a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a

General

Target

a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
Size

151KB
MD5

710d11edb98a6bfe0a4adb326bc2a97d
SHA1

072fbaae08a614e6355324ddbd6a4782931761f4
SHA256

a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a
SHA512

237fa60685ed8413c4cea1893989f18571cb9f55e0f2bd1bb4496992f182f08acf61e5e930f4323d9e74ab94f9646bb1e31312307c147b515dc355f1b9c3b3f5
SSDEEP

3072:+YtPSsSxHLztw7tZ/0zFUuhq5L8zKOxmzLlTMpmUWqBGsJ2:V4PNLstZszlYL8zhaZw4nsJ2

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\WOW6432Node\Microsoft\Windows\CurrentVersion\run	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

Enumerates connected drives 3 TTPs 22 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)	\??\J:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\E:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\W:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\S:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\M:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\N:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\K:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\I:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\H:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\F:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\Z:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\Y:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\X:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\Q:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\P:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\O:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\L:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\G:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\U:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\T:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\R:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened (read-only)	\??\V:	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

Drops autorun.inf file 1 TTPs 2 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:\Documents and Settings\Admin\Local Settings\Application Data\Microsoft\CD Burning\autorun.inf	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
File opened for modification	C:\autorun.inf	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\PROGRAM FILES (X86)\ADOBE\ACROBAT READER DC\READER\ACRORD32.EXE	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5096	4220	WerFault.exe	79

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4220	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
4220	a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe

C:\Users\Admin\AppData\Local\Temp\a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe
"C:\Users\Admin\AppData\Local\Temp\a7b73861921a8e198b7fb56dc17de5f03f1d21738ba592357e2081045b0dbf8a.exe"
1⤵
- Modifies visibility of file extensions in Explorer
- Adds Run key to start application
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:4220
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4220 -s 1308
  2⤵
  - Program crash
  PID:5096

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4220 -ip 4220
1⤵
PID:2548

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4756

Network

MITRE ATT&CK Enterprise v6

Initial Access

Replication Through Removable Media

1

T1091

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Replication Through Removable Media

1

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4220-132-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4220-133-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads