31ea3370ca06a2af45514a59a0ae49dc62ac34bc4dce44402f169a9d6fb93853

General

Target

case (4335).xls
Size

153KB
MD5

bf86559630b855e4bf2c54d641147b24
SHA1

182cbac1bdd020fa5fee6ed9d6a50d1071fbe320
SHA256

31ea3370ca06a2af45514a59a0ae49dc62ac34bc4dce44402f169a9d6fb93853
SHA512

f188cdd1ae628850d5a48f32ec17d399fdbed68ed6a6e92977374dac61a0d3286f0a2c1ff83ae4b70af219c9f3d7b49aa4ac5125f63f7f75fc6b70a17a4ddc83

Score

10^/10

ransomware

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

rundll32.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	3108	756	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 3 IoCs

Processes:

msiexec.exe

flow pid process

34 3180 msiexec.exe
36 3180 msiexec.exe
38 3180 msiexec.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1452 rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082
Suspicious use of SetThreadContext 1 IoCs

Processes:

rundll32.exe

description pid process target process

PID 1452 set thread context of 3180 1452 rundll32.exe msiexec.exe

flow	pid	process
34	3180	msiexec.exe
36	3180	msiexec.exe
38	3180	msiexec.exe

pid	process
1452	rundll32.exe

description	pid	process	target process
PID 1452 set thread context of 3180	1452	rundll32.exe	msiexec.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

756 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 3180 msiexec.exe
Token: SeSecurityPrivilege 3180 msiexec.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

756 EXCEL.EXE
756 EXCEL.EXE

description	pid	process
Token: SeSecurityPrivilege	3180	msiexec.exe
Token: SeSecurityPrivilege	3180	msiexec.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE
756	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 756 wrote to memory of 3108	756	EXCEL.EXE	rundll32.exe
PID 756 wrote to memory of 3108	756	EXCEL.EXE	rundll32.exe
PID 3108 wrote to memory of 1452	3108	rundll32.exe	rundll32.exe
PID 3108 wrote to memory of 1452	3108	rundll32.exe	rundll32.exe
PID 3108 wrote to memory of 1452	3108	rundll32.exe	rundll32.exe
PID 1452 wrote to memory of 3180	1452	rundll32.exe	msiexec.exe
PID 1452 wrote to memory of 3180	1452	rundll32.exe	msiexec.exe
PID 1452 wrote to memory of 3180	1452	rundll32.exe	msiexec.exe
PID 1452 wrote to memory of 3180	1452	rundll32.exe	msiexec.exe
PID 1452 wrote to memory of 3180	1452	rundll32.exe	msiexec.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\case (4335).xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\System32\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:3108

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer
3⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1452

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
4⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:3180

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

Download Submit
\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

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memory/756-5-0x00007FFFD2360000-0x00007FFFD2997000-memory.dmp

Filesize
6.2MB

Download
memory/756-2-0x00007FFFABD70000-0x00007FFFABD80000-memory.dmp

Filesize
64KB

Download
memory/756-6-0x00007FFFABD70000-0x00007FFFABD80000-memory.dmp

Filesize
64KB

Download
memory/756-4-0x00007FFFABD70000-0x00007FFFABD80000-memory.dmp

Filesize
64KB

Download
memory/756-3-0x00007FFFABD70000-0x00007FFFABD80000-memory.dmp

Filesize
64KB

Download
memory/1452-9-0x0000000000000000-mapping.dmp

Download
memory/1452-11-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1452-12-0x0000000003200000-0x0000000003201000-memory.dmp

Filesize
4KB

Download
memory/3108-7-0x0000000000000000-mapping.dmp

Download
memory/3180-13-0x0000000000000000-mapping.dmp

Download
memory/3180-14-0x0000000002BA0000-0x0000000002BC6000-memory.dmp

Filesize
152KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads