4c26657af2c3d125e367f56a36faf49573f77c6a9af55143175ad81263569504

General

Target

4c26657af2c3d125e367f56a36faf49573f77c6a9af55143175ad81263569504.xlsm
Size

83KB
MD5

7af5d5d483a8030e2f6a8bb74b7d0f44
SHA1

75e2644fa41cb965a182fde157f78aee69a74a01
SHA256

4c26657af2c3d125e367f56a36faf49573f77c6a9af55143175ad81263569504
SHA512

f006236102582f2d47de79789aeb65dcde8dd363dd9c3f841a51740fe786031caf59ae06c63ea337d50e472c2145f8757156afbd60608a05f43d350cb39eec04

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://adi.iswks.com/assets/hO1v71pqfNN/

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	3020	2420	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

45 2804 rundll32.exe
46 2804 rundll32.exe
47 2804 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

3020 rundll32.exe
2292 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Azycbuknikfm\igkmc.sks 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
45	2804	rundll32.exe
46	2804	rundll32.exe
47	2804	rundll32.exe

pid	process
3020	rundll32.exe
2292	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Azycbuknikfm\igkmc.sks	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\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2420 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

2804 rundll32.exe
2804 rundll32.exe

pid	process
2804	rundll32.exe
2804	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE
2420	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 2420 wrote to memory of 3020	2420	EXCEL.EXE	rundll32.exe
PID 2420 wrote to memory of 3020	2420	EXCEL.EXE	rundll32.exe
PID 2420 wrote to memory of 3020	2420	EXCEL.EXE	rundll32.exe
PID 3020 wrote to memory of 2292	3020	rundll32.exe	rundll32.exe
PID 3020 wrote to memory of 2292	3020	rundll32.exe	rundll32.exe
PID 3020 wrote to memory of 2292	3020	rundll32.exe	rundll32.exe
PID 2292 wrote to memory of 3992	2292	rundll32.exe	rundll32.exe
PID 2292 wrote to memory of 3992	2292	rundll32.exe	rundll32.exe
PID 2292 wrote to memory of 3992	2292	rundll32.exe	rundll32.exe
PID 3992 wrote to memory of 2804	3992	rundll32.exe	rundll32.exe
PID 3992 wrote to memory of 2804	3992	rundll32.exe	rundll32.exe
PID 3992 wrote to memory of 2804	3992	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\4c26657af2c3d125e367f56a36faf49573f77c6a9af55143175ad81263569504.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2420

C:\Windows\SysWow64\rundll32.exe
C:\Windows\SysWow64\rundll32.exe ..\wxeu.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:3020

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\wxeu.ocx",DllRegisterServer
3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2292

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Azycbuknikfm\igkmc.sks",COWyVGDAYL
4⤵
- Suspicious use of WriteProcessMemory
PID:3992

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Azycbuknikfm\igkmc.sks",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:2804

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\wxeu.ocx

MD5
3bf1bb211627917c1b0d783cb63b9570

SHA1
044546525e7e82332834a5a116a9eb8baa6247da

SHA256
9943061f41fc96007730fb66e4d13bf9299c21874617120812c2b5d36b5209bc

SHA512
f26300eaa821ab803396a36313dddeb911b5717d12b3ab50f871d135e365522dfd726b5e74b11a88ef63cf384b27ecab8ba549c8673fb9c9549284551db4336e

Download Submit
\Users\Admin\wxeu.ocx

MD5
3bf1bb211627917c1b0d783cb63b9570

SHA1
044546525e7e82332834a5a116a9eb8baa6247da

SHA256
9943061f41fc96007730fb66e4d13bf9299c21874617120812c2b5d36b5209bc

SHA512
f26300eaa821ab803396a36313dddeb911b5717d12b3ab50f871d135e365522dfd726b5e74b11a88ef63cf384b27ecab8ba549c8673fb9c9549284551db4336e

Download Submit
\Users\Admin\wxeu.ocx

MD5
3bf1bb211627917c1b0d783cb63b9570

SHA1
044546525e7e82332834a5a116a9eb8baa6247da

SHA256
9943061f41fc96007730fb66e4d13bf9299c21874617120812c2b5d36b5209bc

SHA512
f26300eaa821ab803396a36313dddeb911b5717d12b3ab50f871d135e365522dfd726b5e74b11a88ef63cf384b27ecab8ba549c8673fb9c9549284551db4336e

Download Submit
memory/2292-266-0x0000000000000000-mapping.dmp

Download
memory/2420-118-0x00007FF98ABC0000-0x00007FF98ABD0000-memory.dmp

Filesize
64KB

Download
memory/2420-120-0x000001A77BAC0000-0x000001A77BAC2000-memory.dmp

Filesize
8KB

Download
memory/2420-121-0x000001A77BAC0000-0x000001A77BAC2000-memory.dmp

Filesize
8KB

Download
memory/2420-127-0x00007FF98ABC0000-0x00007FF98ABD0000-memory.dmp

Filesize
64KB

Download
memory/2420-119-0x000001A77BAC0000-0x000001A77BAC2000-memory.dmp

Filesize
8KB

Download
memory/2420-115-0x00007FF98ABC0000-0x00007FF98ABD0000-memory.dmp

Filesize
64KB

Download
memory/2420-117-0x00007FF98ABC0000-0x00007FF98ABD0000-memory.dmp

Filesize
64KB

Download
memory/2420-116-0x00007FF98ABC0000-0x00007FF98ABD0000-memory.dmp

Filesize
64KB

Download
memory/2804-283-0x0000000000000000-mapping.dmp

Download
memory/3020-259-0x0000000000000000-mapping.dmp

Download
memory/3992-279-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads