cf62d33cb26ac0a55e3cd529ea05d51580a22c4d5b421f7c0ed73a1af8b5e4b9

General

Target

40130a291cefeb3e7c3b829a4e64e500N.exe
Size

517KB
MD5

40130a291cefeb3e7c3b829a4e64e500
SHA1

76e1d91b224d4f3bdbc3556370bf4743d6c2c839
SHA256

cf62d33cb26ac0a55e3cd529ea05d51580a22c4d5b421f7c0ed73a1af8b5e4b9
SHA512

93aee1cfcc3c2ddb631aa7a9cea607fb535c9328a2b588db04d179413a6948f060545316f427c3e162734bb4b70538672c733ca103627e4ec0c9e5b07dd3b757
SSDEEP

6144:QdspDeDrxkg/vrMuJIgwhEFHyOrJcX/Pgqwzm5IzkWjS4e4azExBKO1t4Kb70NqT:28kxNhOZElO5kkWjhD4AOj5lG

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2732	TWZA.EXE

Loads dropped DLL 2 IoCs

pid	Process
2260	40130a291cefeb3e7c3b829a4e64e500N.exe
2260	40130a291cefeb3e7c3b829a4e64e500N.exe

Modifies system executable filetype association 2 TTPs 3 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\$Recycle.Bin\\NJE.EXE \"%1\" %*"	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	TWZA.EXE

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2260-28-0x0000000000400000-0x0000000000478000-memory.dmp	upx
behavioral1/files/0x000d00000001226b-25.dat	upx
behavioral1/files/0x00070000000164c8-10.dat	upx
behavioral1/memory/2260-0-0x0000000000400000-0x0000000000478000-memory.dmp	upx
behavioral1/memory/2732-30-0x0000000000400000-0x0000000000478000-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\UVIHIZ.EXE = "C:\\System Volume Information\\UVIHIZ.EXE"	40130a291cefeb3e7c3b829a4e64e500N.exe

Enumerates connected drives 3 TTPs 17 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)	\??\N:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\P:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\T:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\U:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\E:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\H:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\J:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\L:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\O:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\G:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\M:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\S:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\V:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\I:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\K:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\Q:	40130a291cefeb3e7c3b829a4e64e500N.exe
File opened (read-only)	\??\R:	40130a291cefeb3e7c3b829a4e64e500N.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	40130a291cefeb3e7c3b829a4e64e500N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TWZA.EXE

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\chm.file\shell\open	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\scrfile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\scrfile\shell\open\command\ = "C:\\$Recycle.Bin\\NJE.EXE \"%1\""	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command\ = "C:\\$Recycle.Bin\\NJE.EXE \"%1\""	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\inifile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\chm.file\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\inifile\shell\open\command\ = "C:\\$Recycle.Bin\\NJE.EXE %1"	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\chm.file\shell	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	TWZA.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "C:\\$Recycle.Bin\\SAD.EXE %1"	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\chm.file	40130a291cefeb3e7c3b829a4e64e500N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\regfile\shell\open\command	40130a291cefeb3e7c3b829a4e64e500N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\$Recycle.Bin\\NJE.EXE \"%1\" %*"	40130a291cefeb3e7c3b829a4e64e500N.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2732	TWZA.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 2732	2260	40130a291cefeb3e7c3b829a4e64e500N.exe	30
PID 2260 wrote to memory of 2732	2260	40130a291cefeb3e7c3b829a4e64e500N.exe	30
PID 2260 wrote to memory of 2732	2260	40130a291cefeb3e7c3b829a4e64e500N.exe	30
PID 2260 wrote to memory of 2732	2260	40130a291cefeb3e7c3b829a4e64e500N.exe	30

C:\Users\Admin\AppData\Local\Temp\40130a291cefeb3e7c3b829a4e64e500N.exe
"C:\Users\Admin\AppData\Local\Temp\40130a291cefeb3e7c3b829a4e64e500N.exe"
1⤵
- Loads dropped DLL
- Modifies system executable filetype association
- Adds Run key to start application
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2260
- C:\PerfLogs\TWZA.EXE
  C:\PerfLogs\TWZA.EXE
  2⤵
  - Executes dropped EXE
  - Modifies system executable filetype association
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: GetForegroundWindowSpam
  PID:2732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

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

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Event Triggered Execution

1

T1546

Change Default File Association

1

T1546.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\$Recycle.Bin\NJE.EXE

Filesize
517KB

MD5
b189e7f62b642c41b2785b11c2d3f3d2

SHA1
39623661649dfb677bf5e9c53a3805ba07539488

SHA256
aa583127e33a70afa194cc20c449a6927158bf18bc6846227de5673d85d81f7b

SHA512
cd9696d262fa346f704e5321e470d87d35b5600a017d297ee01fc8849bdea2565361696cce046c23fd68a3980fe02528638968cc5838ecb7dd5d39f6d8de0502

Download Submit
C:\PerfLogs\TWZA.EXE

Filesize
517KB

MD5
79df475325c786082c5c3b8c56a4972e

SHA1
d1ba20ba537ee81355052588ad4f703f33000b7d

SHA256
231babc1f79d1f93f9d8505466d54aa5c31b27b6f93aa0517e5c2ddd09f943cf

SHA512
7c2cae385489cb952141f5679d3bca305d6e6d1d59f2acdd53e4f2640fca07cff759338fe4e7d418e6a79ea459408654d238687f9055124de7b45e11f02731a4

Download Submit
memory/2260-29-0x0000000002DF0000-0x0000000002E68000-memory.dmp

Filesize
480KB

Download
memory/2260-28-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2260-26-0x0000000002DF0000-0x0000000002E68000-memory.dmp

Filesize
480KB

Download
memory/2260-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2260-0-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2732-27-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2732-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2732-31-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads