ff76f608d11d6cd68329abdf5325e87613d691a9135fc7791cb451440168cdef

General

Target

b576009859b958e45c645f138b77dfc5.exe
Size

9KB
MD5

b576009859b958e45c645f138b77dfc5
SHA1

64a75442c105ee731736f379c3737bcc200830a4
SHA256

ff76f608d11d6cd68329abdf5325e87613d691a9135fc7791cb451440168cdef
SHA512

fa1d219f39f609da3d1ae651b707d5c4e71686904c4ee738971bdccaf526a519acb3155e8a731305e4825493440e9a7c2ece2ed0ce74f8267fcb8e41d490257d
SSDEEP

192:nm9xHwvuC+FFAZ7NLXhOmcOd8xxsQS0h5CY6W1delEZ98qS:m70uC+HAdNThO0d2qYr1MEMn

Score

7^/10

persistence upx

Malware Config

Signatures

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4252-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/files/0x000100000000002a-13.dat	upx
behavioral2/memory/4252-15-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/memory/4252-16-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/memory/4252-17-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/memory/4252-18-0x0000000000400000-0x000000000040F000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\crsss = "C:\\Windows\\system32\\niu.exe"	REG.exe

Enumerates connected drives 3 TTPs 21 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)	\??\S:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\U:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\V:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\E:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\H:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\L:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\R:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\Z:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\N:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\Q:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\W:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\X:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\O:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\T:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\G:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\J:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\K:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\M:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\I:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\P:	b576009859b958e45c645f138b77dfc5.exe
File opened (read-only)	\??\Y:	b576009859b958e45c645f138b77dfc5.exe

Drops autorun.inf file 1 TTPs 6 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:\Windows\SysWOW64\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File created	C:\Windows\SysWOW64\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File created	C:\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File opened for modification	C:\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File created	F:\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File opened for modification	F:\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\niu.exe	b576009859b958e45c645f138b77dfc5.exe
File opened for modification	C:\Windows\SysWOW64\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File created	C:\Windows\SysWOW64\Autorun.inf	b576009859b958e45c645f138b77dfc5.exe
File created	C:\Windows\SysWOW64\niu.exe	b576009859b958e45c645f138b77dfc5.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4564	REG.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4252 wrote to memory of 4564	4252	b576009859b958e45c645f138b77dfc5.exe	93
PID 4252 wrote to memory of 4564	4252	b576009859b958e45c645f138b77dfc5.exe	93
PID 4252 wrote to memory of 4564	4252	b576009859b958e45c645f138b77dfc5.exe	93

C:\Users\Admin\AppData\Local\Temp\b576009859b958e45c645f138b77dfc5.exe
"C:\Users\Admin\AppData\Local\Temp\b576009859b958e45c645f138b77dfc5.exe"
1⤵
- Enumerates connected drives
- Drops autorun.inf file
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:4252
- C:\Windows\SysWOW64\REG.exe
  REG.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /V crsss /T REG_SZ /D C:\Windows\system32\niu.exe /F
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

1

T1091

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

Lateral Movement

Replication Through Removable Media

1

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Autorun.inf

Filesize
159B

MD5
aae744afbfa3c7d6ee85e8c1102e2240

SHA1
7a8c5fc8a443ba3937fb4b578af789fbf65dee26

SHA256
360cf8dbbfe097ea81fbc425990607742307a72c25abe0d969bf772b0c0cd5a1

SHA512
a6eccbacfc2560b68c651ef337a7efeb65a0cac19e0d7ba197b21edac1f97de64f4035ba42c80b0cbb987091d0a32ad3ca66763a4bb85350a70629ea75c419d8

Download Submit
F:\niu.exe

Filesize
9KB

MD5
b576009859b958e45c645f138b77dfc5

SHA1
64a75442c105ee731736f379c3737bcc200830a4

SHA256
ff76f608d11d6cd68329abdf5325e87613d691a9135fc7791cb451440168cdef

SHA512
fa1d219f39f609da3d1ae651b707d5c4e71686904c4ee738971bdccaf526a519acb3155e8a731305e4825493440e9a7c2ece2ed0ce74f8267fcb8e41d490257d

Download Submit
memory/4252-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4252-15-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4252-16-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4252-17-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4252-18-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads