81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a

General

Target

81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
Size

207KB
MD5

69bc611edd280493944a17d41d885720
SHA1

34bffb68856250125e0b98e46aeb62617a14f347
SHA256

81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a
SHA512

187768e9f8c762f6d5b36e4380b656e7b3ec9efebf85c2bd44bf94c7051831aa470e8a91270b95d306e53fce637afcc96ea614d9f5194f8a6947519303b0bd46
SSDEEP

3072:5VXq2L5MBHbKAA+obcPxBTPSIUFymmBrtht70Cg2vAJENggvzxLKj8NqUunEQulx:5lqYAybcPxBT6IUEbIJ2YT+KwNq7nEX

Score

8^/10

discovery evasion persistence trojan upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ssffxjodkp = "C:\\Windows\\SysWOW64\\KBDNO3.exe"	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	KBDNO3.exe

Executes dropped EXE 1 IoCs

pid	Process
4196	KBDNO3.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2128-133-0x00000000005A0000-0x0000000000632000-memory.dmp	upx
behavioral2/memory/2128-136-0x00000000005A0000-0x0000000000632000-memory.dmp	upx
behavioral2/memory/2128-137-0x00000000005A0000-0x0000000000632000-memory.dmp	upx

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS 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\SystemBiosVersion	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	KBDNO3.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\KBDNO3.exe	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
File opened for modification	C:\Windows\SysWOW64\KBDNO3.exe	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command-Line Interface

T1059

pid	Process
212	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4196	KBDNO3.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 4196	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	81
PID 2128 wrote to memory of 4196	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	81
PID 2128 wrote to memory of 4196	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	81
PID 2128 wrote to memory of 4896	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	83
PID 2128 wrote to memory of 4896	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	83
PID 2128 wrote to memory of 4896	2128	81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe	83
PID 4196 wrote to memory of 212	4196	KBDNO3.exe	85
PID 4196 wrote to memory of 212	4196	KBDNO3.exe	85
PID 4196 wrote to memory of 212	4196	KBDNO3.exe	85

C:\Users\Admin\AppData\Local\Temp\81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe
"C:\Users\Admin\AppData\Local\Temp\81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2128
- C:\Windows\SysWOW64\KBDNO3.exe
  C:\Windows\SysWOW64\KBDNO3.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4196
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - Gathers network information
    PID:212
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins4234.bat "C:\Users\Admin\AppData\Local\Temp\81fd8d677a7c9e70f08325573318f7adcf68d1eebf20fe3934b9697288301f5a.exe"
  2⤵
  PID:4896

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

5

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins4234.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
C:\Windows\SysWOW64\KBDNO3.exe

Filesize
91KB

MD5
7d55ca4321cb11308b969fe877448009

SHA1
9a9f5d3ee79b2757ce9fcd325d4335f03d237e49

SHA256
fab7a89045a71065786c36d596fb596974da16bd9682abc4f9732055a526e84d

SHA512
209ee561bc45c0c41846478b4b94bcc6cdbbbf677ae82085307db2e669df4b621e96fd35208336285ff924a30c4a87570c4ee6d939e16713856c5b781fd23878

Download Submit
C:\Windows\SysWOW64\KBDNO3.exe

Filesize
91KB

MD5
7d55ca4321cb11308b969fe877448009

SHA1
9a9f5d3ee79b2757ce9fcd325d4335f03d237e49

SHA256
fab7a89045a71065786c36d596fb596974da16bd9682abc4f9732055a526e84d

SHA512
209ee561bc45c0c41846478b4b94bcc6cdbbbf677ae82085307db2e669df4b621e96fd35208336285ff924a30c4a87570c4ee6d939e16713856c5b781fd23878

Download Submit
memory/2128-133-0x00000000005A0000-0x0000000000632000-memory.dmp

Filesize
584KB

Download
memory/2128-136-0x00000000005A0000-0x0000000000632000-memory.dmp

Filesize
584KB

Download
memory/2128-137-0x00000000005A0000-0x0000000000632000-memory.dmp

Filesize
584KB

Download
memory/2128-138-0x0000000000604000-0x0000000000631000-memory.dmp

Filesize
180KB

Download
memory/2128-139-0x00000000005A1000-0x0000000000604000-memory.dmp

Filesize
396KB

Download
memory/2128-132-0x0000000000510000-0x000000000053E000-memory.dmp

Filesize
184KB

Download
memory/2128-150-0x00000000005A1000-0x0000000000604000-memory.dmp

Filesize
396KB

Download
memory/2128-149-0x00000000005A1000-0x0000000000604000-memory.dmp

Filesize
396KB

Download
memory/4196-143-0x0000000000401000-0x0000000000403000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads