28ce05e2ebeec4b1754d5ffcfe3e4486e8e9201f375da899aef2ea6d3b02dd60

General

Target

case (4374).xls
Size

153KB
MD5

2bc3acec77fec6f8a78b77c5efb5c5ee
SHA1

e4b3f2149b6d7b8ad912b127bd8ad9fb0eb0246b
SHA256

28ce05e2ebeec4b1754d5ffcfe3e4486e8e9201f375da899aef2ea6d3b02dd60
SHA512

a05914b1504997c5e52468987a20b9f2b877d665f510d985b0aa9798c936252d39986efd3e49f929c383550db1a200ba2c66c049e6340ef391d922553e828854

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	296	1048	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 4 IoCs

Processes:

msiexec.exe

flow pid process

32 1636 msiexec.exe
34 1636 msiexec.exe
36 1636 msiexec.exe
37 1636 msiexec.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

640 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 640 set thread context of 1636 640 rundll32.exe msiexec.exe

flow	pid	process
32	1636	msiexec.exe
34	1636	msiexec.exe
36	1636	msiexec.exe
37	1636	msiexec.exe

pid	process
640	rundll32.exe

description	pid	process	target process
PID 640 set thread context of 1636	640	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 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

1048 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

msiexec.exe

description pid process

Token: SeSecurityPrivilege 1636 msiexec.exe
Token: SeSecurityPrivilege 1636 msiexec.exe

description	pid	process
Token: SeSecurityPrivilege	1636	msiexec.exe
Token: SeSecurityPrivilege	1636	msiexec.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE
1048	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 1048 wrote to memory of 296	1048	EXCEL.EXE	rundll32.exe
PID 1048 wrote to memory of 296	1048	EXCEL.EXE	rundll32.exe
PID 296 wrote to memory of 640	296	rundll32.exe	rundll32.exe
PID 296 wrote to memory of 640	296	rundll32.exe	rundll32.exe
PID 296 wrote to memory of 640	296	rundll32.exe	rundll32.exe
PID 640 wrote to memory of 1636	640	rundll32.exe	msiexec.exe
PID 640 wrote to memory of 1636	640	rundll32.exe	msiexec.exe
PID 640 wrote to memory of 1636	640	rundll32.exe	msiexec.exe
PID 640 wrote to memory of 1636	640	rundll32.exe	msiexec.exe
PID 640 wrote to memory of 1636	640	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 (4374).xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1048

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:296

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:640

C:\Windows\SysWOW64\msiexec.exe
msiexec.exe
4⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:1636

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
memory/296-7-0x0000000000000000-mapping.dmp

Download
memory/640-11-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/640-9-0x0000000000000000-mapping.dmp

Download
memory/640-12-0x0000000003290000-0x0000000003291000-memory.dmp

Filesize
4KB

Download
memory/1048-6-0x00007FFA6A590000-0x00007FFA6ABC7000-memory.dmp

Filesize
6.2MB

Download
memory/1048-5-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/1048-4-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/1048-3-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/1048-2-0x00007FFA46D50000-0x00007FFA46D60000-memory.dmp

Filesize
64KB

Download
memory/1636-13-0x0000000000000000-mapping.dmp

Download
memory/1636-14-0x0000000002ED0000-0x0000000002EF6000-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