5e7922b838a9a8edc76bb6629c189c55125e40fc812f4b57bfad3e37feb68d86

General

Target

PO-SKT112322011.xls
Size

1.0MB
MD5

6fbba09eebd42a47f089767b92b9c778
SHA1

1af588c699ab643e334824dc26cf9baf4ddca8d5
SHA256

5e7922b838a9a8edc76bb6629c189c55125e40fc812f4b57bfad3e37feb68d86
SHA512

3d82ab0b12aba89483d19a85f3421598046e057f5f930412042c515c873a791289f54c26fc90080fd5e9232e3c2757d4c9c68840148467b9fa931e3e4acbde31
SSDEEP

24576:Mr5XXXXXXXXXXXXUXXXXXXXSXXXXXXXX6m6r5XXXXXXXXXXXXUXXXXXXXSXXXXXt:sE4gT

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

4 516 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

vbc.exe

pid process

1960 vbc.exe
Loads dropped DLL 5 IoCs

Processes:

EQNEDT32.EXE

pid process

516 EQNEDT32.EXE
516 EQNEDT32.EXE
516 EQNEDT32.EXE
516 EQNEDT32.EXE
516 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
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

516 EQNEDT32.EXE

flow	pid	process
4	516	EQNEDT32.EXE

pid	process
1960	vbc.exe

pid	process
516	EQNEDT32.EXE
516	EQNEDT32.EXE
516	EQNEDT32.EXE
516	EQNEDT32.EXE
516	EQNEDT32.EXE

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

pid	process
516	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-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

960 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

960 EXCEL.EXE
960 EXCEL.EXE
960 EXCEL.EXE

pid	process
960	EXCEL.EXE

pid	process
960	EXCEL.EXE
960	EXCEL.EXE
960	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EQNEDT32.EXE

description	pid	process	target process
PID 516 wrote to memory of 1960	516	EQNEDT32.EXE	vbc.exe
PID 516 wrote to memory of 1960	516	EQNEDT32.EXE	vbc.exe
PID 516 wrote to memory of 1960	516	EQNEDT32.EXE	vbc.exe
PID 516 wrote to memory of 1960	516	EQNEDT32.EXE	vbc.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\PO-SKT112322011.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:960

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:516

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
PID:1960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

Scripting

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
C:\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
\Users\Public\vbc.exe

Filesize
1.2MB

MD5
b0683925365bc31d28e77520b55a6175

SHA1
2ce8ad01ee917b1307eb706b33fcc7af7276612e

SHA256
675e5a2d1850dbf2fd2a6e99bc566e717a3b2221c7fe4c6c0ce28cd14e09f64e

SHA512
6272ff19d48d60a1477a5e06ac93dca854c49e9193fadd481e76419821fec68e0364e4c8991711f634e98ca990fc142efffdc8f082f7731641be41bff40fb0ad

Download Submit
memory/960-60-0x0000000072AED000-0x0000000072AF8000-memory.dmp

Filesize
44KB

Download
memory/960-58-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

Filesize
8KB

Download
memory/960-57-0x0000000072AED000-0x0000000072AF8000-memory.dmp

Filesize
44KB

Download
memory/960-54-0x000000002F451000-0x000000002F454000-memory.dmp

Filesize
12KB

Download
memory/960-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/960-55-0x0000000071B01000-0x0000000071B03000-memory.dmp

Filesize
8KB

Download
memory/1960-66-0x0000000000000000-mapping.dmp

Download
memory/1960-69-0x0000000000A40000-0x0000000000B72000-memory.dmp

Filesize
1.2MB

Download

Analysis

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