5f977be3728f4430755cc34c8be0fad95d9b5882c5397f30f82243ec6085beac

General

Target

tell,07.27.21.doc
Size

74KB
MD5

d19eb38aa7f7b4523fc5500421a28fd6
SHA1

64accb8248012c61c317f7be8d8d5c53121fd1e1
SHA256

5f977be3728f4430755cc34c8be0fad95d9b5882c5397f30f82243ec6085beac
SHA512

6506bd287f582db22a232d6276e18d82d4449fb899c7c4fe2816b0bf5b79344ef6e13fdadd0ae24bd2a72668bafb67ca58813d7c786d92f19a6ee010a253a6e5

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:

cmd.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	3152	4092	cmd.exe	WINWORD.EXE

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

Processes:

WerFault.exe

description pid process target process

PID 2848 created 3288 2848 WerFault.exe mshta.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

516 3288 WerFault.exe mshta.exe
2848 3288 WerFault.exe mshta.exe

description	pid	process	target process
PID 2848 created 3288	2848	WerFault.exe	mshta.exe

pid	pid_target	process	target process
516	3288	WerFault.exe	mshta.exe
2848	3288	WerFault.exe	mshta.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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
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

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 1 IoCs

Processes:

cmd.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings cmd.exe
Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

4092 WINWORD.EXE
4092 WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

WerFault.exe

pid	process
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe
516	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

WerFault.exe

description pid process

Token: SeRestorePrivilege 516 WerFault.exe
Token: SeBackupPrivilege 516 WerFault.exe
Token: SeDebugPrivilege 516 WerFault.exe

description	pid	process
Token: SeRestorePrivilege	516	WerFault.exe
Token: SeBackupPrivilege	516	WerFault.exe
Token: SeDebugPrivilege	516	WerFault.exe

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

WINWORD.EXE

pid	process
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE
4092	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

WINWORD.EXEcmd.exe

description	pid	process	target process
PID 4092 wrote to memory of 3152	4092	WINWORD.EXE	cmd.exe
PID 4092 wrote to memory of 3152	4092	WINWORD.EXE	cmd.exe
PID 3152 wrote to memory of 3288	3152	cmd.exe	mshta.exe
PID 3152 wrote to memory of 3288	3152	cmd.exe	mshta.exe
PID 3152 wrote to memory of 3288	3152	cmd.exe	mshta.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\tell,07.27.21.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4092

C:\Windows\SYSTEM32\cmd.exe
cmd /c c:\programdata\variableProcProc.hta
2⤵
- Process spawned unexpected child process
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3152

C:\Windows\SysWOW64\mshta.exe
"C:\Windows\SysWOW64\mshta.exe" "C:\programdata\variableProcProc.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
3⤵
PID:3288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3288 -s 1368
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:516

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3288 -s 1640
4⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Program crash
PID:2848

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\variableProcProc.hta
MD5
c3bbf2b8611fa3dc96c7103cf08a47ce

SHA1
be8d2925e19e70efb808f10a9e76c257f975fb86

SHA256
0e934cb850a20bae825bd22d3d1050323944f6253e942953b5df777eeae0e4c4

SHA512
d6dbec60a2eb20a7453036adbc26f9c5b0c9b6ca0ebcf6d982c947063fa383dde8aecf773b88ffe492322b3db01f55c1ade00ebc910ea001eae214fabed0427a

Download Submit
memory/3152-235-0x0000000000000000-mapping.dmp

Download
memory/3288-261-0x0000000000000000-mapping.dmp

Download
memory/4092-117-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

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memory/4092-119-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

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memory/4092-118-0x00007FFF97F10000-0x00007FFF9AA33000-memory.dmp

Filesize
43.1MB

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memory/4092-122-0x00007FFF92A50000-0x00007FFF93B3E000-memory.dmp

Filesize
16.9MB

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memory/4092-123-0x00007FFF90A80000-0x00007FFF92975000-memory.dmp

Filesize
31.0MB

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memory/4092-114-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

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memory/4092-116-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

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memory/4092-115-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4092-344-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4092-345-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4092-346-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

Download
memory/4092-347-0x00007FFF77040000-0x00007FFF77050000-memory.dmp

Filesize
64KB

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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