594b6fc5ffe9608371a2853db4a54d89d5bef4294680bfd835fa05b20f575b17

General

Target

Purchase-Order.xlsx
Size

1.3MB
MD5

08bfe97addcfdc8ea68d56a80a16621a
SHA1

2111b3ffb8b32bad9d341848bdab6688e280a222
SHA256

594b6fc5ffe9608371a2853db4a54d89d5bef4294680bfd835fa05b20f575b17
SHA512

f17cc20e7884ef6b1d446feeb35f65129ec4cfd3a86208c7b639d9b3d1ac36d51b92c5aa9ed31d20f20ea61b895aa071ed8755752581620e110087f36171cd91

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1696 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

432 vbc.exe
844 vbc.exe
Loads dropped DLL 5 IoCs

Processes:

EQNEDT32.EXEWerFault.exe

pid process

1696 EQNEDT32.EXE
1696 EQNEDT32.EXE
316 WerFault.exe
316 WerFault.exe
316 WerFault.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

vbc.exe

description pid process target process

PID 432 set thread context of 844 432 vbc.exe vbc.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

316 844 WerFault.exe vbc.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.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

Processes:

EQNEDT32.EXE

pid process

1696 EQNEDT32.EXE

flow	pid	process
6	1696	EQNEDT32.EXE

pid	process
432	vbc.exe
844	vbc.exe

pid	process
1696	EQNEDT32.EXE
1696	EQNEDT32.EXE
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe

description	pid	process	target process
PID 432 set thread context of 844	432	vbc.exe	vbc.exe

pid	pid_target	process	target process
316	844	WerFault.exe	vbc.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
1696	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

784 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

WerFault.exe

pid process

316 WerFault.exe
316 WerFault.exe
316 WerFault.exe
316 WerFault.exe
316 WerFault.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

WerFault.exe

pid process

316 WerFault.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

vbc.exe

pid process

432 vbc.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

WerFault.exe

description pid process

Token: SeDebugPrivilege 316 WerFault.exe
Suspicious use of SetWindowsHookEx 5 IoCs

Processes:

EXCEL.EXE

pid process

784 EXCEL.EXE
784 EXCEL.EXE
784 EXCEL.EXE
784 EXCEL.EXE
784 EXCEL.EXE

pid	process
784	EXCEL.EXE

pid	process
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe
316	WerFault.exe

pid	process
316	WerFault.exe

pid	process
432	vbc.exe

description	pid	process
Token: SeDebugPrivilege	316	WerFault.exe

pid	process
784	EXCEL.EXE
784	EXCEL.EXE
784	EXCEL.EXE
784	EXCEL.EXE
784	EXCEL.EXE

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

EQNEDT32.EXEvbc.exevbc.exe

description	pid	process	target process
PID 1696 wrote to memory of 432	1696	EQNEDT32.EXE	vbc.exe
PID 1696 wrote to memory of 432	1696	EQNEDT32.EXE	vbc.exe
PID 1696 wrote to memory of 432	1696	EQNEDT32.EXE	vbc.exe
PID 1696 wrote to memory of 432	1696	EQNEDT32.EXE	vbc.exe
PID 432 wrote to memory of 844	432	vbc.exe	vbc.exe
PID 432 wrote to memory of 844	432	vbc.exe	vbc.exe
PID 432 wrote to memory of 844	432	vbc.exe	vbc.exe
PID 432 wrote to memory of 844	432	vbc.exe	vbc.exe
PID 432 wrote to memory of 844	432	vbc.exe	vbc.exe
PID 844 wrote to memory of 316	844	vbc.exe	WerFault.exe
PID 844 wrote to memory of 316	844	vbc.exe	WerFault.exe
PID 844 wrote to memory of 316	844	vbc.exe	WerFault.exe
PID 844 wrote to memory of 316	844	vbc.exe	WerFault.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Purchase-Order.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:784

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:1696

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:432

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 524
4⤵
- Loads dropped DLL
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
PID:316

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
C:\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
C:\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
\Users\Public\vbc.exe
MD5
63a91aa1f367950eaef7b38117483628

SHA1
c70db448a527d8493c69f635d0ac981d0855fd2e

SHA256
0fc450ebd441e9037f509104c318a1c38cdbf7d6dd2fea77b1011d6fa956ca52

SHA512
a5305e285371a533cb57aefe8ec3eaa6a5f5f345d9452f0462bdbea07590df2ce4c82ad0a63868381a38ffd916408d8ff055bc9e505afc249924e54294bda906

Download Submit
memory/316-82-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/316-77-0x0000000000000000-mapping.dmp

Download
memory/432-73-0x0000000000290000-0x0000000000292000-memory.dmp

Filesize
8KB

Download
memory/432-66-0x0000000000000000-mapping.dmp

Download
memory/784-83-0x0000000005A40000-0x0000000005A42000-memory.dmp

Filesize
8KB

Download
memory/784-85-0x0000000005A44000-0x0000000005A46000-memory.dmp

Filesize
8KB

Download
memory/784-90-0x0000000005A4E000-0x0000000005A4F000-memory.dmp

Filesize
4KB

Download
memory/784-89-0x0000000005A4C000-0x0000000005A4E000-memory.dmp

Filesize
8KB

Download
memory/784-87-0x0000000005A49000-0x0000000005A4A000-memory.dmp

Filesize
4KB

Download
memory/784-88-0x0000000005A4A000-0x0000000005A4C000-memory.dmp

Filesize
8KB

Download
memory/784-62-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/784-61-0x0000000071091000-0x0000000071093000-memory.dmp

Filesize
8KB

Download
memory/784-84-0x0000000005A42000-0x0000000005A44000-memory.dmp

Filesize
8KB

Download
memory/784-60-0x000000002F6C1000-0x000000002F6C4000-memory.dmp

Filesize
12KB

Download
memory/784-86-0x0000000005A46000-0x0000000005A49000-memory.dmp

Filesize
12KB

Download
memory/844-75-0x0000000004621000-0x0000000004622000-memory.dmp

Filesize
4KB

Download
memory/844-70-0x000000000040188B-mapping.dmp

Download
memory/844-74-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/844-76-0x0000000001EC0000-0x0000000001EF7000-memory.dmp

Filesize
220KB

Download
memory/1696-63-0x0000000075AA1000-0x0000000075AA3000-memory.dmp

Filesize
8KB

Download

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