bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77

General

Target

bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Size

80KB
MD5

e7a411aaf346e479203af604b108a19c
SHA1

e15e41af6a73a853cf0c670deafc21157b5bbd61
SHA256

bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77
SHA512

19a70067f5f3f40cfb872880e2c8bd35a398d8049782f23d61f4cdf5f6241ab16a358749fa5a12b2a6865066cb7dd8106a03aba37bee4418690e48f14d0eb57b
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOZKW:GhfxHNIreQm+HiaKW

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2168	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\¢«.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
File created	C:\Windows\SysWOW64\¢«.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
File created	C:\Windows\SysWOW64\notepad¢¬.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
File created	C:\Windows\system\rundll32.exe	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1697277390"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1697277390"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2168	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
2168	rundll32.exe
2168	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28
PID 2988 wrote to memory of 2168	2988	bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe	28

C:\Users\Admin\AppData\Local\Temp\bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe
"C:\Users\Admin\AppData\Local\Temp\bc91db279f152c6cdb0ae9fd43a4194808400a02cd09c76fb168e7133484ad77.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\system\rundll32.exe
  C:\Windows\system\rundll32.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:2168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\notepad¢¬.exe

Filesize
79KB

MD5
e295b4110f35a61394aec6e346b40f97

SHA1
e0753dfc2464d13db60bea4d85a7a32cb8fc5716

SHA256
b04224408abe2044e06c52e383bff4951a654117d5517f7010c88c36d44e97e1

SHA512
9212b236edafeebc63c773289d6871d84c125945433cb0aa48a107824b2937b22303e72bb98afb9e52102b6dfd0c7845dbdabbd97dbc9357664cdb05653294ef

Download Submit
C:\Windows\system\rundll32.exe

Filesize
81KB

MD5
42e6f88cd5ecb0d2628f6ab6538c92fd

SHA1
e0e65a8cdd0d964851b3f32e6a63a4c0086e7ca4

SHA256
8c7f6ad23fa38d82944bd5803fc642968649474dda61295d18e9402b51b933fb

SHA512
6de29023da61d3f0ae644abbc5c70a180e2439151c2110d18f6592591b45b75156cfb06d53a034ed64422bf2fda47bfdae1de1cf28c2d7b045764d05d0c1b7b9

Download Submit
C:\Windows\system\rundll32.exe

Filesize
81KB

MD5
42e6f88cd5ecb0d2628f6ab6538c92fd

SHA1
e0e65a8cdd0d964851b3f32e6a63a4c0086e7ca4

SHA256
8c7f6ad23fa38d82944bd5803fc642968649474dda61295d18e9402b51b933fb

SHA512
6de29023da61d3f0ae644abbc5c70a180e2439151c2110d18f6592591b45b75156cfb06d53a034ed64422bf2fda47bfdae1de1cf28c2d7b045764d05d0c1b7b9

Download Submit
\Windows\system\rundll32.exe

Filesize
81KB

MD5
42e6f88cd5ecb0d2628f6ab6538c92fd

SHA1
e0e65a8cdd0d964851b3f32e6a63a4c0086e7ca4

SHA256
8c7f6ad23fa38d82944bd5803fc642968649474dda61295d18e9402b51b933fb

SHA512
6de29023da61d3f0ae644abbc5c70a180e2439151c2110d18f6592591b45b75156cfb06d53a034ed64422bf2fda47bfdae1de1cf28c2d7b045764d05d0c1b7b9

Download Submit
\Windows\system\rundll32.exe

Filesize
81KB

MD5
42e6f88cd5ecb0d2628f6ab6538c92fd

SHA1
e0e65a8cdd0d964851b3f32e6a63a4c0086e7ca4

SHA256
8c7f6ad23fa38d82944bd5803fc642968649474dda61295d18e9402b51b933fb

SHA512
6de29023da61d3f0ae644abbc5c70a180e2439151c2110d18f6592591b45b75156cfb06d53a034ed64422bf2fda47bfdae1de1cf28c2d7b045764d05d0c1b7b9

Download Submit
memory/2168-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2168-23-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2988-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2988-11-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/2988-17-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/2988-21-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2988-22-0x0000000000240000-0x0000000000246000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads