmp

Filesize
4.6MB

Download
memory/968-54-0x0000000075B61000-0x0000000075B63000-memory.dmp

Filesize
8KB

Download
memory/1716-73-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1716-66-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1716-67-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1716-69-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1716-71-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1716-75-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/1716-79-0x00000000002C0000-0x000000000075D000-memory.dmp

Filesize
4.6MB

Download
memory/1984-64-0x000000000050A000-0x0000000000511000-memory.dmp

Filesize
28KB

Download
memory/1984-65-0x0000000040000000-0x000000004049D000-memory.dmp

Filesize
4.6MB

Download

Analysis

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