5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
02/10/2022, 00:31

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General

Target

5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
Size

251KB
MD5

4f7ab5d4c49c066debaefb768f1db000
SHA1

d019b88f0a547914d4bc2e62451184807fb7d887
SHA256

5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb
SHA512

0fcf110ccff218ff3d5cf712fda489e73a9fd103652350cda4c974f15c423fc20b21110b81ff94de45b6ac5a5837eea50c06ca54e44c662500c1c5a8e6f38c96
SSDEEP

3072:K4L9uT6U+45GZD1e8jdBv9+5An1HCfdHLU9d6c6V1YBLSkPPPmynIGoqqWOXK:LL9uT6B4lw+5An1HCfdguqHnIi

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	xfcuik.exe

Executes dropped EXE 1 IoCs

pid	Process
5084	xfcuik.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	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xfcuik = "C:\\Users\\Admin\\xfcuik.exe /p"	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\	xfcuik.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xfcuik = "C:\\Users\\Admin\\xfcuik.exe /s"	xfcuik.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xfcuik = "C:\\Users\\Admin\\xfcuik.exe /w"	xfcuik.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xfcuik = "C:\\Users\\Admin\\xfcuik.exe /p"	xfcuik.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	xfcuik.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	xfcuik.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe

Drops autorun.inf file 1 TTPs 1 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File opened for modification	C:\Users\Admin\c\autorun.inf	xfcuik.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 60 IoCs

pid	Process
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe
5084	xfcuik.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
5084	xfcuik.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2228 wrote to memory of 5084	2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe	83
PID 2228 wrote to memory of 5084	2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe	83
PID 2228 wrote to memory of 5084	2228	5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe	83

C:\Users\Admin\AppData\Local\Temp\5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe
"C:\Users\Admin\AppData\Local\Temp\5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb.exe"
1⤵
- Modifies visiblity of hidden/system files in Explorer
- Checks computer location settings
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2228
- C:\Users\Admin\xfcuik.exe
  "C:\Users\Admin\xfcuik.exe"
  2⤵
  - Modifies visiblity of hidden/system files in Explorer
  - Executes dropped EXE
  - Adds Run key to start application
  - Maps connected drives based on registry
  - Drops autorun.inf file
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:5084

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\xfcuik.exe

Filesize
251KB

MD5
4f7ab5d4c49c066debaefb768f1db000

SHA1
d019b88f0a547914d4bc2e62451184807fb7d887

SHA256
5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb

SHA512
0fcf110ccff218ff3d5cf712fda489e73a9fd103652350cda4c974f15c423fc20b21110b81ff94de45b6ac5a5837eea50c06ca54e44c662500c1c5a8e6f38c96

Download Submit
C:\Users\Admin\xfcuik.exe

Filesize
251KB

MD5
4f7ab5d4c49c066debaefb768f1db000

SHA1
d019b88f0a547914d4bc2e62451184807fb7d887

SHA256
5b0fc9842a36bac898fede9c6c5990fd5f0ce2f635c11184af81fb508e1c8cdb

SHA512
0fcf110ccff218ff3d5cf712fda489e73a9fd103652350cda4c974f15c423fc20b21110b81ff94de45b6ac5a5837eea50c06ca54e44c662500c1c5a8e6f38c96

Download Submit