ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a

General

Target

ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe
Size

198KB
MD5

1920ffe9b9e594e5d17d671fc651d102
SHA1

75e113425e55bff12e60bdbda91df8fb3a1d76e5
SHA256

ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a
SHA512

3d9e4fc48f3b4a67c8fc99dd01c5defce5b4ba77ab89940003ee6b88f085dd99791d059e9e60d9335e99475632c284fe84ca9472f7ced3342fb75731de221e50
SSDEEP

3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTV:X2vnSwjaOcADw9cUeCOfz

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1672	vutcle.exe

Executes dropped EXE 2 IoCs

pid	Process
1672	vutcle.exe
1892	rsf.exe

Loads dropped DLL 1 IoCs

pid	Process
1892	rsf.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\woxap\\rsf.exe \"c:\\Program Files\\woxap\\rsfjt.dll\",Compliance"	rsf.exe

Enumerates connected drives 3 TTPs 23 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)	\??\b:	rsf.exe
File opened (read-only)	\??\j:	rsf.exe
File opened (read-only)	\??\m:	rsf.exe
File opened (read-only)	\??\u:	rsf.exe
File opened (read-only)	\??\a:	rsf.exe
File opened (read-only)	\??\h:	rsf.exe
File opened (read-only)	\??\o:	rsf.exe
File opened (read-only)	\??\v:	rsf.exe
File opened (read-only)	\??\g:	rsf.exe
File opened (read-only)	\??\k:	rsf.exe
File opened (read-only)	\??\r:	rsf.exe
File opened (read-only)	\??\s:	rsf.exe
File opened (read-only)	\??\y:	rsf.exe
File opened (read-only)	\??\t:	rsf.exe
File opened (read-only)	\??\w:	rsf.exe
File opened (read-only)	\??\e:	rsf.exe
File opened (read-only)	\??\i:	rsf.exe
File opened (read-only)	\??\l:	rsf.exe
File opened (read-only)	\??\n:	rsf.exe
File opened (read-only)	\??\p:	rsf.exe
File opened (read-only)	\??\q:	rsf.exe
File opened (read-only)	\??\x:	rsf.exe
File opened (read-only)	\??\z:	rsf.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rsf.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\woxap	vutcle.exe
File created	\??\c:\Program Files\woxap\rsfjt.dll	vutcle.exe
File created	\??\c:\Program Files\woxap\rsf.exe	vutcle.exe
File opened for modification	\??\c:\Program Files\woxap\rsf.exe	vutcle.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vutcle.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rsf.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3912	cmd.exe
1320	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rsf.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rsf.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1320	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1892	rsf.exe
1892	rsf.exe
1892	rsf.exe
1892	rsf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1892	rsf.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1048	ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe
1672	vutcle.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 3912	1048	ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe	87
PID 1048 wrote to memory of 3912	1048	ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe	87
PID 1048 wrote to memory of 3912	1048	ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe	87
PID 3912 wrote to memory of 1320	3912	cmd.exe	89
PID 3912 wrote to memory of 1320	3912	cmd.exe	89
PID 3912 wrote to memory of 1320	3912	cmd.exe	89
PID 3912 wrote to memory of 1672	3912	cmd.exe	90
PID 3912 wrote to memory of 1672	3912	cmd.exe	90
PID 3912 wrote to memory of 1672	3912	cmd.exe	90
PID 1672 wrote to memory of 1892	1672	vutcle.exe	91
PID 1672 wrote to memory of 1892	1672	vutcle.exe	91
PID 1672 wrote to memory of 1892	1672	vutcle.exe	91

C:\Users\Admin\AppData\Local\Temp\ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe
"C:\Users\Admin\AppData\Local\Temp\ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vutcle.exe "C:\Users\Admin\AppData\Local\Temp\ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3912
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1320
- - C:\Users\Admin\AppData\Local\Temp\vutcle.exe
    C:\Users\Admin\AppData\Local\Temp\\vutcle.exe "C:\Users\Admin\AppData\Local\Temp\ef5d151794d6bcf9caaaad1fe3a523a32645d5babb5eec52d2cb011f5816af3a.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1672
  - - \??\c:\Program Files\woxap\rsf.exe
      "c:\Program Files\woxap\rsf.exe" "c:\Program Files\woxap\rsfjt.dll",Compliance C:\Users\Admin\AppData\Local\Temp\vutcle.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\woxap\rsf.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Program Files\woxap\rsfjt.dll

Filesize
141KB

MD5
03c7862f4c076faa9de9873896be4d0d

SHA1
a2e5d01906d4b7766cb73b435372d073137663ec

SHA256
2b82db3afca682df999e3f2384cb475dbd2079900839ed3f93377ae09ddab837

SHA512
bcb56ea74aade5c4e44464563290576d624068d144fd5149bfa8250331fd9f9b8d714c1e5d4359dfd9622f456dbb4e6f77ea7e1807b7e787f15ee148892577bb

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

Filesize
199KB

MD5
7fb450a6f70546eaee447a3db23301e6

SHA1
7443e5a0edf92dbae8e699e43969dff7368e6e08

SHA256
f12f3f22430cf9ee90975193598b35842f93cbe5fbafd2bbc3e8d69f26b6af06

SHA512
c37411ce3cf114949b226a31fc1be1d5eb5dfcf904decb36e4b82f97b08b2375c25cd895e56d442ad1444e306b7d49604f6449c87ea68bdaf86fc80999c0c4cc

Download Submit
memory/1048-5-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1048-0-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1048-1-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1048-2-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1672-9-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1672-10-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1672-16-0x0000000000400000-0x000000000044901D-memory.dmp

Filesize
292KB

Download
memory/1892-20-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/1892-21-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/1892-24-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads