xworm | 999793a77939720fd339a4a06bfb8af07523f433009b1895b8dec743d4026008

General

Target

DHL EXPRESS.exe
Size

1.1MB
MD5

a4f882b8dfb6c075effcaf592d5662f8
SHA1

c3b5d0b630a8575304fdcc92023fb5b3c051c1b4
SHA256

999793a77939720fd339a4a06bfb8af07523f433009b1895b8dec743d4026008
SHA512

5780b1cdf63db3826fba5dfc0defa7672dab46782c693e1f7f629e3a3cfb13708d36d9e61872761eadfa554c3e553df28003862dc04dc8f6472fc5494965cad5
SSDEEP

24576:dAHnh+eWsN3skA4RV1Hom2KXFmIan9tlBtuWBd88PBE5:8h+ZkldoPK1Xan/jwWlQ

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

195.154.49.246:2080

Mutex

Wxez4wHXX8E21z87

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2740-33-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2740-37-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm
behavioral1/memory/2740-35-0x0000000000400000-0x0000000000410000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cunila.vbs	cunila.exe

Executes dropped EXE 1 IoCs

pid	Process
2576	cunila.exe

Loads dropped DLL 1 IoCs

pid	Process
2068	DHL EXPRESS.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00080000000190c6-13.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2576 set thread context of 2740	2576	cunila.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 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	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DHL EXPRESS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cunila.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2740	RegSvcs.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2576	cunila.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2740	RegSvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2740	RegSvcs.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 2576	2068	DHL EXPRESS.exe	30
PID 2068 wrote to memory of 2576	2068	DHL EXPRESS.exe	30
PID 2068 wrote to memory of 2576	2068	DHL EXPRESS.exe	30
PID 2068 wrote to memory of 2576	2068	DHL EXPRESS.exe	30
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31
PID 2576 wrote to memory of 2740	2576	cunila.exe	31

C:\Users\Admin\AppData\Local\Temp\DHL EXPRESS.exe
"C:\Users\Admin\AppData\Local\Temp\DHL EXPRESS.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Users\Admin\AppData\Local\holloing\cunila.exe
  "C:\Users\Admin\AppData\Local\Temp\DHL EXPRESS.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\DHL EXPRESS.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

\Users\Admin\AppData\Local\holloing\cunila.exe

Filesize
1.1MB

MD5
a4f882b8dfb6c075effcaf592d5662f8

SHA1
c3b5d0b630a8575304fdcc92023fb5b3c051c1b4

SHA256
999793a77939720fd339a4a06bfb8af07523f433009b1895b8dec743d4026008

SHA512
5780b1cdf63db3826fba5dfc0defa7672dab46782c693e1f7f629e3a3cfb13708d36d9e61872761eadfa554c3e553df28003862dc04dc8f6472fc5494965cad5

Download Submit
memory/2068-11-0x0000000000900000-0x0000000000D00000-memory.dmp

Filesize
4.0MB

Download
memory/2576-31-0x00000000008D0000-0x0000000000CD0000-memory.dmp

Filesize
4.0MB

Download
memory/2740-33-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2740-37-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2740-35-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2740-38-0x00000000748BE000-0x00000000748BF000-memory.dmp

Filesize
4KB

Download
memory/2740-39-0x00000000748B0000-0x0000000074F9E000-memory.dmp

Filesize
6.9MB

Download
memory/2740-40-0x00000000748BE000-0x00000000748BF000-memory.dmp

Filesize
4KB

Download
memory/2740-41-0x00000000748B0000-0x0000000074F9E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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