f22fdab0a86dda1291d49f719577c25c29d0645bc70f69ab7e7af2d1a847fd8e

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
19/08/2024, 01:48

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General

Target

20d15ddc7fc533320470adb46b29a0c0N.exe
Size

55KB
MD5

20d15ddc7fc533320470adb46b29a0c0
SHA1

691982118324ce183649863e3031f5fcc998c703
SHA256

f22fdab0a86dda1291d49f719577c25c29d0645bc70f69ab7e7af2d1a847fd8e
SHA512

78b197060724bb962473bd4ba00db6253dd86501bbd16bdd0f41c4eab59792fc07393fbf15ae14addbf21b272e3d38bc33cc766f9aa3441ec6ad8905a3bba60b
SSDEEP

1536:hvQoLHjw2iWPKMvw71/RLyX3NvvvZeee5w:hv5Ls27BIJ/RLyX3HeeeS

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1412	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2776	ayahost.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\ayahost.exe	20d15ddc7fc533320470adb46b29a0c0N.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	20d15ddc7fc533320470adb46b29a0c0N.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	20d15ddc7fc533320470adb46b29a0c0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ayahost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ayahost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	ayahost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1628	20d15ddc7fc533320470adb46b29a0c0N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 1412	1628	20d15ddc7fc533320470adb46b29a0c0N.exe	31
PID 1628 wrote to memory of 1412	1628	20d15ddc7fc533320470adb46b29a0c0N.exe	31
PID 1628 wrote to memory of 1412	1628	20d15ddc7fc533320470adb46b29a0c0N.exe	31
PID 1628 wrote to memory of 1412	1628	20d15ddc7fc533320470adb46b29a0c0N.exe	31

C:\Users\Admin\AppData\Local\Temp\20d15ddc7fc533320470adb46b29a0c0N.exe
"C:\Users\Admin\AppData\Local\Temp\20d15ddc7fc533320470adb46b29a0c0N.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\20D15D~1.EXE > nul
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  PID:1412

C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:2776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\debug\ayahost.exe

Filesize
55KB

MD5
41b8b38ff8d1c486e8150f911b74a1ce

SHA1
2a887055618c96d9d6f15a2198f51a830f20f30e

SHA256
41f4c2d14bd0fe753fd26fc8d4b40601c87b7ac1cc8e5bc08aa3cf6c7b51f010

SHA512
48d98dad362b0400c1452af55d379e8157077e447fa8b109d44a3b91fd191b39404510e67aa698460ab34b1072e6eba875c0f54af0a0bef553284882e9e70920

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