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

Processes:

resource	yara_rule
behavioral2/memory/4092-132-0x0000000002130000-0x0000000002139000-memory.dmp	buer
behavioral2/memory/4092-136-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4984-140-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4092-141-0x0000000040000000-0x000000004318E000-memory.dmp	buer

Executes dropped EXE 1 IoCs

Processes:

manager.exe

pid process

4984 manager.exe

pid	process
4984	manager.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

manager.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe

Program crash 3 IoCs

Processes:

WerFault.exeWerFault.exeWerFault.exe

pid	pid_target	process	target process
4388	4092	WerFault.exe	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe
3148	548	WerFault.exe	secinit.exe
920	548	WerFault.exe	secinit.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

manager.exe

pid process

4984 manager.exe
4984 manager.exe

pid	process
4984	manager.exe
4984	manager.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exemanager.exe

description	pid	process	target process
PID 4092 wrote to memory of 4984	4092	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	manager.exe
PID 4092 wrote to memory of 4984	4092	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	manager.exe
PID 4092 wrote to memory of 4984	4092	5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe	manager.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe
PID 4984 wrote to memory of 548	4984	manager.exe	secinit.exe

C:\Users\Admin\AppData\Local\Temp\5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe
"C:\Users\Admin\AppData\Local\Temp\5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4092

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
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4984

C:\Windows\SysWOW64\secinit.exe
C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
3⤵
PID:548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 548 -s 272
4⤵
- Program crash
PID:3148

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 548 -s 280
4⤵
- Program crash
PID:920

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4092 -s 436
2⤵
- Program crash
PID:4388

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4092 -ip 4092
1⤵
PID:4352

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 548 -ip 548
1⤵
PID:3120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 548 -ip 548
1⤵
PID:4168

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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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
memory/548-142-0x0000000000A00000-0x0000000003B8E000-memory.dmp

Filesize
49.6MB

Download
memory/548-138-0x0000000000000000-mapping.dmp

Download
memory/4092-141-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4092-131-0x0000000000594000-0x000000000059B000-memory.dmp

Filesize
28KB

Download
memory/4092-132-0x0000000002130000-0x0000000002139000-memory.dmp

Filesize
36KB

Download
memory/4092-130-0x0000000000594000-0x000000000059B000-memory.dmp

Filesize
28KB

Download
memory/4092-136-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4984-133-0x0000000000000000-mapping.dmp

Download
memory/4984-140-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4984-139-0x0000000000575000-0x000000000057C000-memory.dmp

Filesize
28KB

Download
memory/4984-137-0x0000000000575000-0x000000000057C000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads