floxif | 379a076f2f1971290d9585f2847c14db67cfcee82b8a318b9b7516ecc5f295f4

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2024 12:34

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General

Target

2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
Size

2.7MB
MD5

aef2bfae94193a904297ac137d9988a5
SHA1

668594b00a333fca4002f716311cd5aa4201d99f
SHA256

379a076f2f1971290d9585f2847c14db67cfcee82b8a318b9b7516ecc5f295f4
SHA512

f740415c48cf003aef77852c3aeed485bbbfb15a37f65d0037529eab03a15c727333af4f7a4e4b8ea06781cbcb5fb4a62c6531a00772ceba9bcec4a65f28dfbd
SSDEEP

49152:VTD7Jvx66J9507uEiVw6kT+cT+0FVA7ri/7xznSqur7bT9iAvIyD94OeDD7lrZ+E:VrJ/9505S0pVLtFAZwuLcmhWibDA

Score

10^/10

floxif backdoor discovery evasion persistence privilege_escalation trojan upx

Malware Config

Signatures

Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
backdoor trojan floxif

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x00090000000233b1-1.dat	floxif

Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
persistence privilege_escalation

AppInit DLLs
T1546.010

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x00090000000233b1-1.dat	acprotect

Checks computer location settings 2 TTPs 2 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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	Au_.exe

Executes dropped EXE 2 IoCs

pid	Process
1188	Au_.exe
3284	Au_.exe

Loads dropped DLL 4 IoCs

pid	Process
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
1188	Au_.exe
3284	Au_.exe
3284	Au_.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00090000000233b1-1.dat	upx
behavioral2/memory/468-2-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1188-38-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/468-34-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3284-57-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1188-190-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3284-195-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3284-203-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3284-211-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/3284-235-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Au_.exe

Enumerates connected drives 3 TTPs 2 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\e:	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
File opened (read-only)	\??\e:	Au_.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
File created	\??\c:\progra~1\common~1\system\symsrv.dll.000	Au_.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	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Au_.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Au_.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
1188	Au_.exe
1188	Au_.exe
3284	Au_.exe
3284	Au_.exe
1188	Au_.exe
1188	Au_.exe
1188	Au_.exe
1188	Au_.exe
1188	Au_.exe
1188	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe
3284	Au_.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1188	Au_.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
Token: SeDebugPrivilege	1188	Au_.exe
Token: SeDebugPrivilege	3284	Au_.exe
Token: SeDebugPrivilege	1188	Au_.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1188	Au_.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 468 wrote to memory of 1188	468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	86
PID 468 wrote to memory of 1188	468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	86
PID 468 wrote to memory of 1188	468	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	86
PID 1188 wrote to memory of 3284	1188	Au_.exe	87
PID 1188 wrote to memory of 3284	1188	Au_.exe	87
PID 1188 wrote to memory of 3284	1188	Au_.exe	87

C:\Users\Admin\AppData\Local\Temp\2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
"C:\Users\Admin\AppData\Local\Temp\2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe"
1⤵
- Checks computer location settings
- Loads dropped DLL
- Enumerates connected drives
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:468
- C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe
  "C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe" /from="explorer.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe
    "C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe" -downpower /from=explorer.exe -msgwndname=uninstallsend_message_E57884A
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Enumerates connected drives
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Privilege Escalation

Event Triggered Execution

T1546

AppInit DLLs

T1546.010

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

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

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe

Filesize
2.6MB

MD5
9819c376d8d7592ab978fb7bb67a92fd

SHA1
132c6164719fb52cb9d977e6143c0ba294c55b82

SHA256
3c5e9aa26f2ca932bca9db02777c91befb744e19d61de794897b36ad83f87e4b

SHA512
5b670c337f28801370f569c5d8c15e6c2135f9b043be7e643bb8cc293f341c006d4c07175106115572e11aef3791764e651e0ba0fe8833b254f5d9691b841712

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~e5786f3\Au_.exe.tmp

Filesize
2.7MB

MD5
3674a49fad3c18aca075e8426a9f3320

SHA1
2900aad3fa1db4bbdedaa0337c5a7f2d37902095

SHA256
470d36ea18eddd38f9d0c89ae973e84e5db94dfd57709bedecb96e4351fbfba4

SHA512
ca9327dae022beb88471cf7017853c50c987675c1f8dcb69b4b2dc892f35d5eb65eb88ac2f59113b84d3a0a98fb0e16eb76a90bef8f8a4f5861b8c16c756544f

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~e578973\uninstall_res\cgpb_bg.png

Filesize
1016B

MD5
315125d6cb7705306ace3dd71ce50e8e

SHA1
67f4e13ee507ccfa2df855bcf5ebbcdb0aff5d7f

SHA256
f76ec3175357ab52752a09a344278f167ac672da8aa0dad179ef4a8ee9038db9

SHA512
b37eb1d4274eddd8a11854f5cf02f72dad45fa71bc7ca8091ed4f44e423bbb2d023e2f68cc0d6cba1dcacc4e9e34fb280b0147218ec019fff31ebf447e91a259

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~e578973\uninstall_res\cgpb_fg.png

Filesize
984B

MD5
364888aa1329fb55f8377c34bc5b29d3

SHA1
6550c415a349c4df242aa219045cc184ba8d65ab

SHA256
28e85a601be919c96086c0ca2e056acd8184ec6f3cb1e35b2b15179b20e9d501

SHA512
8375b365f4e84c6b765213611dcc18eaca2f2a9e75a7d4e187fae3d0d2152d0323bf2922fb9a1ad4f8fcaad2a6d57e8345ce0828762b553fb6473468d08bb445

Download Submit
C:\Users\Admin\AppData\Local\tempuninstall.ini

Filesize
317B

MD5
db40ec764b2e435da14c92b72308ed6e

SHA1
7e95a22b15d20f736d7298bf545e0a73b08e6633

SHA256
859f1c7a7143c049084f7033a6da8bc94d519ec439d668520654f0a4073ed910

SHA512
4ec66c8febce5574dadeaddadec76256a3dd26f9e9dfca40fb57f8fada1e53e05ad2aa8ed743ff6704a5ec2b5cc4238636ee8241f3e04cdbf99a092b09a0ef91

Download Submit
C:\Users\Admin\AppData\Roaming\kingsoft\office6\log\setup\wpsuninstall.log

Filesize
15KB

MD5
97f195ac167ee07220797fa9079bb0e0

SHA1
3519a5c5b1bddb0e797dd567dc8257972f5ddc50

SHA256
697688467c6857eca574094bd2993e9612fb6c87cc38694e6a7a541c3e5797b5

SHA512
685c4a8e0ceb8d1fbc00db7dd08d91489275fb38ffcfc81774c24608e3c8420e71c3445ebd0cf09c18eb7ffdcb5f6495ba8d082d4414535e8527bdfa61bf289f

Download Submit
C:\Users\Admin\AppData\Roaming\kingsoft\office6\log\setup\wpsuninstall.log

Filesize
1KB

MD5
33b2795cb4222ea568e740db244ff2f4

SHA1
d243d26678a62984419ccf95e362741ec824950a

SHA256
496c6e95c02398b7a78a0975d980473af3ef4b07ba12d7a2a37cf7d21c328ba2

SHA512
5487ec3484573b86047b0b8776caa145b05ca14c55cdada19f1f1ae6e88205992bbf7d44e5b70f40282fea8080e151f0af09c553ab7e19080596abe855f18b02

Download Submit
C:\Users\Admin\AppData\Roaming\kingsoft\office6\log\setup\wpsuninstall.log

Filesize
1KB

MD5
2e3ecf69e2a7b44403c074419cbc1387

SHA1
64463bb7b9aa65ad6db3f24b5949fcee9b4ef141

SHA256
db11f2b4142053d0c9692a9e67d32bb35a86c0d4eb95f176304338953b6f2d7d

SHA512
b41bc50b979fad958f4bdab301477fdfa2c7aa5aaab7caf165e92b3659f4996f69ec7910be5d312219783d2f5d8a63eff1d95aa666b9ef9920a8f2b8e4485849

Download Submit
C:\Users\Admin\AppData\Roaming\kingsoft\office6\log\setup\wpsuninstall.log

Filesize
2KB

MD5
ce1e173a66aa41ffac760f87f2411f32

SHA1
26decd5d2e4eb7bb37a39fa7c08b126cdd537e04

SHA256
1102b973eb5f53aeb3d3a7787e5c76f0a80cfb0d5a892aacf70b0cc4fd991b19

SHA512
a50e3fb13d826878499df9c44904612659183a3ea9b8482934dda5b92f147ea021a3e247359fcbf3eacda38c2262713d7977a5d929b94b8be2010a19191a2c71

Download Submit
memory/468-34-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/468-32-0x0000000000D90000-0x0000000001022000-memory.dmp

Filesize
2.6MB

Download
memory/468-2-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1188-38-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1188-190-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/1188-191-0x0000000000E00000-0x0000000001092000-memory.dmp

Filesize
2.6MB

Download
memory/3284-57-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3284-195-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3284-193-0x0000000000E00000-0x0000000001092000-memory.dmp

Filesize
2.6MB

Download
memory/3284-203-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3284-211-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3284-235-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download