1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead

General

Target

1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
Size

83KB
MD5

45af3ee5c1252a150d1652574d6da322
SHA1

d28c518df33624496514f7ecdc16ffdf7ee19a26
SHA256

1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead
SHA512

e3554bddd6cccfd695583785356548dad0679efea9ded6a6f6eec481a378c4f9eb93ce50cb77bb0eeb53f8e76a5daed9eb7ba40d60a1de4614bbb62ef5461430

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 1 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

klass.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Program Files (x86)\Common Files\System\klass.exe = "C:\\Program Files (x86)\\Common Files\\System\\klass.exe:*:Enabled:Windows Update"	klass.exe

Executes dropped EXE 1 IoCs

Processes:

klass.exe

pid process

932 klass.exe

pid	process
932	klass.exe

Loads dropped DLL 2 IoCs

Processes:

1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe

pid	process
1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

klass.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Program Files (x86)\\Common Files\\System\\klass.exe"	klass.exe

Drops file in Program Files directory 6 IoCs

Processes:

klass.exe1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\System\klass.exe	klass.exe
File opened for modification	C:\Program Files (x86)\Common Files\System	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
File created	C:\Program Files (x86)\Common Files\System\klass.exe	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\klass.exe	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
File opened for modification	C:\Program Files (x86)\Common Files\System	klass.exe
File created	C:\Program Files (x86)\Common Files\System\klass.exe	klass.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe

description	pid	process	target process
PID 1740 wrote to memory of 932	1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe	klass.exe
PID 1740 wrote to memory of 932	1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe	klass.exe
PID 1740 wrote to memory of 932	1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe	klass.exe
PID 1740 wrote to memory of 932	1740	1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe	klass.exe

C:\Users\Admin\AppData\Local\Temp\1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe
"C:\Users\Admin\AppData\Local\Temp\1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Program Files (x86)\Common Files\System\klass.exe
  "C:\Program Files (x86)\Common Files\System\klass.exe"
  2⤵
  - Modifies firewall policy service
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Program Files directory
  PID:932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files (x86)\Common Files\System\klass.exe

Filesize
83KB

MD5
45af3ee5c1252a150d1652574d6da322

SHA1
d28c518df33624496514f7ecdc16ffdf7ee19a26

SHA256
1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead

SHA512
e3554bddd6cccfd695583785356548dad0679efea9ded6a6f6eec481a378c4f9eb93ce50cb77bb0eeb53f8e76a5daed9eb7ba40d60a1de4614bbb62ef5461430

Download Submit
C:\Program Files (x86)\Common Files\System\klass.exe

Filesize
83KB

MD5
45af3ee5c1252a150d1652574d6da322

SHA1
d28c518df33624496514f7ecdc16ffdf7ee19a26

SHA256
1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead

SHA512
e3554bddd6cccfd695583785356548dad0679efea9ded6a6f6eec481a378c4f9eb93ce50cb77bb0eeb53f8e76a5daed9eb7ba40d60a1de4614bbb62ef5461430

Download Submit
\Program Files (x86)\Common Files\System\klass.exe

Filesize
83KB

MD5
45af3ee5c1252a150d1652574d6da322

SHA1
d28c518df33624496514f7ecdc16ffdf7ee19a26

SHA256
1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead

SHA512
e3554bddd6cccfd695583785356548dad0679efea9ded6a6f6eec481a378c4f9eb93ce50cb77bb0eeb53f8e76a5daed9eb7ba40d60a1de4614bbb62ef5461430

Download Submit
\Program Files (x86)\Common Files\System\klass.exe

Filesize
83KB

MD5
45af3ee5c1252a150d1652574d6da322

SHA1
d28c518df33624496514f7ecdc16ffdf7ee19a26

SHA256
1174995b7eca1869929bbc8026d17bb60cfa8310a570bd5611908caca15deead

SHA512
e3554bddd6cccfd695583785356548dad0679efea9ded6a6f6eec481a378c4f9eb93ce50cb77bb0eeb53f8e76a5daed9eb7ba40d60a1de4614bbb62ef5461430

Download Submit
memory/932-57-0x0000000000000000-mapping.dmp

Download
memory/1740-54-0x00000000755C1000-0x00000000755C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads