5e682f78754c6e34d56edcec09bf9441813bc3dc08be0e8270d1df43790057aa

General

Target

Cancellation_Letter_1478817952-02242021.xls
Size

144KB
MD5

38e8d1a8dfe9c39a1369f184d018a3ad
SHA1

bfdd5fdbbd3864df904665a4d2817c9c9232c6b1
SHA256

cfac4de5500a9183b6e9763dd08559184630fa5629e9b7b75872092dac199676
SHA512

a2c1817170c42f8c735e1921bacdd601f3594db7c23bd2bd4c9d8b9e203843db561ff2a050dfe8d2a637491b8903651c1dca50b060928d40b174456997f03912

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 10 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exerundll32.exerundll32.exerundll32.exerundll32.exerundll32.exerundll32.exerundll32.exerundll32.exerundll32.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	632	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1160	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3176	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2524	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2832	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1272	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2132	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3960	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4080	1032	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3952	1032	rundll32.exe	EXCEL.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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
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

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

1032 EXCEL.EXE

Suspicious use of SetWindowsHookEx 25 IoCs

Processes:

EXCEL.EXE

pid	process
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE
1032	EXCEL.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1032 wrote to memory of 632	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 632	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1160	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1160	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3176	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3176	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2524	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2524	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2832	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2832	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1272	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 1272	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2132	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 2132	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3960	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3960	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 4080	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 4080	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3952	1032	EXCEL.EXE	rundll32.exe
PID 1032 wrote to memory of 3952	1032	EXCEL.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\Cancellation_Letter_1478817952-02242021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:632

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1160

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3176

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2524

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2832

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1272

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2132

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3960

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:4080

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3952

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/632-7-0x0000000000000000-mapping.dmp

Download
memory/1032-2-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-3-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-4-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1032-5-0x00007FFC34F80000-0x00007FFC355B7000-memory.dmp

Filesize
6.2MB

Download
memory/1032-6-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmp

Filesize
64KB

Download
memory/1160-8-0x0000000000000000-mapping.dmp

Download
memory/1272-12-0x0000000000000000-mapping.dmp

Download
memory/2132-13-0x0000000000000000-mapping.dmp

Download
memory/2524-10-0x0000000000000000-mapping.dmp

Download
memory/2832-11-0x0000000000000000-mapping.dmp

Download
memory/3176-9-0x0000000000000000-mapping.dmp

Download
memory/3952-16-0x0000000000000000-mapping.dmp

Download
memory/3960-14-0x0000000000000000-mapping.dmp

Download
memory/4080-15-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads