38e63247da950af1a3a96864cef46f801d99fe847c9cfab2022dd1bbfd969247

General

Target

38e63247da950af1a3a96864cef46f801d99fe847c9cfab2022dd1bbfd969247.xlsm
Size

83KB
MD5

a0af41ef26d2bd43511e21159b1059ec
SHA1

b08b89450e52e611ce8f40bf3e433c7faa62bc1e
SHA256

38e63247da950af1a3a96864cef46f801d99fe847c9cfab2022dd1bbfd969247
SHA512

fea9b6a44b9903c38ef56cb320e1f4e1be92d13775e61e4a59906ba0e127506d36e2d729f72011298c6c846cd5a03fc993e2b5b7cc61c3aecffb3f5ddadb2d27

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://www.crownpacificpartners.com/guglio/Rt4el/

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	2620	456	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

46 3604 rundll32.exe
47 3604 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

2620 rundll32.exe
2180 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Bsqnyprceq\iytcgsaqnnraep.fkw rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

flow	pid	process
46	3604	rundll32.exe
47	3604	rundll32.exe

pid	process
2620	rundll32.exe
2180	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Bsqnyprceq\iytcgsaqnnraep.fkw	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

456 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

3604 rundll32.exe
3604 rundll32.exe

pid	process
3604	rundll32.exe
3604	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE
456	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 456 wrote to memory of 2620	456	EXCEL.EXE	rundll32.exe
PID 456 wrote to memory of 2620	456	EXCEL.EXE	rundll32.exe
PID 456 wrote to memory of 2620	456	EXCEL.EXE	rundll32.exe
PID 2620 wrote to memory of 2180	2620	rundll32.exe	rundll32.exe
PID 2620 wrote to memory of 2180	2620	rundll32.exe	rundll32.exe
PID 2620 wrote to memory of 2180	2620	rundll32.exe	rundll32.exe
PID 2180 wrote to memory of 1680	2180	rundll32.exe	rundll32.exe
PID 2180 wrote to memory of 1680	2180	rundll32.exe	rundll32.exe
PID 2180 wrote to memory of 1680	2180	rundll32.exe	rundll32.exe
PID 1680 wrote to memory of 3604	1680	rundll32.exe	rundll32.exe
PID 1680 wrote to memory of 3604	1680	rundll32.exe	rundll32.exe
PID 1680 wrote to memory of 3604	1680	rundll32.exe	rundll32.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\38e63247da950af1a3a96864cef46f801d99fe847c9cfab2022dd1bbfd969247.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:456

C:\Windows\SysWow64\rundll32.exe
C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2620

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2180

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bsqnyprceq\iytcgsaqnnraep.fkw",SOhAimPgB
4⤵
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Bsqnyprceq\iytcgsaqnnraep.fkw",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:3604

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:\Users\Admin\erum.ocx
MD5
71b9190e4bb6342e08cd0b150d6f1465

SHA1
e3c67b545fded250f1a03b9fa94cf90d156db93b

SHA256
ebfa0393fef306631c53ab660185a01fb11664951e13be7bddbdf84251ae464b

SHA512
af05d805223869e8d55429234a51d6d218c119500a1ffed4fcbccaebd80465bce112b4192eacc75d969a0394f2d7d8dfa3870c305e73e9ed4567ae0954a797e4

Download Submit
\Users\Admin\erum.ocx
MD5
71b9190e4bb6342e08cd0b150d6f1465

SHA1
e3c67b545fded250f1a03b9fa94cf90d156db93b

SHA256
ebfa0393fef306631c53ab660185a01fb11664951e13be7bddbdf84251ae464b

SHA512
af05d805223869e8d55429234a51d6d218c119500a1ffed4fcbccaebd80465bce112b4192eacc75d969a0394f2d7d8dfa3870c305e73e9ed4567ae0954a797e4

Download Submit
\Users\Admin\erum.ocx
MD5
71b9190e4bb6342e08cd0b150d6f1465

SHA1
e3c67b545fded250f1a03b9fa94cf90d156db93b

SHA256
ebfa0393fef306631c53ab660185a01fb11664951e13be7bddbdf84251ae464b

SHA512
af05d805223869e8d55429234a51d6d218c119500a1ffed4fcbccaebd80465bce112b4192eacc75d969a0394f2d7d8dfa3870c305e73e9ed4567ae0954a797e4

Download Submit
memory/456-119-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Filesize
64KB

Download
memory/456-116-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Filesize
64KB

Download
memory/456-120-0x00000271A8CB0000-0x00000271A8CB2000-memory.dmp

Filesize
8KB

Download
memory/456-121-0x00000271A8CB0000-0x00000271A8CB2000-memory.dmp

Filesize
8KB

Download
memory/456-122-0x00000271A8CB0000-0x00000271A8CB2000-memory.dmp

Filesize
8KB

Download
memory/456-128-0x00007FFE8D940000-0x00007FFE8D950000-memory.dmp

Filesize
64KB

Download
memory/456-129-0x00007FFE8D940000-0x00007FFE8D950000-memory.dmp

Filesize
64KB

Download
memory/456-118-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Filesize
64KB

Download
memory/456-117-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Filesize
64KB

Download
memory/456-115-0x00007FFE91410000-0x00007FFE91420000-memory.dmp

Filesize
64KB

Download
memory/1680-278-0x0000000000000000-mapping.dmp

Download
memory/2180-266-0x0000000000000000-mapping.dmp

Download
memory/2620-261-0x0000000000000000-mapping.dmp

Download
memory/3604-283-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads