c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1

General

Target

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Size

78KB
MD5

3442680129804748735cf7b582a0575c
SHA1

0b00abc15b68b42c421da3a4c8fdf86ed322f846
SHA256

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1
SHA512

47592328e29f77841502c01c0c2dd5d4a79abc919f7227530778f07df712c060e703f6e1b6c13ae326d6b0a1ce630b1d59bb7e94c871cf0fd89820defe728785
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOVkdvz5S:GhfxHNIreQm+HiYkdvz5S

Score

7^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

rundll32.exe

pid process

2940 rundll32.exe

pid	process
2940	rundll32.exe

Loads dropped DLL 2 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

pid	process
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

Modifies system executable filetype association 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.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

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

description	ioc	process
File created	C:\Windows\SysWOW64\notepad¢¬.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
File opened for modification	C:\Windows\SysWOW64\¢«.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
File created	C:\Windows\SysWOW64\¢«.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

Drops file in Windows directory 2 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

description	ioc	process
File opened for modification	C:\Windows\system\rundll32.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
File created	C:\Windows\system\rundll32.exe	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

Modifies registry class 15 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exerundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.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\MSipv	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1716413071"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1716413071"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

pid	process
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

rundll32.exe

pid process

2940 rundll32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exerundll32.exe

pid process

2216 c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
2940 rundll32.exe
2940 rundll32.exe

pid	process
2940	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe

description	pid	process	target process
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe
PID 2216 wrote to memory of 2940	2216	c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.exe
"C:\Users\Admin\AppData\Local\Temp\c91be62d3b66f0329eb8c4cf0a3834f8d1bf43a89c926ce777d93d4dd0adeda1.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:2216
- 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:2940

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

Replay Monitor

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Downloads

C:\Windows\SysWOW64\notepad¢¬.exe

Filesize
80KB

MD5
af5dc5a1b1ceb5a97d4c7fc57fbec0b4

SHA1
911a159be600da61ad6875fe943c7486f6980cfd

SHA256
4acea1b8f927240b86aeca343076bdd9158b2948d3ca16333861b5d57d3ad469

SHA512
d6e42a48a539bac4d933711ca1943d1fd9d13c103bcdd688daf6b375bbfcefbbea912e46d9acfe05ea1314657fbcef07fe9796e9df3c5d0bd166d8bf133f2c85

Download Submit
\Windows\system\rundll32.exe

Filesize
73KB

MD5
085e6b00a2212149dc24068eeef9bca1

SHA1
77f51fde78804bf3c877db97270b8e2ec7c4ee38

SHA256
1bac0b06d24df3f3ec3969263dcbb65a0c3f552f5021cc2588f9877b4659311d

SHA512
d26e3f10c2c5ca23614841e0492ead29978c38ba896c60c7ab803d53c1f5f9ffc6d7d48eeede6aa3d85532debbcc76e1dfcff287ae956e9a99df49a5836c8acf

Download Submit
memory/2216-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2216-12-0x00000000002D0000-0x00000000002E6000-memory.dmp

Filesize
88KB

Download
memory/2216-18-0x00000000002D0000-0x00000000002E6000-memory.dmp

Filesize
88KB

Download
memory/2216-22-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2216-21-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2940-19-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads