829419a788104ec45e82487738be2779a83cac1b65bfc9343e351e75cfa49f5e

Target

Document931215825.xls
Size

53KB
MD5

ef687c6dd0731d96d622ac024974a35b
SHA1

907be2046fd958898fa14be35f567cbb30e5e8bb
SHA256

829419a788104ec45e82487738be2779a83cac1b65bfc9343e351e75cfa49f5e
SHA512

64c3ff8bcab43efaa971816463a620f02f760c84c60daa96d1937046b746156ab8f8461d6c68051e198e156b24133831fc663779c4f389f92ef146b6eb6a3fc5

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:

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	2336	540	rundll32.exe	EXCEL.EXE

Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

2340 rundll32.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

38 wtfismyip.com
Drops file in Windows directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\explorer.exe rundll32.exe

pid	process
2340	rundll32.exe

flow	ioc
38	wtfismyip.com

description	ioc	process
File opened for modification	C:\Windows\explorer.exe	rundll32.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

540 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

wermgr.exe

description pid process

Token: SeDebugPrivilege 2756 wermgr.exe

description	pid	process
Token: SeDebugPrivilege	2756	wermgr.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE
540	EXCEL.EXE

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exe

description	pid	process	target process
PID 540 wrote to memory of 2336	540	EXCEL.EXE	rundll32.exe
PID 540 wrote to memory of 2336	540	EXCEL.EXE	rundll32.exe
PID 2336 wrote to memory of 2340	2336	rundll32.exe	rundll32.exe
PID 2336 wrote to memory of 2340	2336	rundll32.exe	rundll32.exe
PID 2336 wrote to memory of 2340	2336	rundll32.exe	rundll32.exe
PID 2340 wrote to memory of 2756	2340	rundll32.exe	wermgr.exe
PID 2340 wrote to memory of 2756	2340	rundll32.exe	wermgr.exe
PID 2340 wrote to memory of 2756	2340	rundll32.exe	wermgr.exe
PID 2340 wrote to memory of 2756	2340	rundll32.exe	wermgr.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\Document931215825.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:540

C:\Windows\SYSTEM32\rundll32.exe
rundll32 C:\IntelCompany\JIOLAS.RRTTOOKK,DllRegisterServer
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2336

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\IntelCompany\JIOLAS.RRTTOOKK,DllRegisterServer
3⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2340

C:\Windows\system32\wermgr.exe
C:\Windows\system32\wermgr.exe
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2756

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\IntelCompany\JIOLAS.RRTTOOKK
MD5
83a8d8060b6a7b78bf3c4f6628e699a5

SHA1
13a260eac7c42c54fd292ca517f795e368705bfc

SHA256
4c393143111c5013b00e43d608305e03076c24a9bcfc051e70de597814f69038

SHA512
60d84dc3e3d8fd383fae29b296371f45822e5a91d85d8782cb7010f265d42f4c0e16f22601d21d63a85f7f631d44c892fc1cf656cb7cd024760b90e6eaebf24f

Download Submit
\IntelCompany\JIOLAS.RRTTOOKK
MD5
83a8d8060b6a7b78bf3c4f6628e699a5

SHA1
13a260eac7c42c54fd292ca517f795e368705bfc

SHA256
4c393143111c5013b00e43d608305e03076c24a9bcfc051e70de597814f69038

SHA512
60d84dc3e3d8fd383fae29b296371f45822e5a91d85d8782cb7010f265d42f4c0e16f22601d21d63a85f7f631d44c892fc1cf656cb7cd024760b90e6eaebf24f

Download Submit
memory/540-2-0x00007FF9A71F0000-0x00007FF9A7827000-memory.dmp

Filesize
6.2MB

Download
memory/2336-5-0x0000000000000000-mapping.dmp

Download
memory/2340-7-0x0000000000000000-mapping.dmp

Download
memory/2340-9-0x0000000000610000-0x0000000000649000-memory.dmp

Filesize
228KB

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memory/2340-10-0x0000000010000000-0x0000000010038000-memory.dmp

Filesize
224KB

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memory/2756-11-0x0000000000000000-mapping.dmp

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