floxif | 91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4

General

Target

91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
Size

772KB
MD5

050100011329a398cc16587663211d00
SHA1

2e6484d1b3b20a95ce455cb23de3f3d7deda94d3
SHA256

91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4
SHA512

eee670080d753f4539dedf8f35b75fa86b8f328a66bbe0f4f066b28cc88b2414d51b058f778ba5d8a91df1071963b20f689f0f0d26b236f02508c073cdb5bea9
SSDEEP

24576:eKWs7L6NuGpVUg71KEJ5wTqLdNXrEH78G:7F72Nlp6EQ6xdc

Score

10^/10

floxif backdoor discovery persistence privilege_escalation 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
behavioral1/files/0x0007000000012117-1.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/0x0007000000012117-1.dat	acprotect

Loads dropped DLL 4 IoCs

pid	Process
2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
2996	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
2996	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
2996	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.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:	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x0007000000012117-1.dat	upx
behavioral1/memory/2648-3-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2996-15-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2996-23-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral1/memory/2648-28-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\symsrv.dll	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
File created	\??\c:\program files\common files\system\symsrv.dll.000	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.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 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	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
Token: SeDebugPrivilege	2996	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 2996	2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe	30
PID 2648 wrote to memory of 2996	2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe	30
PID 2648 wrote to memory of 2996	2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe	30
PID 2648 wrote to memory of 2996	2648	91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe	30

C:\Users\Admin\AppData\Local\Temp\91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
"C:\Users\Admin\AppData\Local\Temp\91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.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:2648
- C:\Users\Admin\AppData\Local\Temp\91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe
  "C:\Users\Admin\AppData\Local\Temp\91bbe0850cd8ba0bbe38f3a756f8d16918e1e465af6d45428e55e9d4916087a4N.exe" -sfxwaitall:0 "78RePack.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Privilege Escalation

Event Triggered Execution

1

T1546

AppInit DLLs

1

T1546.010

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

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:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\78RePack.exe

Filesize
570KB

MD5
fac525b2b1acc757f0eb9bf994f4f331

SHA1
4435e0192f26eb23d9af0e1765e83946771d3673

SHA256
f93f45c6b40e3c09194df572a334b8da3556f4e7cf022508fee049f5bcf5f287

SHA512
cccb17e71be31d89548d531b658557ace5253126d119d1906769028d08b25312c0d041d4f8828184d46c15082013310e3094717700c6d14ef3d8e2c09d8b8cff

Download Submit
\??\c:\users\admin\appdata\local\temp\7zipsfx.000\WLImagex.exe

Filesize
133KB

MD5
df116571bfff53525bf924243b5ea251

SHA1
c44fad3359d73eb035da8b956605d3f1f0c85d6c

SHA256
0fca1b2843349c9bff5b5e8770f7702bfa2526a955cd62c2453572037702a85b

SHA512
201b96339427f2c319edbfffc74e93bd5f3322d86542c695097ee0a567c4891a90b4628c446d3cfa4891c25c928cdec2a47c90debfca057cddcb614ad6614371

Download Submit
\??\c:\users\admin\appdata\local\temp\7zipsfx.000\libwim-15.dll

Filesize
774KB

MD5
efa35e962eb00a0b662f6536b00bf5e6

SHA1
2916212f74e538395a542ba5728574508710f18f

SHA256
f19bf1258e86f9b63d0b2c36eb136894c531682eb7dcc784e8b8e2a3d8bd3c70

SHA512
0bf6d0e1cec68b32f4dc1b593c7dd5aba60c47666952e4bf5131c93bf828eb89a70bbe7f84d48baf3f7571ac827e511f87de176e0dcbf1140c641b705da06f22

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

Filesize
67KB

MD5
7574cf2c64f35161ab1292e2f532aabf

SHA1
14ba3fa927a06224dfe587014299e834def4644f

SHA256
de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

SHA512
4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

Download Submit
\Users\Admin\AppData\Local\Temp\7ZipSfx.000\78RePack.exe.tmp

Filesize
646KB

MD5
a6056a8d274670dfdcb89cf0d1c3f1d4

SHA1
0343fa6c62f28d83b7fa82a9fa0fd3ded6bce252

SHA256
1f929658c848a4a5c9bfb849b38b3c5947f47d84a71cb82650c80d8ea20ea5ea

SHA512
5cf45b0d10443700bc50ab5a4b7577e1061738a15e0b1bb06a9e3f3a0a24e8f9d5f0288c22373ae891b9388a81e11e1e801e0fa9f4a0e066077e7a40d883a5fe

Download Submit
memory/2648-3-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2648-6-0x000000000040D000-0x0000000000410000-memory.dmp

Filesize
12KB

Download
memory/2648-28-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2996-15-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2996-23-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download

Analysis

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