2ac13e163b9bdd76aa1dd7ebcfc2dd9ddc6a32712c328889495637a5d0d2a5ea

Analysis

max time kernel
148s
max time network
135s
platform
windows7_x64
resource
win7v20201028
submitted
14-01-2021 06:22

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General

Target

IMG-0641.doc
Size

598KB
MD5

44c09f25925b3a659e19dae6b5e70cc5
SHA1

4eb7ae147669bdb3cc508efc1160fd820e662fa9
SHA256

2ac13e163b9bdd76aa1dd7ebcfc2dd9ddc6a32712c328889495637a5d0d2a5ea
SHA512

d9bdabf18d25ea6ac434c63062c8119ecc2c52fc76b4c31ccc5079f7c4ffd7472a43574aa614ed15bafd7655011221f79dba1657dcba81e8fd86f30c979c2579

Score

10^/10

persistence spyware

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\dhfn.exe,"	reg.exe

Blocklisted process makes network request 2 IoCs

Processes:

EQNEDT32.EXE

flow pid process

8 1776 EQNEDT32.EXE
10 1776 EQNEDT32.EXE
Executes dropped EXE 3 IoCs

Processes:

69577.exedhfn.exeInstallUtil.exe

pid process

528 69577.exe
1776 dhfn.exe
1688 InstallUtil.exe
Loads dropped DLL 3 IoCs

Processes:

EQNEDT32.EXE69577.exedhfn.exe

pid process

1776 EQNEDT32.EXE
528 69577.exe
1776 dhfn.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
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 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

11 checkip.dyndns.org
14 freegeoip.app
15 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

dhfn.exe

description pid process target process

PID 1776 set thread context of 1688 1776 dhfn.exe InstallUtil.exe
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

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
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

Processes:

EQNEDT32.EXE

pid process

1776 EQNEDT32.EXE

flow	pid	process
8	1776	EQNEDT32.EXE
10	1776	EQNEDT32.EXE

pid	process
1776	EQNEDT32.EXE
528	69577.exe
1776	dhfn.exe

flow	ioc
11	checkip.dyndns.org
14	freegeoip.app
15	freegeoip.app

description	pid	process	target process
PID 1776 set thread context of 1688	1776	dhfn.exe	InstallUtil.exe

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

pid	process
1776	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

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 (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
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\MenuExt\E&xport to Microsoft Excel	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
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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

2024 WINWORD.EXE

pid	process
2024	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

69577.exedhfn.exeInstallUtil.exe

pid	process
528	69577.exe
528	69577.exe
528	69577.exe
528	69577.exe
528	69577.exe
1776	dhfn.exe
1776	dhfn.exe
1688	InstallUtil.exe
1688	InstallUtil.exe
1688	InstallUtil.exe
1688	InstallUtil.exe
1688	InstallUtil.exe
1688	InstallUtil.exe
1688	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

69577.exedhfn.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 528 69577.exe
Token: SeDebugPrivilege 1776 dhfn.exe
Token: SeDebugPrivilege 1688 InstallUtil.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

2024 WINWORD.EXE
2024 WINWORD.EXE

description	pid	process
Token: SeDebugPrivilege	528	69577.exe
Token: SeDebugPrivilege	1776	dhfn.exe
Token: SeDebugPrivilege	1688	InstallUtil.exe

pid	process
2024	WINWORD.EXE
2024	WINWORD.EXE

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

WINWORD.EXEEQNEDT32.EXE69577.execmd.exedhfn.exe

description	pid	process	target process
PID 2024 wrote to memory of 488	2024	WINWORD.EXE	splwow64.exe
PID 2024 wrote to memory of 488	2024	WINWORD.EXE	splwow64.exe
PID 2024 wrote to memory of 488	2024	WINWORD.EXE	splwow64.exe
PID 2024 wrote to memory of 488	2024	WINWORD.EXE	splwow64.exe
PID 1776 wrote to memory of 528	1776	EQNEDT32.EXE	69577.exe
PID 1776 wrote to memory of 528	1776	EQNEDT32.EXE	69577.exe
PID 1776 wrote to memory of 528	1776	EQNEDT32.EXE	69577.exe
PID 1776 wrote to memory of 528	1776	EQNEDT32.EXE	69577.exe
PID 528 wrote to memory of 1236	528	69577.exe	cmd.exe
PID 528 wrote to memory of 1236	528	69577.exe	cmd.exe
PID 528 wrote to memory of 1236	528	69577.exe	cmd.exe
PID 528 wrote to memory of 1236	528	69577.exe	cmd.exe
PID 1236 wrote to memory of 1472	1236	cmd.exe	reg.exe
PID 1236 wrote to memory of 1472	1236	cmd.exe	reg.exe
PID 1236 wrote to memory of 1472	1236	cmd.exe	reg.exe
PID 1236 wrote to memory of 1472	1236	cmd.exe	reg.exe
PID 528 wrote to memory of 1776	528	69577.exe	dhfn.exe
PID 528 wrote to memory of 1776	528	69577.exe	dhfn.exe
PID 528 wrote to memory of 1776	528	69577.exe	dhfn.exe
PID 528 wrote to memory of 1776	528	69577.exe	dhfn.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe
PID 1776 wrote to memory of 1688	1776	dhfn.exe	InstallUtil.exe

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\IMG-0641.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2024

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:488

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:1776

C:\Users\Public\69577.exe
"C:\Users\Public\69577.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\dhfn.exe,"
3⤵
- Suspicious use of WriteProcessMemory
PID:1236

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\dhfn.exe,"
4⤵
- Modifies WinLogon for persistence
PID:1472

C:\Users\Admin\dhfn.exe
"C:\Users\Admin\dhfn.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1776

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1688

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\8TWSIUJE.txt
MD5
522a25c6220b1cccf3047eab0f11c289

SHA1
149bec9a284c315f4b3e7dece0d5dd20e93339d6

SHA256
2c3dd9fc6944855350f52806b0d99957c7dd59e1fb9f724eb1414738c4857220

SHA512
b05d7fd4776b1ce7789b347e2d511419ee2d6be14ee19c3de7beee110bd8a62e111048a9cd72a3a0aac0f27df66d938ec98769dc7335839cc01883e4f103f1e0

Download Submit
C:\Users\Admin\dhfn.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
C:\Users\Admin\dhfn.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
C:\Users\Public\69577.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
C:\Users\Public\69577.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
\Users\Admin\dhfn.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
\Users\Public\69577.exe
MD5
cf0e69a2b8739ddf78c0591882419c94

SHA1
4f674b7c178d58f67b45622300644837ab575bdd

SHA256
3a4d839dd867042efff6cc03629ad9a7a4cc6ab55437891161b6fdc48af09cd1

SHA512
399d3e61532eff0cf1a10b79675dcc83e381585f4400b07b62cade008fd79585a3233f0ce15a2fcdf0b2fbe84fdb72d59f9efc43a188469e87cf8ac25e4361fb

Download Submit
memory/488-2-0x0000000000000000-mapping.dmp

Download
memory/528-9-0x0000000001140000-0x0000000001141000-memory.dmp

Filesize
4KB

Download
memory/528-12-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/528-11-0x0000000000850000-0x000000000086E000-memory.dmp

Filesize
120KB

Download
memory/528-8-0x000000006B430000-0x000000006BB1E000-memory.dmp

Filesize
6.9MB

Download
memory/528-5-0x0000000000000000-mapping.dmp

Download
memory/1236-13-0x0000000000000000-mapping.dmp

Download
memory/1472-14-0x0000000000000000-mapping.dmp

Download
memory/1688-28-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/1688-29-0x000000000046373E-mapping.dmp

Download
memory/1688-32-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/1688-31-0x0000000000400000-0x0000000000468000-memory.dmp

Filesize
416KB

Download
memory/1688-33-0x000000006B430000-0x000000006BB1E000-memory.dmp

Filesize
6.9MB

Download
memory/1712-3-0x000007FEF6510000-0x000007FEF678A000-memory.dmp

Filesize
2.5MB

Download
memory/1776-25-0x0000000000E50000-0x0000000000E51000-memory.dmp

Filesize
4KB

Download
memory/1776-24-0x0000000000820000-0x000000000082B000-memory.dmp

Filesize
44KB

Download
memory/1776-20-0x0000000000E60000-0x0000000000E61000-memory.dmp

Filesize
4KB

Download
memory/1776-19-0x000000006B430000-0x000000006BB1E000-memory.dmp

Filesize
6.9MB

Download
memory/1776-16-0x0000000000000000-mapping.dmp

Download