5234a5d4fe8354b482eb10292122e020f3d05aca6791ee7e5c69749f317afaca

General

Target

903cc27a42d5ba92290db296e7b09dd0N.exe
Size

966KB
MD5

903cc27a42d5ba92290db296e7b09dd0
SHA1

f5541b54aa8e308b237eea23fd6345f3fd85dc5c
SHA256

5234a5d4fe8354b482eb10292122e020f3d05aca6791ee7e5c69749f317afaca
SHA512

c50dcada865fa8651c10e218e1b29a2b6100f454ba627b67accb719e25f5d81394ccd3d2279264302c6d5c322a7c8d14a0dde3b6c41ba33b51bc1b25ff3bf1a6
SSDEEP

24576:v6Zv2ivhBVnFys7xP86Lh7uhmh8VZ7i/+XAmvYSFdbRPIbgRrhB:vE2ivhQs7dLNuhmuVZ7iHmv5FJRIqv

Score

8^/10

discovery persistence upx

Malware Config

Signatures

Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}	903cc27a42d5ba92290db296e7b09dd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msydl32.exe"	903cc27a42d5ba92290db296e7b09dd0N.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	903cc27a42d5ba92290db296e7b09dd0N.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2792-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
behavioral2/files/0x000700000002345b-5.dat	upx
behavioral2/memory/2792-7-0x0000000000400000-0x0000000000439000-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\VCL = "vcl32.exe"	903cc27a42d5ba92290db296e7b09dd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	903cc27a42d5ba92290db296e7b09dd0N.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\concp32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe
File created	C:\Windows\SysWOW64\vcl32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe
File created	C:\Windows\SysWOW64\msydl32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe
File opened for modification	C:\Windows\SysWOW64\msydl32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe
File created	C:\Windows\SysWOW64\concp32.exe	903cc27a42d5ba92290db296e7b09dd0N.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4184	2792	WerFault.exe	82

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	903cc27a42d5ba92290db296e7b09dd0N.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	903cc27a42d5ba92290db296e7b09dd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}	903cc27a42d5ba92290db296e7b09dd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	903cc27a42d5ba92290db296e7b09dd0N.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	903cc27a42d5ba92290db296e7b09dd0N.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{831148E7-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 33cf0d1c7ee3ef097d84171826e700ad	903cc27a42d5ba92290db296e7b09dd0N.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2792	903cc27a42d5ba92290db296e7b09dd0N.exe

C:\Users\Admin\AppData\Local\Temp\903cc27a42d5ba92290db296e7b09dd0N.exe
"C:\Users\Admin\AppData\Local\Temp\903cc27a42d5ba92290db296e7b09dd0N.exe"
1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:2792
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2792 -s 752
  2⤵
  - Program crash
  PID:4184

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2792 -ip 2792
1⤵
PID:5028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Windows\SysWOW64\concp32.exe

Filesize
966KB

MD5
1f68cfbbd2e4cf37bbaa3e2c1a6fe106

SHA1
1f211c0317c69a3249184101c388d5a4f9ac3e1a

SHA256
97378be1ecc75f94c0968b02c94cb594815aa312e77263001c4e443bb802879a

SHA512
7da028026f39cafb56ad792976eda86a3c146e353058459ba78a39792240560948372386aa375c650f322234f0aac7f42ecb9b30c1acc94df69e096b840b739e

Download Submit
memory/2792-0-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2792-7-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads