89ef9b418bfd698c45ec3caac3067d0fb155118de909362afe9dd811f41094ec

General

Target

Calculation-1905798087-11202020.xls
Size

61KB
MD5

d2ccb220ebd1726027a94b8e55f7ea57
SHA1

8863bcc3dce81b2c0fa34c9d5c25bad443159597
SHA256

89ef9b418bfd698c45ec3caac3067d0fb155118de909362afe9dd811f41094ec
SHA512

23964e20b805c840877fd8e4c9f340971f9ea6b7db4d0237590dded6d83753bef77e31f7f2b8398eaeee800ca21f3ead5fc49f45e26d7d349e23a596fff74773

Score

10^/10

cryptone packer

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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1708	1840	rundll32.exe	EXCEL.EXE

CryptOne packer 5 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

Processes:

resource	yara_rule
C:\AutoCadest\AutoCadest2\Fiksat.dll	cryptone
\AutoCadest\AutoCadest2\Fiksat.dll	cryptone
\AutoCadest\AutoCadest2\Fiksat.dll	cryptone
\AutoCadest\AutoCadest2\Fiksat.dll	cryptone
\AutoCadest\AutoCadest2\Fiksat.dll	cryptone

Loads dropped DLL 5 IoCs

Processes:

rundll32.exeregsvr32.exe

pid process

1708 rundll32.exe
1708 rundll32.exe
1708 rundll32.exe
1708 rundll32.exe
1728 regsvr32.exe
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

980 schtasks.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

pid	process
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1728	regsvr32.exe

pid	process
980	schtasks.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1840 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

1708 rundll32.exe
1708 rundll32.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

rundll32.exe

pid process

1708 rundll32.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1840 EXCEL.EXE
1840 EXCEL.EXE
1840 EXCEL.EXE

pid	process
1840	EXCEL.EXE

pid	process
1708	rundll32.exe
1708	rundll32.exe

pid	process
1708	rundll32.exe

pid	process
1840	EXCEL.EXE
1840	EXCEL.EXE
1840	EXCEL.EXE

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

EXCEL.EXErundll32.exeexplorer.exetaskeng.exeregsvr32.exe

description	pid	process	target process
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1840 wrote to memory of 1708	1840	EXCEL.EXE	rundll32.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1708 wrote to memory of 1036	1708	rundll32.exe	explorer.exe
PID 1036 wrote to memory of 980	1036	explorer.exe	schtasks.exe
PID 1036 wrote to memory of 980	1036	explorer.exe	schtasks.exe
PID 1036 wrote to memory of 980	1036	explorer.exe	schtasks.exe
PID 1036 wrote to memory of 980	1036	explorer.exe	schtasks.exe
PID 1152 wrote to memory of 1536	1152	taskeng.exe	regsvr32.exe
PID 1152 wrote to memory of 1536	1152	taskeng.exe	regsvr32.exe
PID 1152 wrote to memory of 1536	1152	taskeng.exe	regsvr32.exe
PID 1152 wrote to memory of 1536	1152	taskeng.exe	regsvr32.exe
PID 1152 wrote to memory of 1536	1152	taskeng.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe
PID 1536 wrote to memory of 1728	1536	regsvr32.exe	regsvr32.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Calculation-1905798087-11202020.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1840

C:\Windows\SysWOW64\rundll32.exe
rundll32 C:\AutoCadest\AutoCadest2\Fiksat.dll, DllRegisterServer
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1708

C:\Windows\SysWOW64\explorer.exe
C:\Windows\SysWOW64\explorer.exe
3⤵
- Suspicious use of WriteProcessMemory
PID:1036

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\system32\schtasks.exe" /Create /RU "NT AUTHORITY\SYSTEM" /tn tpzckdmebs /tr "regsvr32.exe -s \"C:\AutoCadest\AutoCadest2\Fiksat.dll\"" /SC ONCE /Z /ST 17:47 /ET 17:59
4⤵
- Creates scheduled task(s)
PID:980

C:\Windows\system32\taskeng.exe
taskeng.exe {DF85FDCC-DD66-4DD0-A4DC-22A139B830CE} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\system32\regsvr32.exe
regsvr32.exe -s "C:\AutoCadest\AutoCadest2\Fiksat.dll"
2⤵
- Suspicious use of WriteProcessMemory
PID:1536

C:\Windows\SysWOW64\regsvr32.exe
-s "C:\AutoCadest\AutoCadest2\Fiksat.dll"
3⤵
- Loads dropped DLL
PID:1728

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\AutoCadest\AutoCadest2\Fiksat.dll
MD5
f5d343037e71550ebb729dfd806a31ac

