vobfus | f996e3a8616e40d50ef6280a876db105d752772f276e3609e73a9f6ce731ccd0

General

Target

e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
Size

68KB
MD5

e54563370c1945b024bd3f72635aeac0
SHA1

8d12219a1660edc00c42b53788ea4b230525e6bd
SHA256

f996e3a8616e40d50ef6280a876db105d752772f276e3609e73a9f6ce731ccd0
SHA512

379378d070ba7e8fc1e558ac08d27bdc421e69c994155014f42e5ac7665017c5ef9213d1d7a7aa5a457c37c52071fdec0d626fd1f3b2fe492ee4ef3ba8d6b3ba
SSDEEP

1536:db3zeGBkljpZkbXiHm9o9kkairxskH/kroxl1v:dDGrZkbmmq9kka+nRxl1v

Score

10^/10

vobfus discovery persistence upx worm

Malware Config

Signatures

Vobfus
A widespread worm which spreads via network drives and removable media.
worm vobfus

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender"	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
Key created	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender"	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1224-0-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/memory/1224-6-0x0000000000400000-0x0000000000428000-memory.dmp	upx
behavioral1/files/0x000f0000000139a5-9.dat	upx
behavioral1/memory/1224-11-0x0000000000400000-0x0000000000428000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 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\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender"	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender"	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe

Script User-Agent 4 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	6	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1224	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1224	e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe

C:\Users\Admin\AppData\Local\Temp\e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e54563370c1945b024bd3f72635aeac0_JaffaCakes118.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
PID:1224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\windefender.jpg

Filesize
68KB

MD5
e54563370c1945b024bd3f72635aeac0

SHA1
8d12219a1660edc00c42b53788ea4b230525e6bd

SHA256
f996e3a8616e40d50ef6280a876db105d752772f276e3609e73a9f6ce731ccd0

SHA512
379378d070ba7e8fc1e558ac08d27bdc421e69c994155014f42e5ac7665017c5ef9213d1d7a7aa5a457c37c52071fdec0d626fd1f3b2fe492ee4ef3ba8d6b3ba

Download Submit
memory/1224-0-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1224-6-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1224-11-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads