76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c

General

Target

76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe
Size

69KB
MD5

dec861b6a93ae40276835bc0e76f7da9
SHA1

562526803ed27f92d5e33eb033bb43faf5defe52
SHA256

76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c
SHA512

83cda7a7b90e3e2f52177ce6238351c9efac783063a98e0df987c9cfd2ca6cacd12134c68559badb67ce24192463e424a123ea6f3598ed79086ab08bbc89d485
SSDEEP

768:qGHV45EDE477AZbUJx0rZGE3jCELoiMMj6hZ3nE+EXVmkDbjRL8Khc15Z6J1S:qG14P477AxUYrZGoC09k0SkTRHhWqP

Score

9^/10

bootkit persistence spyware stealer

Malware Config

Signatures

Detects executables containing base64 encoded User Agent 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/412-11-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral2/memory/412-12-0x0000000010000000-0x000000001002E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

22 412 rundll32.exe
23 412 rundll32.exe
52 412 rundll32.exe
Deletes itself 1 IoCs

Processes:

rdnrpmt.exe

pid process

3940 rdnrpmt.exe
Executes dropped EXE 1 IoCs

Processes:

rdnrpmt.exe

pid process

3940 rdnrpmt.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

412 rundll32.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

flow	pid	process
22	412	rundll32.exe
23	412	rundll32.exe
52	412	rundll32.exe

pid	process
3940	rdnrpmt.exe

pid	process
3940	rdnrpmt.exe

pid	process
412	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\lbxdlw\\wffba.dll\",init"	rundll32.exe

Enumerates connected drives 3 TTPs 2 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:

rundll32.exe

description ioc process

File opened (read-only) \??\a: rundll32.exe
File opened (read-only) \??\b: rundll32.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:

rundll32.exe

description ioc process

File opened for modification \??\PHYSICALDRIVE0 rundll32.exe

description	ioc	process
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe

description	ioc	process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.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:

rundll32.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

408 PING.EXE
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

rundll32.exe

pid process

412 rundll32.exe
412 rundll32.exe
412 rundll32.exe
412 rundll32.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

rundll32.exe

description pid process

Token: SeDebugPrivilege 412 rundll32.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exerdnrpmt.exe

pid process

1572 76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe
3940 rdnrpmt.exe

pid	process
408	PING.EXE

pid	process
412	rundll32.exe
412	rundll32.exe
412	rundll32.exe
412	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	412	rundll32.exe

pid	process
1572	76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe
3940	rdnrpmt.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.execmd.exerdnrpmt.exe

description	pid	process	target process
PID 1572 wrote to memory of 2980	1572	76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe	cmd.exe
PID 1572 wrote to memory of 2980	1572	76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe	cmd.exe
PID 1572 wrote to memory of 2980	1572	76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe	cmd.exe
PID 2980 wrote to memory of 408	2980	cmd.exe	PING.EXE
PID 2980 wrote to memory of 408	2980	cmd.exe	PING.EXE
PID 2980 wrote to memory of 408	2980	cmd.exe	PING.EXE
PID 2980 wrote to memory of 3940	2980	cmd.exe	rdnrpmt.exe
PID 2980 wrote to memory of 3940	2980	cmd.exe	rdnrpmt.exe
PID 2980 wrote to memory of 3940	2980	cmd.exe	rdnrpmt.exe
PID 3940 wrote to memory of 412	3940	rdnrpmt.exe	rundll32.exe
PID 3940 wrote to memory of 412	3940	rdnrpmt.exe	rundll32.exe
PID 3940 wrote to memory of 412	3940	rdnrpmt.exe	rundll32.exe

C:\Users\Admin\AppData\Local\Temp\76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe
"C:\Users\Admin\AppData\Local\Temp\76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1572

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\rdnrpmt.exe "C:\Users\Admin\AppData\Local\Temp\76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2980

C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
3⤵
- Runs ping.exe
PID:408

\??\c:\rdnrpmt.exe
c:\rdnrpmt.exe "C:\Users\Admin\AppData\Local\Temp\76364b99afcf418154e809544c29b6a52a6a33a3422ffda4b7a6eb0354613f5c.exe"
3⤵
- Deletes itself
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3940

\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\lbxdlw\wffba.dll",init c:\rdnrpmt.exe
4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:412

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3756 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:1256

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

2

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\rdnrpmt.exe
Filesize
69KB

MD5
e8ff23ce6e0966f3a4c1c1603cddbe79

SHA1
4927dbb86308aafe626f4acab11e57aa8e333983

SHA256
6d2e46a128ef9ccd223cb1b03bf4dd10ec2680cb49113a187b973b4eb705bf55

SHA512
a80ce73a956f810f949826b060b43f38874396c066ccdd74907aab4a874f1beeb170435ae26486c94b726a3301bb637b9b72a52e2af56e76671b9f4d2acd79f5

Download Submit
\??\c:\lbxdlw\wffba.dll
Filesize
42KB

MD5
36e3fb5964d663272cf1169e1e1ca478

SHA1
58115e08b49505bcbbb5c88a28a86222ba18d5d4

SHA256
c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7

SHA512
daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442

Download Submit
memory/412-10-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/412-11-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/412-12-0x0000000010000000-0x000000001002E000-memory.dmp

Filesize
184KB

Download
memory/1572-0-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/1572-2-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/3940-7-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads