Malware Analysis Report

2024-10-16 05:12

Sample ID 231031-rdms8abc85
Target 9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe.zip
SHA256 45093c0dc63f8296007722dc4b67fb8100f2033784307a5b463e3e7abfa76255
Tags
ammyyadmin flawedammyy trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

45093c0dc63f8296007722dc4b67fb8100f2033784307a5b463e3e7abfa76255

Threat Level: Known bad

The file 9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe.zip was found to be: Known bad.

Malicious Activity Summary

ammyyadmin flawedammyy trojan

AmmyyAdmin payload

FlawedAmmyy RAT

Ammyyadmin family

Checks computer location settings

Drops file in System32 directory

Modifies data under HKEY_USERS

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-10-31 14:04

Signatures

AmmyyAdmin payload

Description Indicator Process Target
N/A N/A N/A N/A

Ammyyadmin family

ammyyadmin

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-31 14:04

Reported

2023-10-31 14:32

Platform

win7-20231020-en

Max time kernel

151s

Max time network

162s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr = 537d56736608796e5f5e4c105953876cee9f4e53b26b C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 6151e3a5ab050eeb5f5c8892055463c47daec48c81cabe1b67fb6a1ec5a076b04708b3feffd4bc470abb20da99db9432afcea4c6d0dbe84b7718a4613f76443dd64e514a C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 rl.ammyy.com udp
NL 188.42.129.148:80 rl.ammyy.com tcp
DE 136.243.104.242:443 tcp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 714f2508d4227f74b6adacfef73815d8
SHA1 a35c8a796e4453c0c09d011284b806d25bdad04c
SHA256 a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480
SHA512 1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

C:\ProgramData\AMMYY\hr

MD5 ae755a91f460fe578758814db5165e91
SHA1 d13f9214508e1de6c478a413893773773126a612
SHA256 7005438678e6008a55d692f1a1f74542c06f2cb3377515d3941a056b218d2931
SHA512 5387afd32cd3245d71259af2ff197b5ea303baeac7b70bef6e3cf563234559c0b70ca0d6c37e4c39748e2518687fd298f6f96805b636e62f29dc4aca0c09b5b3

C:\ProgramData\AMMYY\hr3

MD5 fe2ba18140e805671140aad5cd310471
SHA1 ab3ff3d42f986c06109209ffc0190d2fe46880cf
SHA256 7a280742606335372670be6eb9737503e2d2d1ddcf6468cc335b99fd53fcf33b
SHA512 d268b82db34f4c69de4fa18a7d614ab679ebce13076a39bf78783066ecb3ac6ee8dc835c113d6922a69a7e55a39a6ddb215863b7a9ee7b5654abec94c62329bd

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-31 14:04

Reported

2023-10-31 14:33

Platform

win10v2004-20231023-en

Max time kernel

161s

Max time network

160s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 44dadb38ea0392a31db739e9e5bc37cdabd023e25345ce026d2aa07ef3fb9ac106d58549430887fcb74bab04f1253a7a1fbcf01e1c4c39d3d39da07d37937e30a6a951ae C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr = 537d56736608796d5b5b4e155253645f21c34e53b26b C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe

"C:\Users\Admin\AppData\Local\Temp\9b3f4d6a9bae4d7f9cfe45e706db8fe4baef51ae12353941e8b1532b231e6eac.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 198.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 138.201.86.20.in-addr.arpa udp
US 8.8.8.8:53 rl.ammyy.com udp
NL 188.42.129.148:80 rl.ammyy.com tcp
DE 136.243.104.235:443 tcp
US 8.8.8.8:53 148.129.42.188.in-addr.arpa udp
US 8.8.8.8:53 235.104.243.136.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 23.173.189.20.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 714f2508d4227f74b6adacfef73815d8
SHA1 a35c8a796e4453c0c09d011284b806d25bdad04c
SHA256 a5579945f23747541c0e80b79e79375d4ca44feafcd425ee9bd9302e35312480
SHA512 1171a6eac6d237053815a40c2bcc2df9f4209902d6157777377228f3b618cad50c88a9519444ed5c447cf744e4655272fb42dabb567df85b4b19b1a2f1d086d8

C:\ProgramData\AMMYY\hr

MD5 d3311efe9b561edfc212df93083b3478
SHA1 2d0eebcb95f16898e588d23a033f7d35946422b6
SHA256 fe62a8974fd82cf211cd8a66e6d77b87a6ccb7713447f6e7843cae12ce7a0818
SHA512 5a50dea6e5c46ccbd956f01b809545dd572193a460925c18c48fe0402f7eacbc92f99e715b573f5345138f236bf136745b3e90ec1a4e73f4605d07f53140e02a

C:\ProgramData\AMMYY\hr3

MD5 bee852d357f5c23f2241fa9a7c555bc9
SHA1 843a0d9a17c278ecd81e2c27aaca0ef3afd51543
SHA256 0c9772bff00700f072e94aea25ad75392a441317c92eb482f47ebb8d7c950a10
SHA512 1d5d97d492cc7c4228dd5c14a629c90a0696ad0b69c634c42b5008ce88be0feab71ae90c4211c205a2d34840a956aa813ee5ce4b5f3b6dc5655f1a279102c96b