SHA1
9031d3540d785bf863541b8569e7ebe870643f6d

SHA256
5d7f7ce899c7e8512820f92666d805bc2614ca0ec16113d13e994417b2d4aad6

SHA512
683c300b9c606daff7a20fccd9f1d3b6ba11efd21e44fde998b00713c64b58d047c0620cc389c9ea1aa70e76dfe13c0403c25e48d709069a46abc80bdae5aa96

Download Submit
C:\AutoCadest\AutoCadest2\Fiksat.dll
MD5
a6da7e4343bdf4bf26f736c813aae09e

SHA1
32a62c438d86c6c8ceac99c81745a3a03387cae9

SHA256
7d0d4aeae3c75b3e47d58a819da26ef58069df925d7dd2e75d94abe910f0e368

SHA512
2468ec16cdb93cfa8bc5cb79680f4c33cdbce6f169cfdec3523260492f6fba5860ad1accc278487c9bc680d438c4898f85e3ae9cc03d4f25921a5dd53307b1cf

Download Submit
\AutoCadest\AutoCadest2\Fiksat.dll
MD5
f5d343037e71550ebb729dfd806a31ac

SHA1
9031d3540d785bf863541b8569e7ebe870643f6d

SHA256
5d7f7ce899c7e8512820f92666d805bc2614ca0ec16113d13e994417b2d4aad6

SHA512
683c300b9c606daff7a20fccd9f1d3b6ba11efd21e44fde998b00713c64b58d047c0620cc389c9ea1aa70e76dfe13c0403c25e48d709069a46abc80bdae5aa96

Download Submit
\AutoCadest\AutoCadest2\Fiksat.dll
MD5
a6da7e4343bdf4bf26f736c813aae09e

SHA1
32a62c438d86c6c8ceac99c81745a3a03387cae9

SHA256
7d0d4aeae3c75b3e47d58a819da26ef58069df925d7dd2e75d94abe910f0e368

SHA512
2468ec16cdb93cfa8bc5cb79680f4c33cdbce6f169cfdec3523260492f6fba5860ad1accc278487c9bc680d438c4898f85e3ae9cc03d4f25921a5dd53307b1cf

Download Submit
\AutoCadest\AutoCadest2\Fiksat.dll
MD5
a6da7e4343bdf4bf26f736c813aae09e

SHA1
32a62c438d86c6c8ceac99c81745a3a03387cae9

SHA256
7d0d4aeae3c75b3e47d58a819da26ef58069df925d7dd2e75d94abe910f0e368

SHA512
2468ec16cdb93cfa8bc5cb79680f4c33cdbce6f169cfdec3523260492f6fba5860ad1accc278487c9bc680d438c4898f85e3ae9cc03d4f25921a5dd53307b1cf

Download Submit
\AutoCadest\AutoCadest2\Fiksat.dll
MD5
a6da7e4343bdf4bf26f736c813aae09e

SHA1
32a62c438d86c6c8ceac99c81745a3a03387cae9

SHA256
7d0d4aeae3c75b3e47d58a819da26ef58069df925d7dd2e75d94abe910f0e368

SHA512
2468ec16cdb93cfa8bc5cb79680f4c33cdbce6f169cfdec3523260492f6fba5860ad1accc278487c9bc680d438c4898f85e3ae9cc03d4f25921a5dd53307b1cf

Download Submit
\AutoCadest\AutoCadest2\Fiksat.dll
MD5
a6da7e4343bdf4bf26f736c813aae09e

SHA1
32a62c438d86c6c8ceac99c81745a3a03387cae9

SHA256
7d0d4aeae3c75b3e47d58a819da26ef58069df925d7dd2e75d94abe910f0e368

SHA512
2468ec16cdb93cfa8bc5cb79680f4c33cdbce6f169cfdec3523260492f6fba5860ad1accc278487c9bc680d438c4898f85e3ae9cc03d4f25921a5dd53307b1cf

Download Submit
memory/980-11-0x0000000000000000-mapping.dmp

Download
memory/1036-7-0x00000000000A0000-0x00000000000A2000-memory.dmp

Filesize
8KB

Download
memory/1036-9-0x0000000000000000-mapping.dmp

Download
memory/1036-12-0x0000000000080000-0x00000000000A0000-memory.dmp

Filesize
128KB

Download
memory/1536-13-0x0000000000000000-mapping.dmp

Download
memory/1708-10-0x0000000000180000-0x00000000001A0000-memory.dmp

Filesize
128KB

Download
memory/1708-8-0x0000000000240000-0x0000000000260000-memory.dmp

Filesize
128KB

Download
memory/1708-1-0x0000000000000000-mapping.dmp

Download
memory/1728-15-0x0000000000000000-mapping.dmp

Download
memory/1992-0-0x000007FEF6670000-0x000007FEF68EA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads