buer | 874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43

General

Target
874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe
Size 31KB
Sample220625-nen6wsccd3
SHA256 874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43
MD5 f718a59cfa511acd0487c15785410075
SHA1 71920c16526ef5cf41a35d3dbc4d17a6766f61b2
SHA512 a6c995c6ecb251a7159af13bcc76d4beb0e10e166177eb9b42ba547d2b68c7cbaffec7a0a00ad2a1744a366848151582b043fb8ddba53aca00a768f5b4e3968f
MD5 SHA1 SHA512

Score

10^/10

buer loader persistence

Malware Config

Extracted

Family

buer

C2

http://avirasupport.info:8080/
eqqm7,,^sfo^prmmloq+fkcl75-5-,

Signatures

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

Buer Loader 5 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/files/0x0003000000000731-131.dat	buer
behavioral2/files/0x0003000000000731-132.dat	buer
behavioral2/memory/2396-133-0x0000000000000000-mapping.dmp	buer
behavioral2/memory/2396-134-0x0000000000EF0000-0x0000000000EFB000-memory.dmp	buer
behavioral2/memory/2396-135-0x0000000000EF0000-0x0000000000EFB000-memory.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
332	manager.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	manager.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	secinit.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	secinit.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2396	secinit.exe
2396	secinit.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 940 wrote to memory of 332	940	874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe	79
PID 940 wrote to memory of 332	940	874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe	79
PID 940 wrote to memory of 332	940	874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe	79
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80
PID 332 wrote to memory of 2396	332	manager.exe	80

C:\Users\Admin\AppData\Local\Temp\874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe
"C:\Users\Admin\AppData\Local\Temp\874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:940
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43.exe" ensgJJ
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:332
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    PID:2396

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

Loading Replay Monitor...

Downloads

manager.exe

Path C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
Size 31KB
SHA256 874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43
MD5 f718a59cfa511acd0487c15785410075
SHA1 71920c16526ef5cf41a35d3dbc4d17a6766f61b2
SHA512 a6c995c6ecb251a7159af13bcc76d4beb0e10e166177eb9b42ba547d2b68c7cbaffec7a0a00ad2a1744a366848151582b043fb8ddba53aca00a768f5b4e3968f
SSDEEP 384:0CU3XoOVikF0Mha0lz1PnQC8J5y8+3EF9DwBJmvAUh+Iea9WV5UeDBYehvQNoDc9:fK/Nnlz1P9c5y85cmvGf5XYilyflc
MD5 SHA1 SHA512 SSDEEP

Submit Download

manager.exe

Path C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
Size 31KB
SHA256 874645b953560f0016f252f49f008b125d29ee1db139a8b2603d4f63eb5f5d43
MD5 f718a59cfa511acd0487c15785410075
SHA1 71920c16526ef5cf41a35d3dbc4d17a6766f61b2
SHA512 a6c995c6ecb251a7159af13bcc76d4beb0e10e166177eb9b42ba547d2b68c7cbaffec7a0a00ad2a1744a366848151582b043fb8ddba53aca00a768f5b4e3968f
SSDEEP 384:0CU3XoOVikF0Mha0lz1PnQC8J5y8+3EF9DwBJmvAUh+Iea9WV5UeDBYehvQNoDc9:fK/Nnlz1P9c5y85cmvGf5XYilyflc
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2396-134-0x0000000000EF0000-0x0000000000EFB000-memory.dmp

Download

memory/2396-135-0x0000000000EF0000-0x0000000000EFB000-memory.dmp