xworm | db1d01443d81fe4daffb7f22967b64b6f66bc5cb3a0476b99b9b5da749a8727e

General

Target

hirrew.exe
Size

77KB
MD5

f8104d6800c12ee73a8991c881b73a15
SHA1

87d9c597eb8b22835bc8e94ca89513b3ab9a2512
SHA256

db1d01443d81fe4daffb7f22967b64b6f66bc5cb3a0476b99b9b5da749a8727e
SHA512

5496d235ea82d53c17ceb5cd09ed1f4993e27f3f963317f48de5e1836facec22f1a8f89818788d38ec3f15523fd526d301ddb432228a8b7eb49f8a527b5af439
SSDEEP

1536:+bqI97eJvslTBuTplpXkbgg8smj7pYOO9FzBSPR9+1YGqS:+bqU74vslTcpXkbg//uOO9FzBSPR93LS

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

192.168.100.28:7777

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1464-1-0x0000000000AF0000-0x0000000000B08000-memory.dmp	family_xworm
behavioral1/files/0x00080000000120fd-7.dat	family_xworm
behavioral1/memory/2864-9-0x0000000000ED0000-0x0000000000EE8000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ff.lnk	hirrew.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ff.lnk	hirrew.exe

Executes dropped EXE 3 IoCs

pid	Process
2864	ff
2284	ff
1848	ff

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\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\ff = "C:\\ProgramData\\ff"	hirrew.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2096	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1464	hirrew.exe
Token: SeDebugPrivilege	2864	ff
Token: SeDebugPrivilege	2284	ff
Token: SeDebugPrivilege	1848	ff

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 2096	1464	hirrew.exe	30
PID 1464 wrote to memory of 2096	1464	hirrew.exe	30
PID 1464 wrote to memory of 2096	1464	hirrew.exe	30
PID 2812 wrote to memory of 2864	2812	taskeng.exe	33
PID 2812 wrote to memory of 2864	2812	taskeng.exe	33
PID 2812 wrote to memory of 2864	2812	taskeng.exe	33
PID 2812 wrote to memory of 2284	2812	taskeng.exe	35
PID 2812 wrote to memory of 2284	2812	taskeng.exe	35
PID 2812 wrote to memory of 2284	2812	taskeng.exe	35
PID 2812 wrote to memory of 1848	2812	taskeng.exe	36
PID 2812 wrote to memory of 1848	2812	taskeng.exe	36
PID 2812 wrote to memory of 1848	2812	taskeng.exe	36

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\hirrew.exe
"C:\Users\Admin\AppData\Local\Temp\hirrew.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "ff" /tr "C:\ProgramData\ff"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2096

C:\Windows\system32\taskeng.exe
taskeng.exe {817E1AA3-0A3D-4CE3-A6E1-F4880FF345D3} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2812
- C:\ProgramData\ff
  C:\ProgramData\ff
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2864
- C:\ProgramData\ff
  C:\ProgramData\ff
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2284
- C:\ProgramData\ff
  C:\ProgramData\ff
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\ff

Filesize
77KB

MD5
f8104d6800c12ee73a8991c881b73a15

SHA1
87d9c597eb8b22835bc8e94ca89513b3ab9a2512

SHA256
db1d01443d81fe4daffb7f22967b64b6f66bc5cb3a0476b99b9b5da749a8727e

SHA512
5496d235ea82d53c17ceb5cd09ed1f4993e27f3f963317f48de5e1836facec22f1a8f89818788d38ec3f15523fd526d301ddb432228a8b7eb49f8a527b5af439

Download Submit
memory/1464-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/1464-1-0x0000000000AF0000-0x0000000000B08000-memory.dmp

Filesize
96KB

Download
memory/1464-5-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/1464-10-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/1464-11-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/2864-9-0x0000000000ED0000-0x0000000000EE8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads