3fbe10e0cd5ce03f9783b908b0706d66253ff1e30dd77f6435ed360a43c69e4d

General

Target

subscription_1615866472.xlsb
Size

279KB
MD5

07571645cfa9005361c68f1d84975550
SHA1

b9020bd1ae5f35489a288f2e5aa7c068e08d540d
SHA256

ee9ba17fb42f85ed79f5a9f15673327579538de8eb268ea134b97bff3f54c44c
SHA512

3345b205c17240f5d11265491de01530e99ae37b4d7f3ae482bd09f23e184bba5c109b027dc56fa3b8ff331eca999b69571cf2fba1adb39ddcee64fd55f30fe7

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

certutil.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3948	508	certutil.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	504	508	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 1 IoCs

Processes:

rundll32.exe

flow pid process

30 3824 rundll32.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

3824 rundll32.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3844 3824 WerFault.exe rundll32.exe

flow	pid	process
30	3824	rundll32.exe

pid	process
3824	rundll32.exe

pid	pid_target	process	target process
3844	3824	WerFault.exe	rundll32.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

508 EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

WerFault.exe

pid	process
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 3844 WerFault.exe
Token: SeBackupPrivilege 3844 WerFault.exe
Token: SeDebugPrivilege 3844 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	3844	WerFault.exe
Token: SeBackupPrivilege	3844	WerFault.exe
Token: SeDebugPrivilege	3844	WerFault.exe

Suspicious use of SetWindowsHookEx 18 IoCs

Processes:

EXCEL.EXE

pid	process
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

EXCEL.EXErundll32.exe

description	pid	process	target process
PID 508 wrote to memory of 3948	508	EXCEL.EXE	certutil.exe
PID 508 wrote to memory of 3948	508	EXCEL.EXE	certutil.exe
PID 508 wrote to memory of 504	508	EXCEL.EXE	rundll32.exe
PID 508 wrote to memory of 504	508	EXCEL.EXE	rundll32.exe
PID 504 wrote to memory of 3824	504	rundll32.exe	rundll32.exe
PID 504 wrote to memory of 3824	504	rundll32.exe	rundll32.exe
PID 504 wrote to memory of 3824	504	rundll32.exe	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\subscription_1615866472.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:508

C:\Windows\System32\certutil.exe
"C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1914.png C:\Users\Public\jahi1914.pn
2⤵
- Process spawned unexpected child process
PID:3948

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1914.pn,DF j1
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:504

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1914.pn,DF j1
3⤵
- Blocklisted process makes network request
- Loads dropped DLL
PID:3824

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3824 -s 908
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3844

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Public\jahi1914.pn
MD5
0a8d825d553010e21a0ccaf054b74992

SHA1
b22a0d35636bda3b79e27f9abccef48905a5b025

SHA256
b8212f866c5cdf1a823031e24fe10444aab103d8fb55a25821e1c7c7366e580f

SHA512
910741f5583c2657c1ea496f9c99cf42ceb48c4b477f439396a0dd30707de61f814811a3d628c746bf0219b47a57f2ce44b7f119c729d7dd96f4e2d9d00d121c

Download Submit
C:\Users\Public\jahi1914.png
MD5
89d8d0af6d7d8a53e340d99d2bdeeab9

SHA1
b147882fcae315ca39cb468c5a3f5a024ada6e5d

SHA256
897578ec998760b8cc1eb88e0c2f11a79cee4f88b3d87e67b4147d74e92343e9

SHA512
199269cc7d45314ffa1c6a2275a7f0ff8ab7c5f030a50bc1e74b9d471d88ba2c4fbe7ed14cb95cb23f515fce207575a29dae811ee26765e87524950e5e44b0a9

Download Submit
\Users\Public\jahi1914.pn
MD5
0a8d825d553010e21a0ccaf054b74992

SHA1
b22a0d35636bda3b79e27f9abccef48905a5b025

SHA256
b8212f866c5cdf1a823031e24fe10444aab103d8fb55a25821e1c7c7366e580f

SHA512
910741f5583c2657c1ea496f9c99cf42ceb48c4b477f439396a0dd30707de61f814811a3d628c746bf0219b47a57f2ce44b7f119c729d7dd96f4e2d9d00d121c

Download Submit
memory/504-181-0x0000000000000000-mapping.dmp

Download
memory/508-117-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-122-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-121-0x00007FF96F700000-0x00007FF9707EE000-memory.dmp

Filesize
16.9MB

Download
memory/508-123-0x000001AB00000000-0x000001AB01EF5000-memory.dmp

Filesize
31.0MB

Download
memory/508-118-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-114-0x00007FF79CD30000-0x00007FF7A02E6000-memory.dmp

Filesize
53.7MB

Download
memory/508-116-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-115-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/3824-183-0x0000000000000000-mapping.dmp

Download
memory/3824-185-0x0000000000490000-0x000000000053E000-memory.dmp

Filesize
696KB

Download
memory/3948-179-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads