Malware Analysis Report

2024-12-08 02:45

Sample ID 240817-t4l1qaybpr
Target 1b6a97bac0b7919dff351d60a3452930N.exe
SHA256 4dc5805e9c93c117619231d63f0d419cb4561d6c7fcfbfd6d619bbde25eeb0a1
Tags
floxif backdoor discovery trojan upx persistence privilege_escalation
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4dc5805e9c93c117619231d63f0d419cb4561d6c7fcfbfd6d619bbde25eeb0a1

Threat Level: Known bad

The file 1b6a97bac0b7919dff351d60a3452930N.exe was found to be: Known bad.

Malicious Activity Summary

floxif backdoor discovery trojan upx persistence privilege_escalation

Floxif, Floodfix

Detects Floxif payload

Event Triggered Execution: AppInit DLLs

UPX packed file

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

ACProtect 1.3x - 1.4x DLL software

Enumerates connected drives

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-17 16:36

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-17 16:36

Reported

2024-08-17 16:38

Platform

win10v2004-20240802-en

Max time kernel

117s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe"

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

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

ACProtect 1.3x - 1.4x DLL software

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

UPX packed file

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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
File created C:\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll.tmp C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
File created \??\c:\program files\common files\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe

"C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe"

C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe

"C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4348,i,11391966286255097843,10588851088187498028,262144 --variations-seed-version --mojo-platform-channel-handle=3664 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 44.18.33.45.in-addr.arpa udp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 5isohu.com udp
US 45.33.18.44:80 www.aieov.com tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 23.58.20.217.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 150.171.28.10:443 tse1.mm.bing.net tcp
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 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp

Files

memory/1996-4-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/1996-6-0x000000000041E000-0x0000000000421000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe

MD5 951289aa81596f2a71ae683555e42593
SHA1 96546a718568ab585ed6c6fb9609ee273d08947d
SHA256 0ede7550c8b8985663e774a0bbbf7088acdce123bcdb8c61cbc037f0f8a8b525
SHA512 81599fde4bde2178329e76cebb56072f5d5b9565540f63ba9a0575bfca1536b0951c390c06283d6b8d9128de39b8c3f9a0ca45590daff447fedbebb736a3df1b

memory/2952-23-0x0000000000400000-0x00000000005FF000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RarSFX0\llftool.license

MD5 c9076d10147c59f10993459ce937a95d
SHA1 14ce07b6f9926d803d04d35bbb58ccd0f4165261
SHA256 126664769f688e46b267c9ec88c4fdbe2ed3ec072cf4046a35d67ed9bc8db54d
SHA512 6b63d4bdafcae461026d69bb63fce3713e6617f0a1036b2c886e3dd4ce02019f2b4d21a88114233daf34d08fc1b96ed235041b858f7a4cb1f502097bbc084a24

C:\Program Files (x86)\Common Files\Microsoft Shared\ink\tiptsf.dll.tmp

MD5 debaeb72b245167e7ff3d59cf3c22ce2
SHA1 6efa105fa04b60a0c1701b113e72c473f230cace
SHA256 cb13420c9b51172b1c056239a9dc2311d22b1206ad8734a9aaf6a87989c30e58
SHA512 08f86424d7d1fc394d1e91208a41877b0b452fb9007570bb8c7aee22e0ce289f0aeae3da01fb0f484d785ec8d0bd3c3c9f54fdfd7f065891060d55ae53975b19

C:\Program Files (x86)\Common Files\Microsoft Shared\ink\tiptsf.dll.tmp

MD5 3ae7d1e1d9722789cbce889689ca2f77
SHA1 fbe80592bfd62b173dcbd58f6d33be028b502f55
SHA256 10dc9096b3fe2d8e4925ff9701910ffcf413957c7eae1a10d988aa941e5c8f29
SHA512 10eeeb402a00a8110506e12bbd708b950fc50a487890fd21d1a5ce5ad55e6b6dcbeeacf9f60f5e73fe10d1a47556876ac650e7037fae0fd6bf565a4a4cbd6681

memory/1996-37-0x0000000000400000-0x00000000004BB000-memory.dmp

memory/1996-40-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1996-41-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2952-42-0x0000000000400000-0x00000000005FF000-memory.dmp

memory/1996-48-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Program Files\Common Files\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/1996-54-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1996-64-0x0000000010000000-0x0000000010030000-memory.dmp

memory/1996-66-0x0000000010000000-0x0000000010030000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-17 16:36

Reported

2024-08-17 16:38

Platform

win7-20240704-en

Max time kernel

115s

Max time network

56s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe"

Signatures

Floxif, Floodfix

backdoor trojan floxif

Detects Floxif payload

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

Event Triggered Execution: AppInit DLLs

persistence privilege_escalation

ACProtect 1.3x - 1.4x DLL software

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

UPX packed file

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

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\e: C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\symsrv.dll C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A
File created C:\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll.tmp C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A
File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll.tmp C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A
File created \??\c:\progra~1\common~1\system\symsrv.dll.000 C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe

"C:\Users\Admin\AppData\Local\Temp\1b6a97bac0b7919dff351d60a3452930N.exe"

C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe

"C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 5isohu.com udp
US 8.8.8.8:53 www.aieov.com udp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp
US 45.33.2.79:80 www.aieov.com tcp

Files

memory/2344-3-0x0000000010000000-0x0000000010030000-memory.dmp

\Program Files\Common Files\System\symsrv.dll

MD5 7574cf2c64f35161ab1292e2f532aabf
SHA1 14ba3fa927a06224dfe587014299e834def4644f
SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
SHA512 4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

memory/2344-5-0x000000000041E000-0x0000000000421000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RarSFX0\HDDLLF.exe

MD5 951289aa81596f2a71ae683555e42593
SHA1 96546a718568ab585ed6c6fb9609ee273d08947d
SHA256 0ede7550c8b8985663e774a0bbbf7088acdce123bcdb8c61cbc037f0f8a8b525
SHA512 81599fde4bde2178329e76cebb56072f5d5b9565540f63ba9a0575bfca1536b0951c390c06283d6b8d9128de39b8c3f9a0ca45590daff447fedbebb736a3df1b

memory/2792-33-0x0000000010000000-0x0000000010030000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RarSFX0\llftool.license

MD5 c9076d10147c59f10993459ce937a95d
SHA1 14ce07b6f9926d803d04d35bbb58ccd0f4165261
SHA256 126664769f688e46b267c9ec88c4fdbe2ed3ec072cf4046a35d67ed9bc8db54d
SHA512 6b63d4bdafcae461026d69bb63fce3713e6617f0a1036b2c886e3dd4ce02019f2b4d21a88114233daf34d08fc1b96ed235041b858f7a4cb1f502097bbc084a24

memory/2792-35-0x0000000000400000-0x00000000005FF000-memory.dmp

\Program Files (x86)\Common Files\microsoft shared\ink\tiptsf.dll.tmp

MD5 108d2de8bc9ad30aa7c5980cb86aa20c
SHA1 991970e8013d2353b5911488071c96c1e5fface0
SHA256 194c8536aa3332249ecd000fe2c303f713aaa6d90811266abea1bee26b6fa3c5
SHA512 921c2440a99e30b3cbb9a5129ca0b315937d3ae30a2a8ef9165ae2bf117171c51303ab24ac82ccc91ec837138519582f55c8311e8a79383d613d7c2899071c14

memory/2344-43-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-44-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-47-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-46-0x0000000000400000-0x00000000005FF000-memory.dmp

memory/2792-52-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-57-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-62-0x0000000010000000-0x0000000010030000-memory.dmp

C:\PROGRA~1\COMMON~1\System\symsrv.dll.000

MD5 1130c911bf5db4b8f7cf9b6f4b457623
SHA1 48e734c4bc1a8b5399bff4954e54b268bde9d54c
SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
SHA512 94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

memory/2792-67-0x0000000010000000-0x0000000010030000-memory.dmp

memory/2792-72-0x0000000010000000-0x0000000010030000-memory.dmp