ef5b81d7eebf08ed869799e9022ca82ff0a5c781b72bb6652fbc1fe7f0e4ebcc

General

Target

Proof of payment for overdue invoice.doc
Size

1.0MB
MD5

fef57f1f8bc2bc336fa0fe4f1d5e3f30
SHA1

c0169f4d359c5e889d6dc19a3559e1a4dd8bacc8
SHA256

ef5b81d7eebf08ed869799e9022ca82ff0a5c781b72bb6652fbc1fe7f0e4ebcc
SHA512

0009f9fb516136f198b09e5a64fa128be5d4aa1442a1d0d48a8308326c36ff6d2f9bbe394bbeb25245899dc65732f42bd1183770d1aba57ec0ef49c137fc1a4b

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:

FLTLDR.EXE

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	3848	3924	FLTLDR.EXE	WINWORD.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:

WINWORD.EXE

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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WINWORD.EXE

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

Modifies registry class 10 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\Registry\User\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_1142\Children	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_1142\Children	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916\Children	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916\DisplayName = "OICE_16_974FA576_32C1D314_1142"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916\Moniker = "oice_16_974fa576_32c1d314_1142"	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-1191733730-3140361995-1772759657-659826123-2350832150-863116754-1743706916\Children	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_1142	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_1142	WINWORD.EXE

NTFS ADS 1 IoCs

Processes:

WINWORD.EXE

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\{65101504-91C4-4E33-B5FE-11CD390ABC0F}\abdtfhghgdghghœ.ScT:Zone.Identifier	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

3924 WINWORD.EXE
3924 WINWORD.EXE

Suspicious use of SetWindowsHookEx 10 IoCs

Processes:

WINWORD.EXE

pid	process
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE
3924	WINWORD.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WINWORD.EXE

description	pid	process	target process
PID 3924 wrote to memory of 3848	3924	WINWORD.EXE	FLTLDR.EXE
PID 3924 wrote to memory of 3848	3924	WINWORD.EXE	FLTLDR.EXE

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Proof of payment for overdue invoice.doc" /o ""
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:3924

C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE
"C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE" C:\Program Files\Common Files\Microsoft Shared\GRPHFLT\PNG32.FLT
2⤵
- Process spawned unexpected child process
PID:3848

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

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Downloads

C:\Users\Admin\AppData\Local\Packages\oice_16_974fa576_32c1d314_1142\AC\Temp\FL528A.tmp
MD5
2f0b7d89aab312e55f733fb116f62479

SHA1
a753dd1291ebb882aaa0845b2dac718e02163408

SHA256
1dd7cd9e04423de278f7d4de5eeaa298b01274ac29dde95a8f86f7cef3941a67

SHA512
3eb2f690702da37de9a5e42275b55845d6935837ddd22d4904d451f771a378c12fb79c24d31c29a2960cd56b5a2b64bc2c86b3461aa41d1801e91036d156bd27

Download Submit
memory/3848-302-0x0000000000000000-mapping.dmp

Download
memory/3848-373-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3848-320-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3848-315-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3848-311-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3924-117-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3924-123-0x00007FFDE2610000-0x00007FFDE4505000-memory.dmp

Filesize
31.0MB

Download
memory/3924-122-0x00007FFDE4510000-0x00007FFDE55FE000-memory.dmp

Filesize
16.9MB

Download
memory/3924-118-0x00007FFDEBC90000-0x00007FFDEE7B3000-memory.dmp

Filesize
43.1MB

Download
memory/3924-119-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3924-114-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3924-116-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download
memory/3924-115-0x00007FFDCA390000-0x00007FFDCA3A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads