b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12

General

Target

b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Size

79KB
MD5

aa79b961c8f56e662e65c6de592875f3
SHA1

8fce3c94ae4a8b28ca397d32d5875dec1164400f
SHA256

b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12
SHA512

ec3694ee720f57fab01215d83e4c7dd08497d0b11457e5749db70f387cfd06456b8eafbcaa80c5616a4aeeda3f05e53b0f0b9f43b53bbc56f3d737a3677348fc
SSDEEP

1536:RshfSWHHNvoLqNwDDGw02eQmh0HjWOJqBPX:GhfxHNIreQm+Hi2qBPX

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2548	rundll32.exe

Loads dropped DLL 2 IoCs

pid	Process
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.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	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.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 created	C:\Windows\SysWOW64\notepad¢¬.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
File opened for modification	C:\Windows\SysWOW64\¢«.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
File created	C:\Windows\SysWOW64\¢«.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
File opened for modification	C:\Windows\SysWOW64\notepad¢¬.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system\rundll32.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
File created	C:\Windows\system\rundll32.exe	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe

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	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1726037905"	rundll32.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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\MSipv	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1726037905"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506"	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command	rundll32.exe
Key created	\REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*"	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2548	rundll32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
2548	rundll32.exe
2548	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30
PID 2908 wrote to memory of 2548	2908	b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe	30

C:\Users\Admin\AppData\Local\Temp\b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe
"C:\Users\Admin\AppData\Local\Temp\b79cb1a813c3d8d88a65df33560e653420c8d7534c56e719eb3cd5a598a0da12.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Windows\system\rundll32.exe
  C:\Windows\system\rundll32.exe
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:2548

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

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\notepad¢¬.exe

Filesize
79KB

MD5
6604fc375c188354d802b45c3292394d

SHA1
570412df10f4a807385c46481576434ea8e08139

SHA256
b126a69b63bdbd2481a063df94e654c7bb67a88881685a342548f6497827c7ef

SHA512
6665f0cf97f2cfec7f856c3c3b5de49d4a04e2d007cf3a2278dc853fec0d37bd9a9dc538823facf7af7a14c2655c799c683502a1b8390c475284d501ca80be5d

Download Submit
\Windows\system\rundll32.exe

Filesize
83KB

MD5
098d1fd7ae5b34d1e160b4d83029b08b

SHA1
a4f029f7a07ce8671e4ff4e3f7079047dc16a162

SHA256
9b43d20c51c88031bb10d9f1ac1e77ea247ce712a24b251ab019f67d6eb0bd4c

SHA512
627749501a138d044baf7d867d25f95497e3b7d85e56e470bab01f60c4d51b51d188a63e0560515fbb5f083c543e89e5dc1977c125959258113352e489e26664

Download Submit
memory/2548-21-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2908-0-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download
memory/2908-12-0x0000000000280000-0x0000000000296000-memory.dmp

Filesize
88KB

Download
memory/2908-17-0x0000000000280000-0x0000000000296000-memory.dmp

Filesize
88KB

Download
memory/2908-20-0x0000000000400000-0x0000000000415A00-memory.dmp

Filesize
86KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads