d638abd2e0c80c8ace2de8dc015b3a208916e6c4bd6a081a6fc2c09f8a77bc15

Analysis

max time kernel
4294205s
max time network
153s
platform
windows7_x64
resource
win7-20220310-en
submitted
23-03-2022 21:00

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General

Target

6.exe

Score

10^/10

evasion persistence suricata trojan

Malware Config

Signatures

Process spawned unexpected child process 7 IoCs

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

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

description	pid	pid_target	process
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	964	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1600	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	912	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1176	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2024	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1136	1788	schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	592	1788	schtasks.exe

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
suricata: ET MALWARE DCRAT Activity (GET)
suricata: ET MALWARE DCRAT Activity (GET)
suricata
Executes dropped EXE 1 IoCs

Processes:

spoolsv.exe

pid process

1984 spoolsv.exe

pid	process
1984	spoolsv.exe

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

6.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\6 = "\"C:\\Windows\\IME\\de-DE\\6.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\SyncCenter\\csrss.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\PerfLogs\\Admin\\winlogon.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\WiaExtensionHost64\\services.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\ProgramData\\Favorites\\spoolsv.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Windows\\System32\\capisp\\wininit.exe\""	6.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\6 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\10\\6.exe\""	6.exe

Checks whether UAC is enabled 1 TTPs 4 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

6.exespoolsv.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	6.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	spoolsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	spoolsv.exe

Drops file in System32 directory 6 IoCs

Processes:

6.exe

description	ioc	process
File created	C:\Windows\System32\SyncCenter\886983d96e3d3e31032c679b2d4ea91b6c05afef	6.exe
File created	C:\Windows\System32\WiaExtensionHost64\services.exe	6.exe
File created	C:\Windows\System32\WiaExtensionHost64\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	6.exe
File created	C:\Windows\System32\capisp\wininit.exe	6.exe
File created	C:\Windows\System32\capisp\560854153607923c4c5f107085a7db67be01f252	6.exe
File created	C:\Windows\System32\SyncCenter\csrss.exe	6.exe

Drops file in Windows directory 2 IoCs

Processes:

6.exe

description ioc process

File created C:\Windows\IME\de-DE\6.exe 6.exe
File created C:\Windows\IME\de-DE\b44893ff9240c06c0c21dd42f0c18af10d965bf4 6.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 7 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exeschtasks.exe

pid process

964 schtasks.exe
1600 schtasks.exe
912 schtasks.exe
1176 schtasks.exe
2024 schtasks.exe
1136 schtasks.exe
592 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

6.exespoolsv.exe

pid process

1636 6.exe
1984 spoolsv.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

6.exespoolsv.exe

description pid process

Token: SeDebugPrivilege 1636 6.exe
Token: SeDebugPrivilege 1984 spoolsv.exe

description	ioc	process
File created	C:\Windows\IME\de-DE\6.exe	6.exe
File created	C:\Windows\IME\de-DE\b44893ff9240c06c0c21dd42f0c18af10d965bf4	6.exe

pid	process
964	schtasks.exe
1600	schtasks.exe
912	schtasks.exe
1176	schtasks.exe
2024	schtasks.exe
1136	schtasks.exe
592	schtasks.exe

pid	process
1636	6.exe
1984	spoolsv.exe

description	pid	process
Token: SeDebugPrivilege	1636	6.exe
Token: SeDebugPrivilege	1984	spoolsv.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

6.exe

description	pid	process	target process
PID 1636 wrote to memory of 1984	1636	6.exe	spoolsv.exe
PID 1636 wrote to memory of 1984	1636	6.exe	spoolsv.exe
PID 1636 wrote to memory of 1984	1636	6.exe	spoolsv.exe

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

Processes:

spoolsv.exe6.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	spoolsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	6.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	6.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	6.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	spoolsv.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	spoolsv.exe

C:\Users\Admin\AppData\Local\Temp\6.exe
"C:\Users\Admin\AppData\Local\Temp\6.exe"
1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1636

C:\ProgramData\Favorites\spoolsv.exe
"C:\ProgramData\Favorites\spoolsv.exe"
2⤵
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
PID:1984

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\ProgramData\Favorites\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\capisp\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "6" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\10\6.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "6" /sc ONLOGON /tr "'C:\Windows\IME\de-DE\6.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1176

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\SyncCenter\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2024

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\PerfLogs\Admin\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1136

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\WiaExtensionHost64\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:592

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Bypass User Account Control

T1088

Scheduled Task

T1053

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\Favorites\spoolsv.exe
Filesize
564KB

MD5
748a4bea8c0624a4c7a69f67263e0839

SHA1
6955b7d516df38992ac6bff9d0b0f5df150df859

SHA256
220d8f8ff82d413c81bd02dfa001e1c478e8fbea44bad24f21b3a5284e15632e

SHA512
5fcdfddce3cc2e636001ed08c5f2f7590aadaa37c091f7ba94e519d298e284362721f1859c6ffbf064ae23e05d4e0e9754b515396812fbe9f9028497396799fd

Download Submit
C:\Users\Public\Favorites\spoolsv.exe
Filesize
564KB

MD5
748a4bea8c0624a4c7a69f67263e0839

SHA1
6955b7d516df38992ac6bff9d0b0f5df150df859

SHA256
220d8f8ff82d413c81bd02dfa001e1c478e8fbea44bad24f21b3a5284e15632e

SHA512
5fcdfddce3cc2e636001ed08c5f2f7590aadaa37c091f7ba94e519d298e284362721f1859c6ffbf064ae23e05d4e0e9754b515396812fbe9f9028497396799fd

Download Submit
memory/1636-54-0x00000000001D0000-0x0000000000264000-memory.dmp

Filesize
592KB

Download
memory/1636-55-0x000000001B000000-0x000000001B002000-memory.dmp

Filesize
8KB

Download
memory/1636-56-0x00000000003E0000-0x00000000003EC000-memory.dmp

Filesize
48KB

Download
memory/1636-57-0x00000000003F0000-0x00000000003FA000-memory.dmp

Filesize
40KB

Download
memory/1636-58-0x0000000000420000-0x000000000042C000-memory.dmp

Filesize
48KB

Download
memory/1636-59-0x0000000000410000-0x000000000041C000-memory.dmp

Filesize
48KB

Download
memory/1984-60-0x0000000000000000-mapping.dmp

Download
memory/1984-63-0x00000000002E0000-0x0000000000374000-memory.dmp

Filesize
592KB

Download
memory/1984-64-0x000000001B060000-0x000000001B062000-memory.dmp

Filesize
8KB

Download