buer | 5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

General

Target

f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe
Size

232KB
MD5

f267d07c82912e0222666aa2cdc4cbee
SHA1

630f7d9cbbb0af1a0d90502bc4be4dbc32b458de
SHA256

5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3
SHA512

1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42
SSDEEP

3072:8nkoa1KCPowRKbP7L10uxE232hxeF6HGqZ:ekoaVHa9x32hxq8Go

Score

10^/10

buer discovery 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 9 IoCs

Detects Buer loader in memory or disk.

loader

resource	yara_rule
behavioral2/memory/4332-2-0x0000000000480000-0x0000000000489000-memory.dmp	buer
behavioral2/memory/4332-3-0x0000000040000000-0x000000004000B000-memory.dmp	buer
behavioral2/memory/4216-10-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4332-13-0x0000000040000000-0x000000004000B000-memory.dmp	buer
behavioral2/memory/4332-12-0x0000000000480000-0x0000000000489000-memory.dmp	buer
behavioral2/memory/4332-11-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4216-14-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4216-15-0x0000000040000000-0x000000004318E000-memory.dmp	buer
behavioral2/memory/4216-29-0x0000000040000000-0x000000004318E000-memory.dmp	buer

Executes dropped EXE 1 IoCs

pid	Process
4216	manager.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\ActiveX Component = "C:\\Users\\Admin\\AppData\\Roaming\\ActiveX\\manager.exe"	manager.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
4672	4332	WerFault.exe	81
3904	756	WerFault.exe	86
1064	756	WerFault.exe	86

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	manager.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	secinit.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4216	manager.exe
4216	manager.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4332 wrote to memory of 4216	4332	f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe	82
PID 4332 wrote to memory of 4216	4332	f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe	82
PID 4332 wrote to memory of 4216	4332	f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe	82
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86
PID 4216 wrote to memory of 756	4216	manager.exe	86

C:\Users\Admin\AppData\Local\Temp\f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4332
- C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
  C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe "C:\Users\Admin\AppData\Local\Temp\f267d07c82912e0222666aa2cdc4cbee_JaffaCakes118.exe" ensgJJ
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\SysWOW64\secinit.exe
    C:\Users\Admin\AppData\Roaming\ActiveX\manager.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:756
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 272
      4⤵
      Program crash
      PID:3904
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 280
      4⤵
      Program crash
      PID:1064
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4332 -s 472
  2⤵
  - Program crash
  PID:4672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4332 -ip 4332
1⤵
PID:1240

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 756 -ip 756
1⤵
PID:1440

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 756 -ip 756
1⤵
PID:1824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
232KB

MD5
f267d07c82912e0222666aa2cdc4cbee

SHA1
630f7d9cbbb0af1a0d90502bc4be4dbc32b458de

SHA256
5c7f5813142029aa1a1326ebef5b7664ab93e0c6bb40cbb40bf9146556a783f3

SHA512
1ccfb880532191238f8a1da2448b83ba7128868431b65909bbc7ebfc29a87ab6bc1060ac56b736d769edb8d703b655f9d5fb13fd18bbc1257dfaba0a8d8bdc42

Download Submit
memory/756-9-0x0000000004070000-0x0000000004071000-memory.dmp

Filesize
4KB

Download
memory/4216-10-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4216-14-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4216-15-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4216-29-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download
memory/4332-1-0x00000000004B0000-0x00000000005B0000-memory.dmp

Filesize
1024KB

Download
memory/4332-2-0x0000000000480000-0x0000000000489000-memory.dmp

Filesize
36KB

Download
memory/4332-3-0x0000000040000000-0x000000004000B000-memory.dmp

Filesize
44KB

Download
memory/4332-13-0x0000000040000000-0x000000004000B000-memory.dmp

Filesize
44KB

Download
memory/4332-12-0x0000000000480000-0x0000000000489000-memory.dmp

Filesize
36KB

Download
memory/4332-11-0x0000000040000000-0x000000004318E000-memory.dmp

Filesize
49.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads