0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

General

Target

0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
Size

80KB
MD5

c8b1902dc6c5019d06fdf5b6c73b22a5
SHA1

99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d
SHA256

0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7
SHA512

803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201
SSDEEP

1536:+QqnkSQsN1Tgc0uWzUAm9vxlEofE2Ut8KRE9o:+QpSQZcqovxxlTW8KRE9o

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
584	audiohd.exe
1356	WUAuthHost.exe

Loads dropped DLL 2 IoCs

pid	Process
956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Audio HDi Driver = "\"C:\\Windows\\system32\\audiohd.exe\""	audiohd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Audio HDi Driver = "\"C:\\Windows\\system32\\audiohd.exe\""	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\audiohd.exe	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
File opened for modification	C:\Windows\SysWOW64\audiohd.exe	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\WUAuthHost.exe	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
File opened for modification	C:\Program Files (x86)\Common Files\WUAuthHost.exe	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 6 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	audiohd.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	audiohd.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	WUAuthHost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	WUAuthHost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
Token: SeDebugPrivilege	584	audiohd.exe
Token: 33	584	audiohd.exe
Token: SeIncBasePriorityPrivilege	584	audiohd.exe
Token: SeDebugPrivilege	1356	WUAuthHost.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 956 wrote to memory of 584	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	29
PID 956 wrote to memory of 584	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	29
PID 956 wrote to memory of 584	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	29
PID 956 wrote to memory of 584	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	29
PID 956 wrote to memory of 1356	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	30
PID 956 wrote to memory of 1356	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	30
PID 956 wrote to memory of 1356	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	30
PID 956 wrote to memory of 1356	956	0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe	30

C:\Users\Admin\AppData\Local\Temp\0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe
"C:\Users\Admin\AppData\Local\Temp\0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:956
- C:\Windows\SysWOW64\audiohd.exe
  "C:\Windows\system32\audiohd.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks processor information in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:584
- C:\Program Files (x86)\Common Files\WUAuthHost.exe
  "C:\Program Files (x86)\Common Files\WUAuthHost.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:1356

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Common Files\WUAuthHost.exe

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

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

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

Download Submit
C:\Windows\SysWOW64\audiohd.exe

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

Download Submit
C:\Windows\SysWOW64\audiohd.exe

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

Download Submit
\Program Files (x86)\Common Files\WUAuthHost.exe

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

Download Submit
\Windows\SysWOW64\audiohd.exe

Filesize
80KB

MD5
c8b1902dc6c5019d06fdf5b6c73b22a5

SHA1
99c36c23cdf55a8bdb846a4b9334d06bcf2cea4d

SHA256
0a1bbeaad97c7a611fbfe35e2d45d617b2b4e924a966d62568809b7e8f5724b7

SHA512
803d9f0dfb1ad95b6fcb6a446de2c214f86b221a9d57c743772b9584e0ace698a9bcd51ca425c4efe51532847832641aa6e511b57b3aa65a21dfcc10cabe5201

Download Submit
memory/584-61-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/584-69-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/956-54-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/956-60-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/956-67-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download
memory/1356-68-0x0000000074770000-0x0000000074D1B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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