b1f57d44d0a76f993c9a452e87c59c328f1a3609a63cf1e5c255e11a0073e041

General

Target

a65060ed695f08888f938ffec8d83da0N.exe
Size

486KB
MD5

a65060ed695f08888f938ffec8d83da0
SHA1

a7bbc1e88bc1561aa42e830bfebbc49f63992903
SHA256

b1f57d44d0a76f993c9a452e87c59c328f1a3609a63cf1e5c255e11a0073e041
SHA512

1f439c9af8921045d1056046c65583caa3e4892841e4cb530d917e42f9ab7962ac047fe821b5ba1d8bcf5ef9b58b6d550a6a05a448851feb7c06f3e690af6e9e
SSDEEP

6144:g5u5eG44AeJ2ssftlVN+zBfGrSWm+omDAgQsSygGG2IszBAYD:Cu5eG4bsilNoGSJ+omDAdsWGLTVXD

Score

7^/10

bootkit discovery persistence spyware stealer upx

Malware Config

Signatures

Deletes itself 1 IoCs

Processes:

yymrqocd.exe

pid process

3032 yymrqocd.exe
Executes dropped EXE 2 IoCs

Processes:

yymrqocd.exeflb.exe

pid process

3032 yymrqocd.exe
2420 flb.exe
Loads dropped DLL 1 IoCs

Processes:

flb.exe

pid process

2420 flb.exe
Reads user/profile data of web browsers 2 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

pid	process
3032	yymrqocd.exe

pid	process
3032	yymrqocd.exe
2420	flb.exe

pid	process
2420	flb.exe

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\yymrqocd.exe	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

flb.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wfl = "c:\\Program Files\\kecfh\\flb.exe \"c:\\Program Files\\kecfh\\flbxk.dll\",WriteErrorLog"	flb.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

Processes:

flb.exe

description	ioc	process
File opened (read-only)	\??\n:	flb.exe
File opened (read-only)	\??\s:	flb.exe
File opened (read-only)	\??\u:	flb.exe
File opened (read-only)	\??\z:	flb.exe
File opened (read-only)	\??\h:	flb.exe
File opened (read-only)	\??\l:	flb.exe
File opened (read-only)	\??\i:	flb.exe
File opened (read-only)	\??\k:	flb.exe
File opened (read-only)	\??\w:	flb.exe
File opened (read-only)	\??\a:	flb.exe
File opened (read-only)	\??\g:	flb.exe
File opened (read-only)	\??\o:	flb.exe
File opened (read-only)	\??\p:	flb.exe
File opened (read-only)	\??\t:	flb.exe
File opened (read-only)	\??\y:	flb.exe
File opened (read-only)	\??\e:	flb.exe
File opened (read-only)	\??\j:	flb.exe
File opened (read-only)	\??\q:	flb.exe
File opened (read-only)	\??\r:	flb.exe
File opened (read-only)	\??\v:	flb.exe
File opened (read-only)	\??\x:	flb.exe
File opened (read-only)	\??\b:	flb.exe
File opened (read-only)	\??\m:	flb.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

Processes:

flb.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 flb.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	flb.exe

Drops file in Program Files directory 4 IoCs

Processes:

yymrqocd.exe

description	ioc	process
File created	\??\c:\Program Files\kecfh\flbxk.dll	yymrqocd.exe
File created	\??\c:\Program Files\kecfh\flb.exe	yymrqocd.exe
File opened for modification	\??\c:\Program Files\kecfh\flb.exe	yymrqocd.exe
File opened for modification	\??\c:\Program Files\kecfh	yymrqocd.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

Processes:

PING.EXEyymrqocd.exeflb.exea65060ed695f08888f938ffec8d83da0N.execmd.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yymrqocd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	flb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a65060ed695f08888f938ffec8d83da0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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

Processes:

cmd.exePING.EXE

pid process

2600 cmd.exe
728 PING.EXE

pid	process
2600	cmd.exe
728	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

