floxif | e8d9684735b9381923bc8d3cecc54924c3066e59365d566f0c5b1f86898e2307

General

Target

a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe
Size

5.3MB
MD5

a94073813049ac2fa9d9ff63cb24ca39
SHA1

a0fdf54a84adddae4ee4a37f9a7fa17b4aa3629b
SHA256

e8d9684735b9381923bc8d3cecc54924c3066e59365d566f0c5b1f86898e2307
SHA512

0679c0ee3515f1dddf9294f0c0103811788ec8abf130cac328d471e75554d56a601ab46bef12f882df2e65a4d87ed4021ad746d2c8158a55d7ca01a6fd1219a9
SSDEEP

98304:nOHbemITihoBh5tQ1g/vw9GcoNOqFWz7NI3URESZa7sLOvi6gTe2z6GgJpd4feL+:nOCLiQQV/Om+3UHZZfe2z6GsdwKLSQ8z

Score

10^/10

floxif nanocore backdoor discovery keylogger persistence privilege_escalation spyware stealer trojan upx

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

194.5.98.8:4573

127.0.0.1:4573

Mutex

596f453d-09e9-4806-a8b3-3cb60bb40d33

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-07T14:14:06.182021736Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
4573
default_group
Default
enable_debug_mode
true
gc_threshold
1.048576e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.048576e+07
mutex
596f453d-09e9-4806-a8b3-3cb60bb40d33
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
194.5.98.8
primary_dns_server
8.8.8.8
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
set_critical_process
true
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8000

Signatures

Floxif family
floxif
Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
backdoor trojan floxif
NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore
Nanocore family
nanocore

Detects Floxif payload 1 IoCs

backdoor

resource	yara_rule
behavioral2/files/0x000a000000023b88-6.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/0x000a000000023b88-6.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
4428	test.exe

Loads dropped DLL 4 IoCs

pid	Process
4428	test.exe
4428	test.exe
4428	test.exe
2344	MSBuild.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:	test.exe

AutoIT Executable 15 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000c000000023b2b-3.dat	autoit_exe
behavioral2/memory/4428-37-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-47-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-55-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-59-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-63-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-67-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-71-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-75-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-79-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-83-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-87-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-91-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-95-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe
behavioral2/memory/4428-99-0x0000000000660000-0x00000000007BA000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4428 set thread context of 2344	4428	test.exe	92

UPX packed file 13 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1544-0-0x0000000000400000-0x0000000000F89000-memory.dmp	upx
behavioral2/memory/4428-8-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/files/0x000a000000023b88-6.dat	upx
behavioral2/files/0x0032000000023b85-17.dat	upx
behavioral2/memory/2344-31-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/1544-30-0x0000000000400000-0x0000000000F89000-memory.dmp	upx
behavioral2/memory/4428-35-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4428-38-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/2344-43-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4428-48-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4428-56-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4428-60-0x0000000010000000-0x0000000010030000-memory.dmp	upx
behavioral2/memory/4428-80-0x0000000010000000-0x0000000010030000-memory.dmp	upx

Drops file in Program Files directory 2 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 4 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	a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	test.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4428	test.exe
4428	test.exe
2344	MSBuild.exe
2344	MSBuild.exe
2344	MSBuild.exe
4428	test.exe
4428	test.exe
4428	test.exe
4428	test.exe
4428	test.exe
4428	test.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2344	MSBuild.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4428	test.exe
4428	test.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4428	test.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4428	test.exe
Token: SeDebugPrivilege	2344	MSBuild.exe
Token: SeDebugPrivilege	2344	MSBuild.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4428	test.exe
4428	test.exe
4428	test.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4428	test.exe
4428	test.exe
4428	test.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1544 wrote to memory of 1508	1544	a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe	84
PID 1544 wrote to memory of 1508	1544	a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe	84
PID 1544 wrote to memory of 1508	1544	a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe	84
PID 1508 wrote to memory of 4428	1508	cmd.exe	85
PID 1508 wrote to memory of 4428	1508	cmd.exe	85
PID 1508 wrote to memory of 4428	1508	cmd.exe	85
PID 4428 wrote to memory of 3628	4428	test.exe	91
PID 4428 wrote to memory of 3628	4428	test.exe	91
PID 4428 wrote to memory of 3628	4428	test.exe	91
PID 4428 wrote to memory of 2344	4428	test.exe	92
PID 4428 wrote to memory of 2344	4428	test.exe	92
PID 4428 wrote to memory of 2344	4428	test.exe	92
PID 4428 wrote to memory of 2344	4428	test.exe	92

C:\Users\Admin\AppData\Local\Temp\a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1544
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Enumerates connected drives
    - Suspicious use of SetThreadContext
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious behavior: RenamesItself
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:4428
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\MSBuild.exe"
      4⤵
      PID:3628
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\MSBuild.exe"
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:2344

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

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:\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\a94073813049ac2fa9d9ff63cb24ca39_JaffaCakes118.exe.tmp

Filesize
5.4MB

MD5
9ec96d26eb3218d74dc97a3a56213f96

SHA1
770fe4279cf0122d453840adc06dd8f30822fd05

SHA256
1de13b19d3d5c69b922909d1b1bd3898eae384dba0bd2200f6efd7d54a4a9af1

SHA512
3d64caf392c5d554ca2167762dbe90bd04e0db55a52795c38c143e1be02fe5c22ff2f9602d27f354c73c192cd79f6877fd95799cdc251f3229b72be76c7de737

Download Submit
C:\Users\Admin\AppData\Local\Temp\test.exe

Filesize
1.4MB

MD5
4a923d20e64c1337c676c4de82b67fe3

SHA1
38657d082225e8e146574e9ebe54bfb2486a2ea5

SHA256
5349936f32f9d998a6b60cb20c1f8de9eca1f709d362877e2fe32d1a655310d2

SHA512
9c5b0ac9406dce68df13e1e51fb0a7b46b3d5229402dd80543f8345e4767c4c104ea43fca34f85a46815075f332aef6b4f637bc7f8bb78c13e4d60648e2b5e44

Download Submit
memory/1544-30-0x0000000000400000-0x0000000000F89000-memory.dmp

Filesize
11.5MB

Download
memory/1544-0-0x0000000000400000-0x0000000000F89000-memory.dmp

Filesize
11.5MB

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

Filesize
192KB

Download
memory/2344-31-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/2344-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4428-56-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-35-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-60-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-59-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-37-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-39-0x0000000005670000-0x00000000061F9000-memory.dmp

Filesize
11.5MB

Download
memory/4428-40-0x0000000005670000-0x00000000061F9000-memory.dmp

Filesize
11.5MB

Download
memory/4428-10-0x0000000000661000-0x0000000000662000-memory.dmp

Filesize
4KB

Download
memory/4428-48-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-47-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-8-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-55-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-99-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-24-0x0000000005670000-0x00000000061F9000-memory.dmp

Filesize
11.5MB

Download
memory/4428-38-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-63-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-67-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-71-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-75-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-80-0x0000000010000000-0x0000000010030000-memory.dmp

Filesize
192KB

Download
memory/4428-79-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-83-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-87-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-91-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-95-0x0000000000660000-0x00000000007BA000-memory.dmp

Filesize
1.4MB

Download
memory/4428-25-0x0000000005670000-0x00000000061F9000-memory.dmp

Filesize
11.5MB

Download

Analysis

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