f403e5db7055c16c5608a7c5c5e8d72541f88a83720b84f6ee2a8ed7212f75a8

Analysis

max time kernel
138s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-en-20220112
submitted
20-01-2022 18:11

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General

Target

7zS850A099E/61e74fd2175cb_Tue23956aa60ed.exe
Size

312KB
MD5

e5a07be6c167ccf605ba9e6a0608e141
SHA1

d50547756f224ebaf38efc1b2e5134b6caa272ba
SHA256

449fb91c32af2d722f418ab4ee0747d0b7457ba69496b2d8f894e6045d69e1e4
SHA512

b66a844121bd42707aab3200f5e2a01765bd00ea3b958e09baeca9cd6856005a17474e72a9635184046d92205be3baf6677951fd8eb42ccebe687efb8b30f13b

Score

10^/10

persistence

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

rundll32.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1016	1812	rundll32.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4028	1812	rundll32.exe

Suspicious use of NtCreateProcessExOtherParentProcess 2 IoCs

Processes:

WerFault.exeWerFault.exe

description pid process target process

PID 3888 created 828 3888 WerFault.exe rundll32.exe
PID 3804 created 3772 3804 WerFault.exe rundll32.exe
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

description	pid	process	target process
PID 3888 created 828	3888	WerFault.exe	rundll32.exe
PID 3804 created 3772	3804	WerFault.exe	rundll32.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

61e74fd2175cb_Tue23956aa60ed.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation	61e74fd2175cb_Tue23956aa60ed.exe

Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

828 rundll32.exe
3772 rundll32.exe
Drops file in Windows directory 1 IoCs

Processes:

WerFault.exe

description ioc process

File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp WerFault.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

692 3772 WerFault.exe rundll32.exe
1300 828 WerFault.exe rundll32.exe

pid	process
828	rundll32.exe
3772	rundll32.exe

description	ioc	process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	WerFault.exe

pid	pid_target	process	target process
692	3772	WerFault.exe	rundll32.exe
1300	828	WerFault.exe	rundll32.exe

Checks processor information in registry 2 TTPs 6 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exeWerFault.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

WerFault.exeWerFault.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.exe

Modifies data under HKEY_USERS 41 IoCs

Processes:

WaaSMedicAgent.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	WaaSMedicAgent.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs	WaaSMedicAgent.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

Processes:

description	flow	ioc
HTTP User-Agent header	39	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	40	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

WerFault.exeWerFault.exe

pid process

1300 WerFault.exe
1300 WerFault.exe
692 WerFault.exe
692 WerFault.exe

pid	process
1300	WerFault.exe
1300	WerFault.exe
692	WerFault.exe
692	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

WerFault.exeWerFault.exe

description	pid	process
Token: SeRestorePrivilege	692	WerFault.exe
Token: SeBackupPrivilege	692	WerFault.exe
Token: SeRestorePrivilege	1300	WerFault.exe
Token: SeBackupPrivilege	1300	WerFault.exe
Token: SeBackupPrivilege	1300	WerFault.exe

Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

61e74fd2175cb_Tue23956aa60ed.exe61e74fd2175cb_Tue23956aa60ed.exe61e74fd2175cb_Tue23956aa60ed.exe

pid	process
1064	61e74fd2175cb_Tue23956aa60ed.exe
1064	61e74fd2175cb_Tue23956aa60ed.exe
2240	61e74fd2175cb_Tue23956aa60ed.exe
2240	61e74fd2175cb_Tue23956aa60ed.exe
1888	61e74fd2175cb_Tue23956aa60ed.exe
1888	61e74fd2175cb_Tue23956aa60ed.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

61e74fd2175cb_Tue23956aa60ed.exerundll32.exerundll32.exeWerFault.exeWerFault.exe

description	pid	process	target process
PID 1064 wrote to memory of 2240	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 1064 wrote to memory of 2240	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 1064 wrote to memory of 2240	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 1064 wrote to memory of 1888	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 1064 wrote to memory of 1888	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 1064 wrote to memory of 1888	1064	61e74fd2175cb_Tue23956aa60ed.exe	61e74fd2175cb_Tue23956aa60ed.exe
PID 4028 wrote to memory of 3772	4028	rundll32.exe	rundll32.exe
PID 4028 wrote to memory of 3772	4028	rundll32.exe	rundll32.exe
PID 4028 wrote to memory of 3772	4028	rundll32.exe	rundll32.exe
PID 1016 wrote to memory of 828	1016	rundll32.exe	rundll32.exe
PID 1016 wrote to memory of 828	1016	rundll32.exe	rundll32.exe
PID 1016 wrote to memory of 828	1016	rundll32.exe	rundll32.exe
PID 3888 wrote to memory of 828	3888	WerFault.exe	rundll32.exe
PID 3888 wrote to memory of 828	3888	WerFault.exe	rundll32.exe
PID 3804 wrote to memory of 3772	3804	WerFault.exe	rundll32.exe
PID 3804 wrote to memory of 3772	3804	WerFault.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe
"C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1064

C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe
"C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe" -a
2⤵
- Suspicious use of SetWindowsHookEx
PID:2240

C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe
"C:\Users\Admin\AppData\Local\Temp\7zS850A099E\61e74fd2175cb_Tue23956aa60ed.exe" -a
2⤵
- Suspicious use of SetWindowsHookEx
PID:1888

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 6b75b5e120efb18bf363a734cec961f4 J6v8hJj9zU2k/m5PH3DSew.0.1.0.0.0
1⤵
- Modifies data under HKEY_USERS
PID:2488

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",global
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:1016

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",global
2⤵
- Loads dropped DLL
PID:828

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 828 -s 604
3⤵
- Drops file in Windows directory
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1300

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",global
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:4028

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",global
2⤵
- Loads dropped DLL
PID:3772

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3772 -s 600
3⤵
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:692

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 828 -ip 828
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3772 -ip 3772
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3804

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:3064

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\db.dat
MD5
4d0511c6b3fced567deda83f81c485fc

SHA1
a76a47f933f27e65fa3b6568c37a15b0dbc01b24

SHA256
27f01767425e7e0c2b00e364197be6efce57a0a9d14915fed5b18c74b4ed4f4a

SHA512
f5c778c316a9df4c42866cacad962682cd7db99b97e003841865003c162570eabcf88d922e16d1e9fdad0d40702c34c87c3a7e940f297711823063126de1e28b

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dat
MD5
4d0511c6b3fced567deda83f81c485fc

SHA1
a76a47f933f27e65fa3b6568c37a15b0dbc01b24

SHA256
27f01767425e7e0c2b00e364197be6efce57a0a9d14915fed5b18c74b4ed4f4a

SHA512
f5c778c316a9df4c42866cacad962682cd7db99b97e003841865003c162570eabcf88d922e16d1e9fdad0d40702c34c87c3a7e940f297711823063126de1e28b

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll
MD5
bdb8b28711203da9fe039a930a69334d

SHA1
e23c19dbf7031fb94d23bb8256fd7008503e699b

SHA256
73883debf40f04a57103800651142e8232bfc67f9e3535ad25f7c2687143fe65

SHA512
4cc5397b4f6505557533f2d8d9a55c793e00e4c2687ac3710f4a3ee2439365597d973d0199661714a727f37acaf5548e6ccc747fde40794ea2c3879dd70e87a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll
MD5
bdb8b28711203da9fe039a930a69334d

SHA1
e23c19dbf7031fb94d23bb8256fd7008503e699b

SHA256
73883debf40f04a57103800651142e8232bfc67f9e3535ad25f7c2687143fe65

SHA512
4cc5397b4f6505557533f2d8d9a55c793e00e4c2687ac3710f4a3ee2439365597d973d0199661714a727f37acaf5548e6ccc747fde40794ea2c3879dd70e87a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll
MD5
bdb8b28711203da9fe039a930a69334d

SHA1
e23c19dbf7031fb94d23bb8256fd7008503e699b

SHA256
73883debf40f04a57103800651142e8232bfc67f9e3535ad25f7c2687143fe65

SHA512
4cc5397b4f6505557533f2d8d9a55c793e00e4c2687ac3710f4a3ee2439365597d973d0199661714a727f37acaf5548e6ccc747fde40794ea2c3879dd70e87a9

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll
MD5
bdb8b28711203da9fe039a930a69334d

SHA1
e23c19dbf7031fb94d23bb8256fd7008503e699b

SHA256
73883debf40f04a57103800651142e8232bfc67f9e3535ad25f7c2687143fe65

SHA512
4cc5397b4f6505557533f2d8d9a55c793e00e4c2687ac3710f4a3ee2439365597d973d0199661714a727f37acaf5548e6ccc747fde40794ea2c3879dd70e87a9

Download Submit