Processes:

flb.exe

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

728 PING.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

flb.exe

pid process

2420 flb.exe
2420 flb.exe
2420 flb.exe
2420 flb.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

flb.exe

description pid process

Token: SeDebugPrivilege 2420 flb.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

a65060ed695f08888f938ffec8d83da0N.exeyymrqocd.exe

pid process

812 a65060ed695f08888f938ffec8d83da0N.exe
3032 yymrqocd.exe

pid	process
728	PING.EXE

pid	process
2420	flb.exe
2420	flb.exe
2420	flb.exe
2420	flb.exe

description	pid	process
Token: SeDebugPrivilege	2420	flb.exe

pid	process
812	a65060ed695f08888f938ffec8d83da0N.exe
3032	yymrqocd.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

a65060ed695f08888f938ffec8d83da0N.execmd.exeyymrqocd.exe

description	pid	process	target process
PID 812 wrote to memory of 2600	812	a65060ed695f08888f938ffec8d83da0N.exe	cmd.exe
PID 812 wrote to memory of 2600	812	a65060ed695f08888f938ffec8d83da0N.exe	cmd.exe
PID 812 wrote to memory of 2600	812	a65060ed695f08888f938ffec8d83da0N.exe	cmd.exe
PID 2600 wrote to memory of 728	2600	cmd.exe	PING.EXE
PID 2600 wrote to memory of 728	2600	cmd.exe	PING.EXE
PID 2600 wrote to memory of 728	2600	cmd.exe	PING.EXE
PID 2600 wrote to memory of 3032	2600	cmd.exe	yymrqocd.exe
PID 2600 wrote to memory of 3032	2600	cmd.exe	yymrqocd.exe
PID 2600 wrote to memory of 3032	2600	cmd.exe	yymrqocd.exe
PID 3032 wrote to memory of 2420	3032	yymrqocd.exe	flb.exe
PID 3032 wrote to memory of 2420	3032	yymrqocd.exe	flb.exe
PID 3032 wrote to memory of 2420	3032	yymrqocd.exe	flb.exe

C:\Users\Admin\AppData\Local\Temp\a65060ed695f08888f938ffec8d83da0N.exe
"C:\Users\Admin\AppData\Local\Temp\a65060ed695f08888f938ffec8d83da0N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:812

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yymrqocd.exe "C:\Users\Admin\AppData\Local\Temp\a65060ed695f08888f938ffec8d83da0N.exe"
2⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious use of WriteProcessMemory
PID:2600

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:728

C:\Users\Admin\AppData\Local\Temp\yymrqocd.exe
C:\Users\Admin\AppData\Local\Temp\\yymrqocd.exe "C:\Users\Admin\AppData\Local\Temp\a65060ed695f08888f938ffec8d83da0N.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:3032

\??\c:\Program Files\kecfh\flb.exe
"c:\Program Files\kecfh\flb.exe" "c:\Program Files\kecfh\flbxk.dll",WriteErrorLog C:\Users\Admin\AppData\Local\Temp\yymrqocd.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:2420

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

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

Replay Monitor

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Downloads

C:\Program Files\kecfh\flb.exe

Filesize
60KB

MD5
889b99c52a60dd49227c5e485a016679

SHA1
8fa889e456aa646a4d0a4349977430ce5fa5e2d7

SHA256
6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910

SHA512
08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641

Download Submit
C:\Program Files\kecfh\flbxk.dll

Filesize
181KB

MD5
be39c002e48424a4b46056c5471d9646

SHA1
e06a99f096cd59366523d6cf8011de354a640e45

SHA256
fb4cd721a63d0b71591d0d27b18a2e6f39dbd7f9a0f451aa4a4b1b46360735c7

SHA512
711c9533f7f326f83c7d70efb0066ef33a0271c208b98c22144e0ab4c140abd87656f6db3ceb3976e896033375c6e0667dc0d2999d2f81e18a19ad90d7875d88

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

Filesize
486KB

MD5
6e9dcde294a25b03f19c8a631b2529e4

SHA1
d2887c6513bc11d316faaaaf066d9a971bb8aef4

SHA256
0d5ec0734ab4a1affcd3dfab65a102b63b5bafdf0773da9a1c20fefe783c30b2

SHA512
79a594cad337ea3d2aee53c82e2051a50215fee36cae165bf81f4c2a50e73dff66fd6fc4b96af625b95e20ed673862a78fb17837ebe1d780b03d99132c9b6765

Download Submit
memory/2420-11-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/2420-12-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/2420-14-0x0000000000770000-0x0000000000772000-memory.dmp

Filesize
8KB

Download
memory/2420-15-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/2420-17-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/2420-19-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download
memory/2420-26-0x0000000010000000-0x000000001004E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads