817e81c92be33961734de8200c6aecc57b9ee2e0049e1a8751a0ad42c986b91b

General

Target

817e81c92be33961734de8200c6aecc57b9ee2e0049e1a8751a0ad42c986b91bN.dll
Size

76KB
MD5

1cf880c5846dc3131ee2a9dbb2b59600
SHA1

85cf56cf42dafc694b6e1b7750e5d5b55c10a6f2
SHA256

817e81c92be33961734de8200c6aecc57b9ee2e0049e1a8751a0ad42c986b91b
SHA512

97d91f105ef938a3f66d181ccf68119cce93fe85fdb3a165764ba855802e051074bc68b952ffa3f95ec0ec0dc71f63bbde92252f797606250c86cf5796ae11ac
SSDEEP

1536:YjV8y93KQpFQmPLRk7G50zy/riF12jvRyo0hQk7ZBiRYlz6:c8y93KQjy7G55riF1cMo03nCj

Score

8^/10

discovery persistence privilege_escalation upx

Malware Config

Signatures

Downloads MZ/PE file 2 IoCs

flow	pid	Process
32	1180	Process not Found
52	208	Process not Found

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	MicrosoftEdgeUpdate.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	MicrosoftEdgeUpdate.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	MicrosoftEdgeUpdate.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	MicrosoftEdgeUpdate.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2276-0-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/2276-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4944-6-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4944-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4944	MicrosoftEdgeUpdate.exe

Modifies data under HKEY_USERS 8 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	MicrosoftEdgeUpdate.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	MicrosoftEdgeUpdate.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	MicrosoftEdgeUpdate.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	MicrosoftEdgeUpdate.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	MicrosoftEdgeUpdate.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	MicrosoftEdgeUpdate.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	MicrosoftEdgeUpdate.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2276	rundll32.exe
2276	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2276	rundll32.exe
Token: SeDebugPrivilege	4944	MicrosoftEdgeUpdate.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2540 wrote to memory of 2276	2540	rundll32.exe	86
PID 2540 wrote to memory of 2276	2540	rundll32.exe	86
PID 2540 wrote to memory of 2276	2540	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\817e81c92be33961734de8200c6aecc57b9ee2e0049e1a8751a0ad42c986b91bN.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2540
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\817e81c92be33961734de8200c6aecc57b9ee2e0049e1a8751a0ad42c986b91bN.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2276

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIxIiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDU5ODUiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxODQ0NDQzNjAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0NzU1NzkwMzM0Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:4944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2276-0-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2276-2-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-3-0x00000000762E5000-0x00000000762E6000-memory.dmp

Filesize
4KB

Download
memory/4944-5-0x00000000762D0000-0x0000000076333000-memory.dmp

Filesize
396KB

Download
memory/4944-6-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4944-9-0x00000000762D0000-0x0000000076333000-memory.dmp

Filesize
396KB

Download

Analysis

Sharing