376b86e795ac22f7c439a3fbb6e2560149942b684a0f883830b60e679643741c

General

Target

76729bdc81b2f53f91101e607a21ba13.exe
Size

229KB
MD5

76729bdc81b2f53f91101e607a21ba13
SHA1

1518a5b5e536af83cccacae98de4ede65dca9769
SHA256

376b86e795ac22f7c439a3fbb6e2560149942b684a0f883830b60e679643741c
SHA512

9230b594b0515a25a0eea1e3e3945c3d5433414beebfff32f5f974e7bf65789650105a63fd3f530a9a21a812a976508c988af26199e7534a1576d2dec79c0b0d
SSDEEP

6144:XD55IvaE8HE4eWMtKKi6r0AByEV1q6tf5I:Xp9/T6r0AzTdf

Score

8^/10

discovery evasion persistence trojan upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 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	76729bdc81b2f53f91101e607a21ba13.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Kavavun = "C:\\Windows\\SysWOW64\\C_IS2022U.exe"	76729bdc81b2f53f91101e607a21ba13.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	C_IS2022U.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	76729bdc81b2f53f91101e607a21ba13.exe

Deletes itself 1 IoCs

pid	Process
2952	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1084	C_IS2022U.exe

Loads dropped DLL 2 IoCs

pid	Process
2184	76729bdc81b2f53f91101e607a21ba13.exe
2184	76729bdc81b2f53f91101e607a21ba13.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2184-1-0x00000000002A0000-0x0000000000330000-memory.dmp	upx
behavioral1/memory/2184-5-0x00000000002A0000-0x0000000000330000-memory.dmp	upx
behavioral1/memory/2184-6-0x00000000002A0000-0x0000000000330000-memory.dmp	upx
behavioral1/memory/2184-7-0x00000000002A0000-0x0000000000330000-memory.dmp	upx
behavioral1/memory/2184-24-0x00000000002A0000-0x0000000000330000-memory.dmp	upx

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	76729bdc81b2f53f91101e607a21ba13.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\C_IS2022U.exe	76729bdc81b2f53f91101e607a21ba13.exe
File opened for modification	C:\Windows\SysWOW64\C_IS2022U.exe	76729bdc81b2f53f91101e607a21ba13.exe

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

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2980	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2184	76729bdc81b2f53f91101e607a21ba13.exe
2184	76729bdc81b2f53f91101e607a21ba13.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	76729bdc81b2f53f91101e607a21ba13.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1084	C_IS2022U.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 1084	2184	76729bdc81b2f53f91101e607a21ba13.exe	28
PID 2184 wrote to memory of 1084	2184	76729bdc81b2f53f91101e607a21ba13.exe	28
PID 2184 wrote to memory of 1084	2184	76729bdc81b2f53f91101e607a21ba13.exe	28
PID 2184 wrote to memory of 1084	2184	76729bdc81b2f53f91101e607a21ba13.exe	28
PID 1084 wrote to memory of 2980	1084	C_IS2022U.exe	30
PID 1084 wrote to memory of 2980	1084	C_IS2022U.exe	30
PID 1084 wrote to memory of 2980	1084	C_IS2022U.exe	30
PID 1084 wrote to memory of 2980	1084	C_IS2022U.exe	30
PID 2184 wrote to memory of 2952	2184	76729bdc81b2f53f91101e607a21ba13.exe	32
PID 2184 wrote to memory of 2952	2184	76729bdc81b2f53f91101e607a21ba13.exe	32
PID 2184 wrote to memory of 2952	2184	76729bdc81b2f53f91101e607a21ba13.exe	32
PID 2184 wrote to memory of 2952	2184	76729bdc81b2f53f91101e607a21ba13.exe	32

C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe
"C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Windows\SysWOW64\C_IS2022U.exe
  C:\Windows\SysWOW64\C_IS2022U.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1084
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - Gathers network information
    PID:2980
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins7276.bat "C:\Users\Admin\AppData\Local\Temp\76729bdc81b2f53f91101e607a21ba13.exe"
  2⤵
  - Deletes itself
  PID:2952

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

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

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins7276.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
\Windows\SysWOW64\C_IS2022U.exe

Filesize
79KB

MD5
1db95891fd70e593753221ce76f56071

SHA1
e1058b4a4d0f9ee381768b545a51136630d35407

SHA256
d73975d1414eabdc43f818f65dc5da267e48cb54dc648997c0ffb9760e264aec

SHA512
b005a891ef85c0b7799f457347b8c18052457a13104a7fa1b9ab2fce017d1367764885a8a83da621895cf67c947b7b2328aea376ecb79862e6229b00f3f1ff46

Download Submit
memory/2184-0-0x0000000000220000-0x000000000024D000-memory.dmp

Filesize
180KB

Download
memory/2184-1-0x00000000002A0000-0x0000000000330000-memory.dmp

Filesize
576KB

Download
memory/2184-5-0x00000000002A0000-0x0000000000330000-memory.dmp

Filesize
576KB

Download
memory/2184-6-0x00000000002A0000-0x0000000000330000-memory.dmp

Filesize
576KB

Download
memory/2184-7-0x00000000002A0000-0x0000000000330000-memory.dmp

Filesize
576KB

Download
memory/2184-8-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/2184-24-0x00000000002A0000-0x0000000000330000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads