8668458c8a828b9a801383c149582c15db640d4eb5df60702db207dd2de26f25

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
05/11/2023, 07:35

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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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350690463-3549324357-1323838019-1000\Control Panel\International\Geo\Nation	NEAS.ac9958e4a582ae514e4487ec9d273350.exe

Executes dropped EXE 1 IoCs

pid	Process
1776	taskserf.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1672-0-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral2/files/0x000b000000022da9-5.dat	upx
behavioral2/files/0x000b000000022da9-9.dat	upx
behavioral2/files/0x000b000000022da9-10.dat	upx
behavioral2/memory/1672-11-0x0000000000400000-0x000000000043B000-memory.dmp	upx
behavioral2/memory/1776-12-0x0000000000400000-0x000000000043B000-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\USER\S-1-5-21-3350690463-3549324357-1323838019-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskserf.exe = "c:\\users\\admin\\appdata\\local\\temp\\taskserf.exe"	NEAS.ac9958e4a582ae514e4487ec9d273350.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\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
3844	1672	WerFault.exe	81

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1776	taskserf.exe
1776	taskserf.exe

Suspicious use of SetWindowsHookEx 7 IoCs

pid	Process
1672	NEAS.ac9958e4a582ae514e4487ec9d273350.exe
1776	taskserf.exe
1776	taskserf.exe
1776	taskserf.exe
1776	taskserf.exe
1776	taskserf.exe
1776	taskserf.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1776	1672	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	86
PID 1672 wrote to memory of 1776	1672	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	86
PID 1672 wrote to memory of 1776	1672	NEAS.ac9958e4a582ae514e4487ec9d273350.exe	86

C:\Users\Admin\AppData\Local\Temp\NEAS.ac9958e4a582ae514e4487ec9d273350.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.ac9958e4a582ae514e4487ec9d273350.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1672
- 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:1776
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1672 -s 944
  2⤵
  - Program crash
  PID:3844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1672 -ip 1672
1⤵
PID:448

Network

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

Query Registry

T1012

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
981849d4393da63e630a6e25d018b2cd

SHA1
3cafa0473ac3edf3496644e89b6a8035a321f9ba

SHA256
1b9bed4ab3e463579e80e019102705289bb6e61d7e9c7b14aadf9d41d6688a5a

SHA512
df8b2e8a5904d5bcc74080d014a6c743e5ce6df32c9accb1ab51f1f33a52de7016397c341d17a35d2ea9739c35b0320965e38e8a31e8943b74aa7795a6441300

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

Filesize
228KB

MD5
981849d4393da63e630a6e25d018b2cd

SHA1
3cafa0473ac3edf3496644e89b6a8035a321f9ba

SHA256
1b9bed4ab3e463579e80e019102705289bb6e61d7e9c7b14aadf9d41d6688a5a

SHA512
df8b2e8a5904d5bcc74080d014a6c743e5ce6df32c9accb1ab51f1f33a52de7016397c341d17a35d2ea9739c35b0320965e38e8a31e8943b74aa7795a6441300

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

Filesize
228KB

MD5
981849d4393da63e630a6e25d018b2cd

SHA1
3cafa0473ac3edf3496644e89b6a8035a321f9ba

SHA256
1b9bed4ab3e463579e80e019102705289bb6e61d7e9c7b14aadf9d41d6688a5a

SHA512
df8b2e8a5904d5bcc74080d014a6c743e5ce6df32c9accb1ab51f1f33a52de7016397c341d17a35d2ea9739c35b0320965e38e8a31e8943b74aa7795a6441300

Download Submit
memory/1672-0-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1672-11-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1776-12-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download