floxif | 379a076f2f1971290d9585f2847c14db67cfcee82b8a318b9b7516ecc5f295f4

Analysis

max time kernel
145s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/files/0x00080000000120f9-1.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
behavioral1/files/0x00080000000120f9-1.dat	acprotect

Executes dropped EXE 2 IoCs

pid	Process
3056	Au_.exe
2692	Au_.exe

Loads dropped DLL 7 IoCs

pid	Process
2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
3056	Au_.exe
3056	Au_.exe
3056	Au_.exe
2692	Au_.exe
2692	Au_.exe

UPX packed file 12 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x00080000000120f9-1.dat	upx
behavioral1/memory/2092-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2092-30-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-27-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-200-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2692-201-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-203-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-210-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-216-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-222-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-228-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/3056-234-0x0000000010000000-0x0000000010030000-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 1 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:	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:\program files\common files\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	Au_.exe
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

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
3056	Au_.exe
3056	Au_.exe
2692	Au_.exe
3056	Au_.exe
3056	Au_.exe
3056	Au_.exe
3056	Au_.exe
3056	Au_.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3056	Au_.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe
Token: SeDebugPrivilege	3056	Au_.exe
Token: SeDebugPrivilege	2692	Au_.exe
Token: SeDebugPrivilege	3056	Au_.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3056	Au_.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 2092 wrote to memory of 3056	2092	2024-09-05_aef2bfae94193a904297ac137d9988a5_avoslocker_bitrat_floxif_hijackloader.exe	31
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32
PID 3056 wrote to memory of 2692	3056	Au_.exe	32

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⤵
- Loads dropped DLL
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Local\Temp\wps\~f76c86d\Au_.exe
  "C:\Users\Admin\AppData\Local\Temp\wps\~f76c86d\Au_.exe" /from="explorer.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Enumerates connected drives
  - Drops file in Program Files directory
  - 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:3056
- - C:\Users\Admin\AppData\Local\Temp\wps\~f76c86d\Au_.exe
    "C:\Users\Admin\AppData\Local\Temp\wps\~f76c86d\Au_.exe" -downpower /from=explorer.exe -msgwndname=uninstallsend_message_F76CB1C
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2692

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

Filesize
175B

MD5
1130c911bf5db4b8f7cf9b6f4b457623

SHA1
48e734c4bc1a8b5399bff4954e54b268bde9d54c

SHA256
eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

SHA512
94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

Download Submit
C:\Users\Admin\AppData\Local\Temp\A1D26E2\CB1CA80BF0.tmp

Filesize
2.6MB

MD5
9819c376d8d7592ab978fb7bb67a92fd

SHA1
132c6164719fb52cb9d977e6143c0ba294c55b82

SHA256
3c5e9aa26f2ca932bca9db02777c91befb744e19d61de794897b36ad83f87e4b

SHA512
5b670c337f28801370f569c5d8c15e6c2135f9b043be7e643bb8cc293f341c006d4c07175106115572e11aef3791764e651e0ba0fe8833b254f5d9691b841712

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~f76c86d\Au_.exe

Filesize
2.7MB

MD5
aef2bfae94193a904297ac137d9988a5

SHA1
668594b00a333fca4002f716311cd5aa4201d99f

SHA256
379a076f2f1971290d9585f2847c14db67cfcee82b8a318b9b7516ecc5f295f4

SHA512
f740415c48cf003aef77852c3aeed485bbbfb15a37f65d0037529eab03a15c727333af4f7a4e4b8ea06781cbcb5fb4a62c6531a00772ceba9bcec4a65f28dfbd

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~f76cd3e\uninstall_res\cgpb_bg.png

Filesize
1016B

MD5
315125d6cb7705306ace3dd71ce50e8e

SHA1
67f4e13ee507ccfa2df855bcf5ebbcdb0aff5d7f

SHA256
f76ec3175357ab52752a09a344278f167ac672da8aa0dad179ef4a8ee9038db9

SHA512
b37eb1d4274eddd8a11854f5cf02f72dad45fa71bc7ca8091ed4f44e423bbb2d023e2f68cc0d6cba1dcacc4e9e34fb280b0147218ec019fff31ebf447e91a259

Download Submit
C:\Users\Admin\AppData\Local\Temp\wps\~f76cd3e\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
14KB

MD5
2cefbb572005780fa851f00c830a0cc6

SHA1
50dc6875c1c379628760644c03dcaf76c54c4133

SHA256
da1e7fc79b72dde97c2d669c7885b8ad9ae78c9ce4398d4b3b14426e28d68e43

SHA512
d0790e41b7cdca7d422916db2659413b73a8b94764ee04564e9cc1766aaa0f25498fae871f0fa2a0f17c67f3de3c31a9edb72bb43a244d219ccb91eef97e0581

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

Filesize
1KB

MD5
aa31c1cea5247bf811a511e7e0be5c39

SHA1
f7532f2235ed2c2d4f9a04519dd99f14b220d2cf

SHA256
ecb52f7a53ad2c39d29c12b512d25a6728f1a18503e176c7be875d97110efb4c

SHA512
222d9609402f13cf89c323f17634951a37f4bad8cd62da6d6b0087d96ff7c63e2892ad0571e4ce9921366be5fd6ee9d37135f875bbf332c6c127ab9afb084744

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

Filesize
1KB

MD5
8f5b8e704e3b552b8471e3aa6c3ef17d

SHA1
553e9eb056220111acfd2d7a8c0b6d050d78486e

SHA256
99b02aad7b74801baa556fd67e97c39da4aa627c5f81db0d84d9e6647486d38e

SHA512
ca2bf9accf83381c921f3b615950d759973087d4ef6afb7df68777958e819060f0d981d83db083760038f11ee41e675489dfeb5eb1e14b9255e34cd3952b3653

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

Filesize
1KB

MD5
96c209b3ee97a3c891155f97d561479b

SHA1
0a3380db18087f89db818c333b83727cc51334f3

SHA256
410767a6bd223b6eefe0eb656ccdc6f2003e6338a02782c9fcf6331f4f015cf3

SHA512
f818275c17525aaa01b0e6a090b5e88f7475d0cf6d60fd916ce2e3a88f5dd356765a5bd5fa4fb98fe67d2b1395511c35730b613d2c5f3a2a4d999a406fb9a335

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
memory/2092-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2092-26-0x0000000000180000-0x0000000000412000-memory.dmp

Filesize
2.6MB

Download
memory/2092-30-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2692-43-0x0000000000140000-0x0000000000170000-memory.dmp

Filesize
192KB

Download
memory/2692-204-0x00000000013A0000-0x0000000001632000-memory.dmp

Filesize
2.6MB

Download
memory/2692-206-0x0000000000140000-0x0000000000170000-memory.dmp

Filesize
192KB

Download
memory/2692-201-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-203-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-200-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-31-0x0000000000240000-0x0000000000270000-memory.dmp

Filesize
192KB

Download
memory/3056-202-0x00000000013A0000-0x0000000001632000-memory.dmp

Filesize
2.6MB

Download
memory/3056-210-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-216-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-222-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-27-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-228-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/3056-234-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download