floxif | e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2ee

General

Target

e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
Size

2.5MB
MD5

00ba7df1ab0f880c93f0bca472e30e40
SHA1

0cc279881f0c1bb7d7549540aef7134110bd95e8
SHA256

e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2ee
SHA512

5ad39ea19d2991c5814b78de3493fcd9b8ba2aa2a08575b6437b1ada5740dd205cff41e61bc8eaec2861c0ffe99d806ce1bfb811d179ad4eb9dc67651cf84fa2
SSDEEP

49152:1KiC/rk62xWNol+5gOsLO66qJ6021cJjLtk4pWGNG5VGFPNqJyoTe:+rZ23AbsK6Ro022JjL2WEiVqJZe

Score

10^/10

floxif backdoor discovery trojan upx

Malware Config

Signatures

Floxif family
floxif
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/0x0009000000023c6a-1.dat	floxif

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0009000000023c6a-1.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
2036	update.exe

Loads dropped DLL 5 IoCs

pid	Process
536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
2036	update.exe
2036	update.exe
536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.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:	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x0009000000023c6a-1.dat	upx
behavioral2/memory/536-4-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/536-49-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/536-74-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	\??\c:\program files\common files\system\symsrv.dll.000	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
File created	C:\Program Files\Common Files\System\symsrv.dll	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\setupapi.log	update.exe
File opened for modification	\??\c:\windows\KB893803v2.log	update.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	update.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 2036	536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe	84
PID 536 wrote to memory of 2036	536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe	84
PID 536 wrote to memory of 2036	536	e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe	84

C:\Users\Admin\AppData\Local\Temp\e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe
"C:\Users\Admin\AppData\Local\Temp\e8f265594d1d17b45a9cb5a7057a30f88dd34bcb03d4273ef9bb6c31340ab2eeN.exe"
1⤵
- 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:536
- \??\c:\ddafedc4c4170060ed101206c368\UPDATE\update.exe
  c:\ddafedc4c4170060ed101206c368\UPDATE\update.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  PID:2036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
C:\ddafedc4c4170060ed101206c368\update\UPDSPAPI.dll.tmp

Filesize
439KB

MD5
4a85417305b3f28ab69d05b1a869e87d

SHA1
2bf73b53a6f6c9fb20612fea309b478433fa2ba5

SHA256
5bd680310b01883c001cdd6b2a9aef1323fef690b546b432f6c88334f67eb9ce

SHA512
f4444a35d3eaa9e1e60828f81b57c4bdbe0c9c9c3c789260a2f1b18c75ffdeb93e798fd307c7f4fe3303b168bfa59156cc8ccaf24d8fb490582bedfe9c37d311

Download Submit
C:\ddafedc4c4170060ed101206c368\update\update.exe

Filesize
701KB

MD5
3b5eaaedb8a9d3f98debbdb0cfd214d5

SHA1
c9e09f6f6026f928d3d6d9056af868df83bd44ef

SHA256
2e2e9f1ea41d8673bcf69c8c97fc16c22932e2b7807fc87c556516261ea33d99

SHA512
26dbaefdedf9ba0094714f65d78b7c68fefc6afbd937cb0322ac698cbf3d104c4ccfbfb671314d6ea98bce2b0c090e2d4a19441d1abc2acb6b143e05818c2b75

Download Submit
C:\ddafedc4c4170060ed101206c368\update\updspapi.dll

Filesize
363KB

MD5
ebdb17c673b090a949f17c9e6486aaf3

SHA1
2231731f56f803662e0f1d537b22cba7625ef433

SHA256
f484cf06e20996e1887b4304b33444f3ee1c03fb912f5ec8d5327c4074a97abb

SHA512
b05b2e548c507c2bce556acd43174c2a2743d46ba816896e97a475089237020208c710e25aa204aee40be36cc3c8480da0dc6c383cadf2c619268b48f5e8fe40

Download Submit
\??\c:\ddafedc4c4170060ed101206c368\update\update_win2k.inf

Filesize
26KB

MD5
6e0bea7e95f32f24524f437396294160

SHA1
c18165182e5aa71bf5dc5401357570c54b48a1e9

SHA256
249f235710df38dcf59ee7d04fb14e460cd0ce41abd487387ff8cea336eb5b7b

SHA512
ec3a1a4cea3e63fc3b61bab9b08fe4a0a6be2f622bcb6fe99ba838fc2bb1cf5f71098776c383fd9cc7f0a9851b8190c6f280914ee54788d13c10613e97cd5f97

Download Submit
\??\c:\ddafedc4c4170060ed101206c368\update\updatebr.inf

Filesize
287B

MD5
7338506092eba55bd27963ad322cfeae

SHA1
0d80de1a2e27128d27bc12c5f9f7a938ef8cb817

SHA256
c5b64cce66182b9f35b670be6620dabd2f42ee3c8892eb9ef69bc75b52e5ee81

SHA512
bd4632d18b78b5742d428e6acb6a6b6196649cf323f7f4f4eb8d12cdbf4e9a358c93637ea2556cef83fa8e188e1ef1696743b6a25cd0feea5520bf924aa24eca

Download Submit
memory/536-49-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/536-6-0x0000000001005000-0x0000000001006000-memory.dmp

Filesize
4KB

Download
memory/536-4-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/536-74-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2036-33-0x0000000000A40000-0x0000000000A9C000-memory.dmp

Filesize
368KB

Download
memory/2036-51-0x0000000000A40000-0x0000000000A9C000-memory.dmp

Filesize
368KB

Download
memory/2036-54-0x0000000000A40000-0x0000000000A9C000-memory.dmp

Filesize
368KB

Download

Analysis

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