236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271

General

Target

236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe
Size

428KB
MD5

84b74a14df7bd48f2ee9a1efa80c3f1b
SHA1

8642b91cc1d11988d999c1aaadf23c215f4ba543
SHA256

236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271
SHA512

7c42368608aca20a0541bf0fb22e13e09dab12d5dc0d3eb7c9b824c75f2afceec3f14db669768aea4019d17ce8f1c1e805c603b7ed456a10877e79324ae174fa
SSDEEP

3072:nQC+GXgmYA/npAwfkBEcBoUTqp8YVE83jy11BGWjyLmar5FCO3ztKSwni9JCa2i:nQqgmYA/npALBBo4q2YXAyL1L3BYq

Score

9^/10

bootkit persistence spyware stealer upx

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1080-15-0x0000000010000000-0x000000001004E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1080-17-0x0000000010000000-0x000000001004E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/1080-19-0x0000000010000000-0x000000001004E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

UPX dump on OEP (original entry point) 6 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4944-10-0x0000000000400000-0x0000000000469000-memory.dmp	UPX
C:\Program Files\cfhqz\ynaodk.dll	UPX
behavioral2/memory/1080-14-0x0000000010000000-0x000000001004E000-memory.dmp	UPX
behavioral2/memory/1080-15-0x0000000010000000-0x000000001004E000-memory.dmp	UPX
behavioral2/memory/1080-17-0x0000000010000000-0x000000001004E000-memory.dmp	UPX
behavioral2/memory/1080-19-0x0000000010000000-0x000000001004E000-memory.dmp	UPX

Deletes itself 1 IoCs

Processes:

yfqwbf.exe

pid process

4944 yfqwbf.exe
Executes dropped EXE 2 IoCs

Processes:

yfqwbf.exeynaodk.exe

pid process

4944 yfqwbf.exe
1080 ynaodk.exe
Loads dropped DLL 1 IoCs

Processes:

ynaodk.exe

pid process

1080 ynaodk.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

pid	process
4944	yfqwbf.exe

pid	process
4944	yfqwbf.exe
1080	ynaodk.exe

pid	process
1080	ynaodk.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4204-0-0x0000000000400000-0x0000000000469000-memory.dmp	upx
behavioral2/memory/4204-2-0x0000000000400000-0x0000000000469000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\yfqwbf.exe	upx
behavioral2/memory/4944-10-0x0000000000400000-0x0000000000469000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

ynaodk.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\cfhqz\\ynaodk.exe \"c:\\Program Files\\cfhqz\\ynaodk.dll\",Compliance"	ynaodk.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

ynaodk.exe

description	ioc	process
File opened (read-only)	\??\a:	ynaodk.exe
File opened (read-only)	\??\l:	ynaodk.exe
File opened (read-only)	\??\p:	ynaodk.exe
File opened (read-only)	\??\s:	ynaodk.exe
File opened (read-only)	\??\v:	ynaodk.exe
File opened (read-only)	\??\e:	ynaodk.exe
File opened (read-only)	\??\h:	ynaodk.exe
File opened (read-only)	\??\u:	ynaodk.exe
File opened (read-only)	\??\w:	ynaodk.exe
File opened (read-only)	\??\y:	ynaodk.exe
File opened (read-only)	\??\z:	ynaodk.exe
File opened (read-only)	\??\g:	ynaodk.exe
File opened (read-only)	\??\j:	ynaodk.exe
File opened (read-only)	\??\m:	ynaodk.exe
File opened (read-only)	\??\o:	ynaodk.exe
File opened (read-only)	\??\q:	ynaodk.exe
File opened (read-only)	\??\r:	ynaodk.exe
File opened (read-only)	\??\b:	ynaodk.exe
File opened (read-only)	\??\i:	ynaodk.exe
File opened (read-only)	\??\k:	ynaodk.exe
File opened (read-only)	\??\n:	ynaodk.exe
File opened (read-only)	\??\t:	ynaodk.exe
File opened (read-only)	\??\x:	ynaodk.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

ynaodk.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 ynaodk.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	ynaodk.exe

Drops file in Program Files directory 4 IoCs

Processes:

yfqwbf.exe

description	ioc	process
File created	\??\c:\Program Files\cfhqz\ynaodk.dll	yfqwbf.exe
File created	\??\c:\Program Files\cfhqz\ynaodk.exe	yfqwbf.exe
File opened for modification	\??\c:\Program Files\cfhqz\ynaodk.exe	yfqwbf.exe
File opened for modification	\??\c:\Program Files\cfhqz	yfqwbf.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ynaodk.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ynaodk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ynaodk.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2584 PING.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

ynaodk.exe

pid process

1080 ynaodk.exe
1080 ynaodk.exe
1080 ynaodk.exe
1080 ynaodk.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ynaodk.exe

description pid process

Token: SeDebugPrivilege 1080 ynaodk.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exeyfqwbf.exe

pid process

4204 236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe
4944 yfqwbf.exe

pid	process
2584	PING.EXE

pid	process
1080	ynaodk.exe
1080	ynaodk.exe
1080	ynaodk.exe
1080	ynaodk.exe

description	pid	process
Token: SeDebugPrivilege	1080	ynaodk.exe

pid	process
4204	236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe
4944	yfqwbf.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.execmd.exeyfqwbf.exe

description	pid	process	target process
PID 4204 wrote to memory of 1912	4204	236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe	cmd.exe
PID 4204 wrote to memory of 1912	4204	236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe	cmd.exe
PID 4204 wrote to memory of 1912	4204	236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe	cmd.exe
PID 1912 wrote to memory of 2584	1912	cmd.exe	PING.EXE
PID 1912 wrote to memory of 2584	1912	cmd.exe	PING.EXE
PID 1912 wrote to memory of 2584	1912	cmd.exe	PING.EXE
PID 1912 wrote to memory of 4944	1912	cmd.exe	yfqwbf.exe
PID 1912 wrote to memory of 4944	1912	cmd.exe	yfqwbf.exe
PID 1912 wrote to memory of 4944	1912	cmd.exe	yfqwbf.exe
PID 4944 wrote to memory of 1080	4944	yfqwbf.exe	ynaodk.exe
PID 4944 wrote to memory of 1080	4944	yfqwbf.exe	ynaodk.exe
PID 4944 wrote to memory of 1080	4944	yfqwbf.exe	ynaodk.exe

C:\Users\Admin\AppData\Local\Temp\236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe
"C:\Users\Admin\AppData\Local\Temp\236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4204

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yfqwbf.exe "C:\Users\Admin\AppData\Local\Temp\236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1912

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:2584

C:\Users\Admin\AppData\Local\Temp\yfqwbf.exe
C:\Users\Admin\AppData\Local\Temp\\yfqwbf.exe "C:\Users\Admin\AppData\Local\Temp\236e2cbb0cd80dda7760f6c855424a8adbb5e98a348da259e22f04cd4a1f2271.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4944

\??\c:\Program Files\cfhqz\ynaodk.exe
"c:\Program Files\cfhqz\ynaodk.exe" "c:\Program Files\cfhqz\ynaodk.dll",Compliance C:\Users\Admin\AppData\Local\Temp\yfqwbf.exe
4⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1080

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Program Files\cfhqz\ynaodk.dll
Filesize
141KB

MD5
b2b949fc665bc718528726ee21256ed8

SHA1
34f43c23df40ade63b8d1d1abc9fc09971036700

SHA256
054dd7bfecf4d1a807bd282bdd79746a055a2841a48b52415dd7ae43a3ac71af

SHA512
181550bcc1b0fc711bf179eeb18cc6e0c6dea981eeb5afb17ae544b05883e54891843cf48d5b46f944eb0e5b486dbef9a10bd7e4758f346bc8a2e5e459ffc0bb

Download Submit
C:\Program Files\cfhqz\ynaodk.exe
Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Users\Admin\AppData\Local\Temp\yfqwbf.exe
Filesize
428KB

MD5
c79ef0480332876dc12295c604697535

SHA1
99553ee8a9e1f40507adc9e658c50dcb24a2f2d0

SHA256
106378ed42c19fa867a346d3abddf5f640f887b75a4a6f0be91bb2bb13e2ae0b

SHA512
d42489c124b3b044b4095720d6a22022c4127dd61a60465020ee07ce76b5a931b5f6778825ebc125b96b3b0fa47b09442ffda35a88fbb9e3aa4b3abbd37f91a2

Download Submit
memory/1080-14-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/1080-15-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/1080-17-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/1080-19-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/4204-0-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4204-2-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download
memory/4944-10-0x0000000000400000-0x0000000000469000-memory.dmp

Filesize
420KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads