masslogger | 320592aa53514c7fd425f4c691e4be802ca964955d5a6fdd960a8725c36737b4

General

Target
70A12162020.doc
Size 526KB
Sample201217-fnbxtatd6s
SHA256 320592aa53514c7fd425f4c691e4be802ca964955d5a6fdd960a8725c36737b4
MD5 ed75e6e71d66d381295826453ae631e0
SHA1 b7c29ebe55ac21e5893cdb332b72761ed6441cd9
SHA512 07f69b17d5c75db4f4151712648b5d2cae0849f0593f8cac5a22548f4eda64455c0847f2e424b5f05faa3f69b96cdd861087919c4eafc0a764b63cff3eef9682
MD5 SHA1 SHA512

Score

10^/10

masslogger spyware stealer

Malware Config

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1684-14-0x000000000048162E-mapping.dmp	family_masslogger
behavioral1/memory/1684-13-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/1684-16-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/1684-17-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	1632	EQNEDT32.EXE

Executes dropped EXE 2 IoCs

pid	Process
1096	VOD.exe
1684	VOD.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Control Panel\International\Geo\Nation	VOD.exe

Loads dropped DLL 2 IoCs

pid	Process
1632	EQNEDT32.EXE
1632	EQNEDT32.EXE

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

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
11	api.ipify.org

Suspicious use of NtSetInformationThreadHideFromDebugger 12 IoCs

pid	Process
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1096 set thread context of 1684	1096	VOD.exe	36

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Office loads VBA resources, possible macro or embedded object present

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
328	timeout.exe

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
1632	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2012	WINWORD.EXE
1684	VOD.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1096	VOD.exe
1096	VOD.exe
1096	VOD.exe
1684	VOD.exe
1684	VOD.exe
1684	VOD.exe
1684	VOD.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	VOD.exe
Token: SeDebugPrivilege	1684	VOD.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2012	WINWORD.EXE
2012	WINWORD.EXE
1684	VOD.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1632 wrote to memory of 1096	1632	EQNEDT32.EXE	30
PID 1632 wrote to memory of 1096	1632	EQNEDT32.EXE	30
PID 1632 wrote to memory of 1096	1632	EQNEDT32.EXE	30
PID 1632 wrote to memory of 1096	1632	EQNEDT32.EXE	30
PID 1096 wrote to memory of 1936	1096	VOD.exe	33
PID 1096 wrote to memory of 1936	1096	VOD.exe	33
PID 1096 wrote to memory of 1936	1096	VOD.exe	33
PID 1096 wrote to memory of 1936	1096	VOD.exe	33
PID 1936 wrote to memory of 328	1936	cmd.exe	35
PID 1936 wrote to memory of 328	1936	cmd.exe	35
PID 1936 wrote to memory of 328	1936	cmd.exe	35
PID 1936 wrote to memory of 328	1936	cmd.exe	35
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36
PID 1096 wrote to memory of 1684	1096	VOD.exe	36

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\70A12162020.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2012

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1632
- C:\Users\Admin\AppData\Roaming\VOD.exe
  "C:\Users\Admin\AppData\Roaming\VOD.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout 4.104
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 4.104
      4⤵
      Delays execution with timeout.exe
      PID:328
- - C:\Users\Admin\AppData\Roaming\VOD.exe
    "C:\Users\Admin\AppData\Roaming\VOD.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1684