xworm | 774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

General

Target

33f4da54d0818b1057088933aa143d64.exe
Size

42KB
MD5

33f4da54d0818b1057088933aa143d64
SHA1

9735288f7295d46685425eb3563fe8400dd9531a
SHA256

774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f
SHA512

0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37
SSDEEP

768:YTts7oAqUs54ZFLterXT+2n4KXAAZFEPh9/qYOChHvk2BYLfgQ:keHY4jsrTTX9Fw9/qYOC2Q+7

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

2.tcp.eu.ngrok.io:19217

Mutex

tPbnBtGFRRkRqaeq

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 7 IoCs

resource	yara_rule
behavioral1/memory/2704-0-0x0000000000BC0000-0x0000000000BD0000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012266-9.dat	family_xworm
behavioral1/files/0x000b000000012266-15.dat	family_xworm
behavioral1/files/0x000b000000012266-16.dat	family_xworm
behavioral1/memory/2900-17-0x0000000000370000-0x0000000000380000-memory.dmp	family_xworm
behavioral1/files/0x000b000000012266-20.dat	family_xworm
behavioral1/memory/1752-21-0x0000000001280000-0x0000000001290000-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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\33f4da54d0818b1057088933aa143d64.lnk	33f4da54d0818b1057088933aa143d64.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\33f4da54d0818b1057088933aa143d64.lnk	33f4da54d0818b1057088933aa143d64.exe

Executes dropped EXE 2 IoCs

pid	Process
2900	33f4da54d0818b1057088933aa143d64.exe
1752	33f4da54d0818b1057088933aa143d64.exe

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-1-5-21-1861898231-3446828954-4278112889-1000\Software\Microsoft\Windows\CurrentVersion\Run\33f4da54d0818b1057088933aa143d64 = "C:\\Users\\Admin\\AppData\\Roaming\\33f4da54d0818b1057088933aa143d64.exe"	33f4da54d0818b1057088933aa143d64.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2704	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2704	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	2704	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	2900	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	1752	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2704 wrote to memory of 2660	2704	33f4da54d0818b1057088933aa143d64.exe	29
PID 2704 wrote to memory of 2660	2704	33f4da54d0818b1057088933aa143d64.exe	29
PID 2704 wrote to memory of 2660	2704	33f4da54d0818b1057088933aa143d64.exe	29
PID 2012 wrote to memory of 2900	2012	taskeng.exe	34
PID 2012 wrote to memory of 2900	2012	taskeng.exe	34
PID 2012 wrote to memory of 2900	2012	taskeng.exe	34
PID 2012 wrote to memory of 1752	2012	taskeng.exe	35
PID 2012 wrote to memory of 1752	2012	taskeng.exe	35
PID 2012 wrote to memory of 1752	2012	taskeng.exe	35

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\33f4da54d0818b1057088933aa143d64.exe
"C:\Users\Admin\AppData\Local\Temp\33f4da54d0818b1057088933aa143d64.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2704
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "33f4da54d0818b1057088933aa143d64" /tr "C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2660

C:\Windows\system32\taskeng.exe
taskeng.exe {3FF78BA3-FE76-4538-A1D5-14963F044C1C} S-1-5-21-1861898231-3446828954-4278112889-1000:PTZSFKIF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
  C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
  C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe

Filesize
42KB

MD5
33f4da54d0818b1057088933aa143d64

SHA1
9735288f7295d46685425eb3563fe8400dd9531a

SHA256
774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

SHA512
0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37

Download Submit
C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe

Filesize
42KB

MD5
33f4da54d0818b1057088933aa143d64

SHA1
9735288f7295d46685425eb3563fe8400dd9531a

SHA256
774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

SHA512
0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37

Download Submit
C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe

Filesize
42KB

MD5
33f4da54d0818b1057088933aa143d64

SHA1
9735288f7295d46685425eb3563fe8400dd9531a

SHA256
774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

SHA512
0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37

Download Submit
C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe

Filesize
42KB

MD5
33f4da54d0818b1057088933aa143d64

SHA1
9735288f7295d46685425eb3563fe8400dd9531a

SHA256
774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

SHA512
0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37

Download Submit
memory/1752-21-0x0000000001280000-0x0000000001290000-memory.dmp

Filesize
64KB

Download
memory/1752-22-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/1752-23-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-11-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-12-0x000000001A990000-0x000000001AA10000-memory.dmp

Filesize
512KB

Download
memory/2704-1-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-2-0x000000001A990000-0x000000001AA10000-memory.dmp

Filesize
512KB

Download
memory/2704-0-0x0000000000BC0000-0x0000000000BD0000-memory.dmp

Filesize
64KB

Download
memory/2900-17-0x0000000000370000-0x0000000000380000-memory.dmp

Filesize
64KB

Download
memory/2900-18-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2900-19-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads