62693b6b06025484f7f9ef6c5639c942a879fbd49e87983c83541106f3566ad2

General

Target

62693b6b06025484f7f9ef6c5639c942a879fbd49e87983c83541106f3566ad2.xlsm
Size

83KB
MD5

a5d6144a863e7ac8f56b2b6c88516eb2
SHA1

882cdbecc31ba88b223e54b15ca332221a6b58e5
SHA256

62693b6b06025484f7f9ef6c5639c942a879fbd49e87983c83541106f3566ad2
SHA512

c0dfe8c519d4acf1289f3f3bdf8612d7a879bc380fd7c22f32d5341ffe9e1f113fecd7823dfdbf8b813b7c5826dfa68c009cab2a72fa15ab6ce80a198d07f795

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://mail.emilyanncain.com/cgi-bin/A7NT3ENvn/

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	2872	2344	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

36 3864 rundll32.exe
37 3864 rundll32.exe
38 3864 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

2872 rundll32.exe
3572 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Hrvsrytuln\sycqqd.plm 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
36	3864	rundll32.exe
37	3864	rundll32.exe
38	3864	rundll32.exe

pid	process
2872	rundll32.exe
3572	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Hrvsrytuln\sycqqd.plm	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

2344 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

3864 rundll32.exe
3864 rundll32.exe

pid	process
3864	rundll32.exe
3864	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE
2344	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 2344 wrote to memory of 2872	2344	EXCEL.EXE	rundll32.exe
PID 2344 wrote to memory of 2872	2344	EXCEL.EXE	rundll32.exe
PID 2344 wrote to memory of 2872	2344	EXCEL.EXE	rundll32.exe
PID 2872 wrote to memory of 3572	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 3572	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 3572	2872	rundll32.exe	rundll32.exe
PID 3572 wrote to memory of 1028	3572	rundll32.exe	rundll32.exe
PID 3572 wrote to memory of 1028	3572	rundll32.exe	rundll32.exe
PID 3572 wrote to memory of 1028	3572	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 3864	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 3864	1028	rundll32.exe	rundll32.exe
PID 1028 wrote to memory of 3864	1028	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\62693b6b06025484f7f9ef6c5639c942a879fbd49e87983c83541106f3566ad2.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2344

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:2872

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:3572

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Hrvsrytuln\sycqqd.plm",CLTDuzQPkHpSD
4⤵
- Suspicious use of WriteProcessMemory
PID:1028

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Hrvsrytuln\sycqqd.plm",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:3864

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
3ddc96812e347c89f5c1fef805462e9d

SHA1
ba686d9d9caa7d35b1c9ee507863645f029a385c

SHA256
9caa54943b5d009ad41e975fc56f1b9771cdf9237fea48a11c081493a07ab0b0

SHA512
433f013db921ef0ccdc034762c36e5815d9120ee3300743891bc0c6330980e1246debcf079c188ef6b7c82803ade5643b2f653dd4d68686cf0fa68545901f941

Download Submit
\Users\Admin\erum.ocx
MD5
3ddc96812e347c89f5c1fef805462e9d

SHA1
ba686d9d9caa7d35b1c9ee507863645f029a385c

SHA256
9caa54943b5d009ad41e975fc56f1b9771cdf9237fea48a11c081493a07ab0b0

SHA512
433f013db921ef0ccdc034762c36e5815d9120ee3300743891bc0c6330980e1246debcf079c188ef6b7c82803ade5643b2f653dd4d68686cf0fa68545901f941

Download Submit
\Users\Admin\erum.ocx
MD5
3ddc96812e347c89f5c1fef805462e9d

SHA1
ba686d9d9caa7d35b1c9ee507863645f029a385c

SHA256
9caa54943b5d009ad41e975fc56f1b9771cdf9237fea48a11c081493a07ab0b0

SHA512
433f013db921ef0ccdc034762c36e5815d9120ee3300743891bc0c6330980e1246debcf079c188ef6b7c82803ade5643b2f653dd4d68686cf0fa68545901f941

Download Submit
memory/1028-278-0x0000000000000000-mapping.dmp

Download
memory/2344-118-0x00007FFE3E940000-0x00007FFE3E950000-memory.dmp

Filesize
64KB

Download
memory/2344-120-0x00000225B8CC0000-0x00000225B8CC2000-memory.dmp

Filesize
8KB

Download
memory/2344-121-0x00000225B8CC0000-0x00000225B8CC2000-memory.dmp

Filesize
8KB

Download
memory/2344-127-0x00007FFE3E940000-0x00007FFE3E950000-memory.dmp

Filesize
64KB

Download
memory/2344-119-0x00000225B8CC0000-0x00000225B8CC2000-memory.dmp

Filesize
8KB

Download
memory/2344-115-0x00007FFE3E940000-0x00007FFE3E950000-memory.dmp

Filesize
64KB

Download
memory/2344-117-0x00007FFE3E940000-0x00007FFE3E950000-memory.dmp

Filesize
64KB

Download
memory/2344-116-0x00007FFE3E940000-0x00007FFE3E950000-memory.dmp

Filesize
64KB

Download
memory/2872-259-0x0000000000000000-mapping.dmp

Download
memory/3572-264-0x0000000000000000-mapping.dmp

Download
memory/3864-283-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads