073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c

General

Target

073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe
Size

404KB
MD5

a03d8f3c3f17166c154d9843df2625fe
SHA1

42c66315dcfc895e2f1a3cae1337d283c9e7b3e8
SHA256

073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c
SHA512

4f139d40e73c122eaad3b8500679ff9bcbca761da7bad16634ca68bb50ea8fbeb0c01a27c04133ed1592183a5d906f4ea9ffb733dfe780cea85cb4619ac9bd26
SSDEEP

6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH47:gtRfJcNYFNm8UhlZGse7

Score

8^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 10 IoCs

Processes:

rundll32.exe

flow	pid	process
3	2696	rundll32.exe
7	2696	rundll32.exe
8	2696	rundll32.exe
9	2696	rundll32.exe
10	2696	rundll32.exe
13	2696	rundll32.exe
14	2696	rundll32.exe
15	2696	rundll32.exe
17	2696	rundll32.exe
18	2696	rundll32.exe

Deletes itself 1 IoCs

Processes:

zymtr.exe

pid process

2548 zymtr.exe
Executes dropped EXE 1 IoCs

Processes:

zymtr.exe

pid process

2548 zymtr.exe
Loads dropped DLL 6 IoCs

Processes:

cmd.exerundll32.exe

pid process

2112 cmd.exe
2112 cmd.exe
2696 rundll32.exe
2696 rundll32.exe
2696 rundll32.exe
2696 rundll32.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
2548	zymtr.exe

pid	process
2548	zymtr.exe

pid	process
2112	cmd.exe
2112	cmd.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\fmnng\\etgydspe.dll\",Verify"	rundll32.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:

rundll32.exe

description	ioc	process
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.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:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

rundll32.exe

pid process

2696 rundll32.exe
Drops file in Program Files directory 2 IoCs

Processes:

zymtr.exe

description ioc process

File opened for modification \??\c:\Program Files\fmnng zymtr.exe
File created \??\c:\Program Files\fmnng\etgydspe.dll zymtr.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

description	ioc	process
File opened for modification	\??\c:\Program Files\fmnng	zymtr.exe
File created	\??\c:\Program Files\fmnng\etgydspe.dll	zymtr.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:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1984 PING.EXE

pid	process
1984	PING.EXE

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

rundll32.exe

pid	process
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe
2696	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 2696 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exezymtr.exe

pid process

1032 073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe
2548 zymtr.exe

description	pid	process
Token: SeDebugPrivilege	2696	rundll32.exe

pid	process
1032	073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe
2548	zymtr.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.execmd.exezymtr.exe

description	pid	process	target process
PID 1032 wrote to memory of 2112	1032	073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe	cmd.exe
PID 1032 wrote to memory of 2112	1032	073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe	cmd.exe
PID 1032 wrote to memory of 2112	1032	073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe	cmd.exe
PID 1032 wrote to memory of 2112	1032	073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe	cmd.exe
PID 2112 wrote to memory of 1984	2112	cmd.exe	PING.EXE
PID 2112 wrote to memory of 1984	2112	cmd.exe	PING.EXE
PID 2112 wrote to memory of 1984	2112	cmd.exe	PING.EXE
PID 2112 wrote to memory of 1984	2112	cmd.exe	PING.EXE
PID 2112 wrote to memory of 2548	2112	cmd.exe	zymtr.exe
PID 2112 wrote to memory of 2548	2112	cmd.exe	zymtr.exe
PID 2112 wrote to memory of 2548	2112	cmd.exe	zymtr.exe
PID 2112 wrote to memory of 2548	2112	cmd.exe	zymtr.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe
PID 2548 wrote to memory of 2696	2548	zymtr.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe
"C:\Users\Admin\AppData\Local\Temp\073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\zymtr.exe "C:\Users\Admin\AppData\Local\Temp\073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2112

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:1984

C:\Users\Admin\AppData\Local\Temp\zymtr.exe
C:\Users\Admin\AppData\Local\Temp\\zymtr.exe "C:\Users\Admin\AppData\Local\Temp\073c7f19f3f3db5edf2a6f7eb1665a189cc481a87cc0061b8fa0fb9f38bbf46c.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2548

\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\Program Files\fmnng\etgydspe.dll",Verify C:\Users\Admin\AppData\Local\Temp\zymtr.exe
4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2696

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\fmnng\etgydspe.dll
Filesize
228KB

MD5
888af4121c46847b19b439a34eef739f

SHA1
ef91a5795f24e0443f544333bb24122e5e9fb954

SHA256
9e839d72a5637e92ccf577511b683dcabddcd28f3f1c5399cbd120704e6db5e1

SHA512
529933e61344995c68977581e9058bdcf0a04396ecfc3eb0192bf872a7cc7b8effa93a417b60a56e9365e4e106073d6f6dcdd2f832252cd4be0f9e41fe4e852c

Download Submit
\Users\Admin\AppData\Local\Temp\zymtr.exe
Filesize
404KB

MD5
ce3a66d90d7cfb2ae57aa88f5e2f6263

SHA1
7f2a06027ea4c585f748ff06c76fc5a88bab0be7

SHA256
27f8b471786103e9aa022e244ecfa8cd8445d97ab5fff7ea9b5532e07660f3e3

SHA512
7abab815aa0982ab722d869a8ce216b35e94ae9e7f5f759ec3997af50b4b9e7a540dd3b5981f07fd3e8247c59281fedeeb264397efcd5110965b14950b7bd599

Download Submit
memory/1032-0-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/1032-2-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2112-7-0x0000000000350000-0x00000000003B4000-memory.dmp

Filesize
400KB

Download
memory/2112-5-0x0000000000350000-0x00000000003B4000-memory.dmp

Filesize
400KB

Download
memory/2548-11-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2548-9-0x0000000000400000-0x0000000000464000-memory.dmp

Filesize
400KB

Download
memory/2696-17-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2696-18-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2696-20-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2696-19-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download
memory/2696-22-0x0000000010000000-0x0000000010080000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads