buer | 5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

General

Target

5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe
Size

232KB
MD5

f267d07c82912e0222666aa2cdc4cbee
SHA1

630f7d9cbbb0af1a0d90502bc4be4dbc32b458de
SHA256

5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3
SHA512

1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Score

10^/10

buer loader persistence

Malware Config

Extracted

Family

buer

C2

http://45.12.32.252:8080/

Signatures

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

Buer Loader 4 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral1/memory/1972-61-0x0000000000220000-0x0000000000229000-memory.dmp	buer
behavioral1/memory/1972-62-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral1/memory/904-70-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral1/memory/904-84-0x0000000040000000-0x000000004318E000-memory.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
904	manager.exe

Deletes itself 1 IoCs

pid	Process
904	manager.exe

Loads dropped DLL 2 IoCs

pid	Process
1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe
1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
904	manager.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 904	1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	27
PID 1972 wrote to memory of 904	1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	27
PID 1972 wrote to memory of 904	1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	27
PID 1972 wrote to memory of 904	1972	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	27
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28
PID 904 wrote to memory of 1512	904	manager.exe	28

C:\Users\Admin\AppData\Local\Temp\5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe
"C:\Users\Admin\AppData\Local\Temp\5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe" ensgJJ
  2⤵
  - Executes dropped EXE
  - Deletes itself
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:904
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    PID:1512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
232KB

MD5
f267d07c82912e0222666aa2cdc4cbee

SHA1
630f7d9cbbb0af1a0d90502bc4be4dbc32b458de

SHA256
5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

SHA512
1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Download Submit
C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
232KB

MD5
f267d07c82912e0222666aa2cdc4cbee

SHA1
630f7d9cbbb0af1a0d90502bc4be4dbc32b458de

SHA256
5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

SHA512
1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Download Submit
\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
232KB

MD5
f267d07c82912e0222666aa2cdc4cbee

SHA1
630f7d9cbbb0af1a0d90502bc4be4dbc32b458de

SHA256
5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

SHA512
1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Download Submit
\Users\Admin\AppData\Roaming\ActiveX\manager.exe

Filesize
232KB

MD5
f267d07c82912e0222666aa2cdc4cbee

SHA1
630f7d9cbbb0af1a0d90502bc4be4dbc32b458de

SHA256
5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

SHA512
1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Download Submit
memory/904-63-0x000000000042A000-0x0000000000431000-memory.dmp

Filesize
28KB

Download
memory/904-84-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/904-70-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/904-68-0x000000000042A000-0x0000000000431000-memory.dmp

Filesize
28KB

Download
memory/1512-77-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-73-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-66-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-83-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-67-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-71-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-80-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/1512-75-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1512-79-0x0000000000700000-0x000000000388E000-memory.dmp

Filesize
49.6MB

Download
memory/1972-54-0x000000000054A000-0x0000000000551000-memory.dmp

Filesize
28KB

Download
memory/1972-62-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/1972-60-0x000000000054A000-0x0000000000551000-memory.dmp

Filesize
28KB

Download
memory/1972-61-0x0000000000220000-0x0000000000229000-memory.dmp

Filesize
36KB

Download
memory/1972-55-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

Filesize
8KB

Download

Analysis

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