440496a116ae475c19a8a00af2b51c05c6a62040c4ec556fc7e7788682962be6

General

Target

case (2553).xls
Size

153KB
MD5

cab7720d67d7700d40b24fee321734ce
SHA1

cb22de552873492e9925853b3cb7ad2ad5a00e8c
SHA256

440496a116ae475c19a8a00af2b51c05c6a62040c4ec556fc7e7788682962be6
SHA512

2e9a2d66ac702b37a2326782de191c83dc9dbee0f3507dfe003b5f75de68de4771be132cbfb1b00065ba322ce4515d1e292de83a5819726acfbe7c3325f4ac87

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	3804	1196	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 3 IoCs

Processes:

msiexec.exe

flow pid process

33 3244 msiexec.exe
35 3244 msiexec.exe
37 3244 msiexec.exe
Loads dropped DLL 2 IoCs

Processes:

rundll32.exe

pid process

2204 rundll32.exe
2204 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 2204 set thread context of 3244 2204 rundll32.exe msiexec.exe

flow	pid	process
33	3244	msiexec.exe
35	3244	msiexec.exe
37	3244	msiexec.exe

pid	process
2204	rundll32.exe
2204	rundll32.exe

description	pid	process	target process
PID 2204 set thread context of 3244	2204	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 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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1196 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 3244 msiexec.exe
Token: SeSecurityPrivilege 3244 msiexec.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1196 EXCEL.EXE
1196 EXCEL.EXE

description	pid	process
Token: SeSecurityPrivilege	3244	msiexec.exe
Token: SeSecurityPrivilege	3244	msiexec.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE
1196	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 1196 wrote to memory of 3804	1196	EXCEL.EXE	rundll32.exe
PID 1196 wrote to memory of 3804	1196	EXCEL.EXE	rundll32.exe
PID 3804 wrote to memory of 2204	3804	rundll32.exe	rundll32.exe
PID 3804 wrote to memory of 2204	3804	rundll32.exe	rundll32.exe
PID 3804 wrote to memory of 2204	3804	rundll32.exe	rundll32.exe
PID 2204 wrote to memory of 3244	2204	rundll32.exe	msiexec.exe
PID 2204 wrote to memory of 3244	2204	rundll32.exe	msiexec.exe
PID 2204 wrote to memory of 3244	2204	rundll32.exe	msiexec.exe
PID 2204 wrote to memory of 3244	2204	rundll32.exe	msiexec.exe
PID 2204 wrote to memory of 3244	2204	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 (2553).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:1196

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:3804

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:2204

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
4⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:3244

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

Download Submit
\ProgramData\formnet.dll
MD5
b0f3fa047f6ae39a145fd364f693638e

SHA1
1951696d8aca4a31614bb68f9da392402785e14e

SHA256
0bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890

SHA512
86e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98

Download Submit
memory/1196-5-0x00007FFC48550000-0x00007FFC48B87000-memory.dmp

Filesize
6.2MB

Download
memory/1196-6-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1196-2-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1196-4-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/1196-3-0x00007FFC22770000-0x00007FFC22780000-memory.dmp

Filesize
64KB

Download
memory/2204-9-0x0000000000000000-mapping.dmp

Download
memory/2204-12-0x00000000009A1000-0x0000000000A70000-memory.dmp

Filesize
828KB

Download
memory/2204-13-0x00000000009A0000-0x00000000009C6000-memory.dmp

Filesize
152KB

Download
memory/2204-14-0x0000000000970000-0x0000000000971000-memory.dmp

Filesize
4KB

Download
memory/3244-15-0x0000000000000000-mapping.dmp

Download
memory/3244-16-0x0000000002F60000-0x0000000002F86000-memory.dmp

Filesize
152KB

Download
memory/3804-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads