berbew | 8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0

General

Target

8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Size

661KB
MD5

a1ee201a9e32983c7216a6345b5384b0
SHA1

d93849e60d73645a0b2817bd91d35d3519d7be2a
SHA256

8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0
SHA512

9dd8fdb68dde8529005ff12cb525f4d9753b15517d2efa1952e3cb42394bc1cbd9386d8ed38610368f6ffa58b5666af4e5d82948dc6f970564b5544d939d7a48
SSDEEP

12288:SIt104K8pV6yYP4rbpV6yYPg058KpV6yYPNUir2MhNl6zX3w9As/xO23WM6tJmDs:SIRW4XWleKWNUir2MhNl6zX3w9As/xOn

Score

10^/10

berbew backdoor discovery persistence

Malware Config

Extracted

Family

berbew

C2

http://viruslist.com/wcmd.txt

http://viruslist.com/ppslog.php

http://viruslist.com/piplog.php?%s:%i:%i:%s:%09u:%i:%02d:%02d:%02d

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\Web Event Logger = "{79ECA078-17FF-726B-E811-213280E5C831}"	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe

Berbew
Berbew is a backdoor written in C++.
backdoor berbew

Executes dropped EXE 1 IoCs

pid	Process
2544	Bmenijcd.exe

Loads dropped DLL 6 IoCs

pid	Process
1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
2756	WerFault.exe
2756	WerFault.exe
2756	WerFault.exe
2756	WerFault.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Bmenijcd.exe	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
File created	C:\Windows\SysWOW64\Diflambo.dll	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
File created	C:\Windows\SysWOW64\Bmenijcd.exe	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2756	2544	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 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	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bmenijcd.exe

Modifies registry class 6 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79ECA078-17FF-726B-E811-213280E5C831}\InProcServer32\ThreadingModel = "Apartment"	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79ECA078-17FF-726B-E811-213280E5C831}\InProcServer32	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79ECA078-17FF-726B-E811-213280E5C831}	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{79ECA078-17FF-726B-E811-213280E5C831}\InProcServer32\ = "C:\\Windows\\SysWow64\\Diflambo.dll"	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2544	1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe	30
PID 1720 wrote to memory of 2544	1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe	30
PID 1720 wrote to memory of 2544	1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe	30
PID 1720 wrote to memory of 2544	1720	8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe	30
PID 2544 wrote to memory of 2756	2544	Bmenijcd.exe	31
PID 2544 wrote to memory of 2756	2544	Bmenijcd.exe	31
PID 2544 wrote to memory of 2756	2544	Bmenijcd.exe	31
PID 2544 wrote to memory of 2756	2544	Bmenijcd.exe	31

C:\Users\Admin\AppData\Local\Temp\8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
"C:\Users\Admin\AppData\Local\Temp\8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Windows\SysWOW64\Bmenijcd.exe
  C:\Windows\system32\Bmenijcd.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2544 -s 140
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2756

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

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Downloads

C:\Windows\SysWOW64\Bmenijcd.exe

Filesize
661KB

MD5
ecb3cfcd87b298a93fea7ac323b233de

SHA1
e74080af5d79f914fa0ba92b5714f7e7e2a4c5e1

SHA256
2985a861eab5264761bf8915cc96432aaeafcb408aeec51e43d11c07c6b1aadd

SHA512
1d3e1f265648014a56f673534322c88089eba095f18a8ff2d4be1cadc3cb2abe8d84e0317da6ebf8b78f372dbb19bd0e71283b2b375a6033797ccec506aeb9be

Download Submit
memory/1720-0-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/1720-12-0x00000000002D0000-0x0000000000305000-memory.dmp

Filesize
212KB

Download
memory/1720-13-0x00000000002D0000-0x0000000000305000-memory.dmp

Filesize
212KB

Download
memory/1720-19-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download
memory/2544-14-0x0000000000400000-0x0000000000435000-memory.dmp

Filesize
212KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads