6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138

Analysis

max time kernel
171s
max time network
75s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/10/2022, 07:30

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General

Target

6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Size

36KB
MD5

5b821c8266e4092ae9a1e447fcf3820c
SHA1

d5bf94666d736f4fda4c5cbd335290b1b4d7c135
SHA256

6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138
SHA512

730ad91b6af73ff7ccef24521091fae77e87a3d5899ef3f11f7e6894bf69ee34e39d7d23716471a8f65078bb164c10db09acf889603a57e7b60885603add5855
SSDEEP

768:DXym2RHT6BiHjWQR8SX8MZ0ExZqj+dqTht:Tj2IBw5F0Jt

Score

8^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
848	BHOCALL.EXE

Modifies Installed Components in the registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{A47BE134-9ACE-2457-ABD0-3AE14579BDE1}	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{A47BE134-9ACE-2457-ABD0-3AE14579BDE1}\StubPath = "C:\\Windows\\system32\\BHOCALL.EXE"	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2020-55-0x0000000000400000-0x000000000040A000-memory.dmp	upx
behavioral1/files/0x000c0000000054a8-57.dat	upx
behavioral1/files/0x000c0000000054a8-58.dat	upx
behavioral1/files/0x000c0000000054a8-59.dat	upx
behavioral1/files/0x000c0000000054a8-61.dat	upx

Deletes itself 1 IoCs

pid	Process
1360	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1360	cmd.exe
1360	cmd.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\BHOCALL.EXE	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
File created	C:\Windows\SysWOW64\BHOCALL.EXE	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 20 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.tmp	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file\shell\Read	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage	BHOCALL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	BHOCALL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell	BHOCALL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}	BHOCALL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\.tmp\ = "tmp_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file\shell\Read\command	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command	BHOCALL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file\shell	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_Classes\Local Settings	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000_CLASSES\tmp_auto_file\	rundll32.exe

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
952	PING.EXE
932	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
Token: SeDebugPrivilege	848	BHOCALL.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1064	AcroRd32.exe
1064	AcroRd32.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 1360	2020	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe	28
PID 2020 wrote to memory of 1360	2020	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe	28
PID 2020 wrote to memory of 1360	2020	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe	28
PID 2020 wrote to memory of 1360	2020	6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe	28
PID 1360 wrote to memory of 952	1360	cmd.exe	30
PID 1360 wrote to memory of 952	1360	cmd.exe	30
PID 1360 wrote to memory of 952	1360	cmd.exe	30
PID 1360 wrote to memory of 952	1360	cmd.exe	30
PID 1360 wrote to memory of 848	1360	cmd.exe	31
PID 1360 wrote to memory of 848	1360	cmd.exe	31
PID 1360 wrote to memory of 848	1360	cmd.exe	31
PID 1360 wrote to memory of 848	1360	cmd.exe	31
PID 848 wrote to memory of 1660	848	BHOCALL.EXE	34
PID 848 wrote to memory of 1660	848	BHOCALL.EXE	34
PID 848 wrote to memory of 1660	848	BHOCALL.EXE	34
PID 848 wrote to memory of 1660	848	BHOCALL.EXE	34
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 1252	1660	cmd.exe	36
PID 1660 wrote to memory of 932	1660	cmd.exe	37
PID 1660 wrote to memory of 932	1660	cmd.exe	37
PID 1660 wrote to memory of 932	1660	cmd.exe	37
PID 1660 wrote to memory of 932	1660	cmd.exe	37
PID 1252 wrote to memory of 1064	1252	rundll32.exe	38
PID 1252 wrote to memory of 1064	1252	rundll32.exe	38
PID 1252 wrote to memory of 1064	1252	rundll32.exe	38
PID 1252 wrote to memory of 1064	1252	rundll32.exe	38

C:\Users\Admin\AppData\Local\Temp\6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe
"C:\Users\Admin\AppData\Local\Temp\6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe"
1⤵
- Modifies Installed Components in the registry
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ping 127.0.0.1 -n 3 &del 6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138.exe &start BHOCALL.EXE
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1360
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 3
    3⤵
    - Runs ping.exe
    PID:952
- - C:\Windows\SysWOW64\BHOCALL.EXE
    BHOCALL.EXE
    3⤵
    - Executes dropped EXE
    - Modifies registry class
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:848
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c if exist C:\Users\Admin\AppData\Local\Temp\\~7ABC.tmp start C:\Users\Admin\AppData\Local\Temp\\~7ABC.tmp&ping 127.0.0.1 -n 20&if exist C:\Users\Admin\AppData\Local\Temp\\~7ABC.tmp del C:\Users\Admin\AppData\Local\Temp\\~7ABC.tmp
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1660
    - - C:\Windows\SysWOW64\rundll32.exe
        
        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\~7ABC.tmp
        5⤵
        Modifies registry class
        Suspicious use of WriteProcessMemory
        
        PID:1252
      - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
        
        "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\~7ABC.tmp"
        6⤵
        Suspicious use of SetWindowsHookEx
        
        PID:1064
    - - C:\Windows\SysWOW64\PING.EXE
        
        ping 127.0.0.1 -n 20
        5⤵
        Runs ping.exe
        
        PID:932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\BHOCALL.EXE

Filesize
36KB

MD5
5b821c8266e4092ae9a1e447fcf3820c

SHA1
d5bf94666d736f4fda4c5cbd335290b1b4d7c135

SHA256
6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138

SHA512
730ad91b6af73ff7ccef24521091fae77e87a3d5899ef3f11f7e6894bf69ee34e39d7d23716471a8f65078bb164c10db09acf889603a57e7b60885603add5855

Download Submit
C:\Windows\SysWOW64\BHOCALL.EXE

Filesize
36KB

MD5
5b821c8266e4092ae9a1e447fcf3820c

SHA1
d5bf94666d736f4fda4c5cbd335290b1b4d7c135

SHA256
6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138

SHA512
730ad91b6af73ff7ccef24521091fae77e87a3d5899ef3f11f7e6894bf69ee34e39d7d23716471a8f65078bb164c10db09acf889603a57e7b60885603add5855

Download Submit
\Windows\SysWOW64\BHOCALL.EXE

Filesize
36KB

MD5
5b821c8266e4092ae9a1e447fcf3820c

SHA1
d5bf94666d736f4fda4c5cbd335290b1b4d7c135

SHA256
6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138

SHA512
730ad91b6af73ff7ccef24521091fae77e87a3d5899ef3f11f7e6894bf69ee34e39d7d23716471a8f65078bb164c10db09acf889603a57e7b60885603add5855

Download Submit
\Windows\SysWOW64\BHOCALL.EXE

Filesize
36KB

MD5
5b821c8266e4092ae9a1e447fcf3820c

SHA1
d5bf94666d736f4fda4c5cbd335290b1b4d7c135

SHA256
6ab686dcf22216be050dd449e582d0210b83bb973f3cf7a9fac6b183bb631138

SHA512
730ad91b6af73ff7ccef24521091fae77e87a3d5899ef3f11f7e6894bf69ee34e39d7d23716471a8f65078bb164c10db09acf889603a57e7b60885603add5855

Download Submit
memory/848-62-0x00000000751A1000-0x00000000751A3000-memory.dmp

Filesize
8KB

Download
memory/2020-55-0x0000000000400000-0x000000000040A000-memory.dmp

Filesize
40KB

Download