8668458c8a828b9a801383c149582c15db640d4eb5df60702db207dd2de26f25

Analysis

max time kernel
144s
max time network
143s
platform
windows7_x64
resource
win7-20231020-en
resource tags

arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
submitted
05/11/2023, 07:35 UTC

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General

Target

NEAS.ac9958e4a582ae514e4487ec9d273350.exe
Size

228KB
MD5

ac9958e4a582ae514e4487ec9d273350
SHA1

a15765543d2c078975823fcebe88cd4b763ad76d
SHA256

8668458c8a828b9a801383c149582c15db640d4eb5df60702db207dd2de26f25
SHA512

aa512f6d6e898b7a28a5d4130efb3e8e9028dac9698b7b86b01fa0c72af399a10e0341c90123a9692b51dd22b7b2942692cd0b67d2640c4e9b508f7292dd57e8
SSDEEP

3072:tIgcTTjAq4wbnBjvxc8287Gw8OUtyjMhTdglu4SUvmre:teAq4wb97KyjsTGxvn

Score

7^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3056	taskserf.exe

Loads dropped DLL 2 IoCs

pid	Process
2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe
2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2316-0-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/files/0x000e00000000e647-5.dat	upx
behavioral1/files/0x000e00000000e647-6.dat	upx
behavioral1/files/0x000e00000000e647-7.dat	upx
behavioral1/memory/3056-13-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/files/0x000e00000000e647-12.dat	upx
behavioral1/files/0x000e00000000e647-14.dat	upx
behavioral1/memory/2316-15-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral1/memory/3056-18-0x0000000000400000-0x000000000043B000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\taskserf.exe = "c:\\users\\admin\\appdata\\local\\temp\\taskserf.exe"	NEAS.ac9958e4a582ae514e4487ec9d273350.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2952504676-3105837840-1406404655-1000\Software\Microsoft\Windows\CurrentVersion\Run\taskserf.exe = "c:\\users\\admin\\appdata\\local\\temp\\taskserf.exe"	NEAS.ac9958e4a582ae514e4487ec9d273350.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3028	2316	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3056	taskserf.exe

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe
3056	taskserf.exe
3056	taskserf.exe
3056	taskserf.exe
3056	taskserf.exe
3056	taskserf.exe
3056	taskserf.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 3056	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	28
PID 2316 wrote to memory of 3056	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	28
PID 2316 wrote to memory of 3056	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	28
PID 2316 wrote to memory of 3056	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	28
PID 2316 wrote to memory of 3028	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	29
PID 2316 wrote to memory of 3028	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	29
PID 2316 wrote to memory of 3028	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	29
PID 2316 wrote to memory of 3028	2316	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	29

C:\Users\Admin\AppData\Local\Temp\NEAS.ac9958e4a582ae514e4487ec9d273350.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.ac9958e4a582ae514e4487ec9d273350.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\appdata\local\temp\taskserf.exe
  "C:\Users\Admin\appdata\local\temp\taskserf.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:3056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2316 -s 492
  2⤵
  - Program crash
  PID:3028

Network

DNS

myunknownz.ddns.net

taskserf.exe

Remote address:

8.8.8.8:53

Request

myunknownz.ddns.net

IN A

Response

myunknownz.ddns.net

IN A

100.117.11.2
DNS

myunknownz.ddns.net

taskserf.exe

Remote address:

8.8.8.8:53

Request

myunknownz.ddns.net

IN A

Response

myunknownz.ddns.net

IN A

100.117.11.2
DNS

myunknownz.ddns.net

taskserf.exe

Remote address:

8.8.8.8:53

Request

myunknownz.ddns.net

IN A

Response

myunknownz.ddns.net

IN A

100.117.11.2

100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26024

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26024

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26024

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26024

myunknownz.ddns.net

taskserf.exe

152 B
3
100.117.11.2:26025

myunknownz.ddns.net

taskserf.exe

152 B
3

8.8.8.8:53

myunknownz.ddns.net

dns

taskserf.exe

65 B
81 B
1
1

DNS Request

myunknownz.ddns.net

DNS Response

100.117.11.2
8.8.8.8:53

myunknownz.ddns.net

dns

taskserf.exe

65 B
81 B
1
1

DNS Request

myunknownz.ddns.net

DNS Response

100.117.11.2
8.8.8.8:53

myunknownz.ddns.net

dns

taskserf.exe

65 B
81 B
1
1

DNS Request

myunknownz.ddns.net

DNS Response

100.117.11.2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\taskserf.exe

Filesize
228KB

MD5
92243b455d362bc982e08e5c68739933

SHA1
8fb624e123a69fd436cd68951e33f42dd7de4bcb

SHA256
a39847886fe37f112882bcba96f084db8f17b6ad089f63233961a7d1833c91df

SHA512
917dbc1c330d97317bb37cfd6b560d016eada3947086f2f010b20c1f863e804cfa0bac82eb9bdf4bb6b44fa4a8bc182b3f879dc3e35a18805243aa43bb02aed7

Download Submit
C:\Users\Admin\AppData\Local\Temp\taskserf.exe

Filesize
228KB

MD5
92243b455d362bc982e08e5c68739933

SHA1
8fb624e123a69fd436cd68951e33f42dd7de4bcb

SHA256
a39847886fe37f112882bcba96f084db8f17b6ad089f63233961a7d1833c91df

SHA512
917dbc1c330d97317bb37cfd6b560d016eada3947086f2f010b20c1f863e804cfa0bac82eb9bdf4bb6b44fa4a8bc182b3f879dc3e35a18805243aa43bb02aed7

Download Submit
C:\Users\Admin\appdata\local\temp\taskserf.exe

Filesize
228KB

MD5
92243b455d362bc982e08e5c68739933

SHA1
8fb624e123a69fd436cd68951e33f42dd7de4bcb

SHA256
a39847886fe37f112882bcba96f084db8f17b6ad089f63233961a7d1833c91df

SHA512
917dbc1c330d97317bb37cfd6b560d016eada3947086f2f010b20c1f863e804cfa0bac82eb9bdf4bb6b44fa4a8bc182b3f879dc3e35a18805243aa43bb02aed7

Download Submit
\Users\Admin\AppData\Local\Temp\taskserf.exe

Filesize
228KB

MD5
92243b455d362bc982e08e5c68739933

SHA1
8fb624e123a69fd436cd68951e33f42dd7de4bcb

SHA256
a39847886fe37f112882bcba96f084db8f17b6ad089f63233961a7d1833c91df

SHA512
917dbc1c330d97317bb37cfd6b560d016eada3947086f2f010b20c1f863e804cfa0bac82eb9bdf4bb6b44fa4a8bc182b3f879dc3e35a18805243aa43bb02aed7

Download Submit
\Users\Admin\AppData\Local\Temp\taskserf.exe

Filesize
228KB

MD5
92243b455d362bc982e08e5c68739933

SHA1
8fb624e123a69fd436cd68951e33f42dd7de4bcb

SHA256
a39847886fe37f112882bcba96f084db8f17b6ad089f63233961a7d1833c91df

SHA512
917dbc1c330d97317bb37cfd6b560d016eada3947086f2f010b20c1f863e804cfa0bac82eb9bdf4bb6b44fa4a8bc182b3f879dc3e35a18805243aa43bb02aed7

Download Submit
memory/2316-0-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/2316-11-0x00000000025E0000-0x000000000261B000-memory.dmp

Filesize
236KB

Download
memory/2316-15-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/2316-16-0x00000000025E0000-0x000000000261B000-memory.dmp

Filesize
236KB

Download
memory/2316-17-0x00000000025E0000-0x000000000261B000-memory.dmp

Filesize
236KB

Download
memory/3056-13-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/3056-18-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

DNS Request

DNS Response

DNS Request

DNS Response

DNS Request

DNS Response

MITRE ATT&CK Enterprise v15

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