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 5 IoCs

resource	yara_rule
behavioral2/memory/1224-0-0x0000000000A50000-0x0000000000A60000-memory.dmp	family_xworm
behavioral2/files/0x0006000000022d9b-9.dat	family_xworm
behavioral2/files/0x0006000000022d9b-13.dat	family_xworm
behavioral2/files/0x0006000000022d9b-14.dat	family_xworm
behavioral2/files/0x0006000000022d9b-18.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2231940048-779848787-2990559741-1000\Control Panel\International\Geo\Nation	33f4da54d0818b1057088933aa143d64.exe

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
5052	33f4da54d0818b1057088933aa143d64.exe
3092	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-1-5-21-2231940048-779848787-2990559741-1000\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
22	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
924	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1224	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1224	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	1224	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	5052	33f4da54d0818b1057088933aa143d64.exe
Token: SeDebugPrivilege	3092	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1224	33f4da54d0818b1057088933aa143d64.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 1224 wrote to memory of 924	1224	33f4da54d0818b1057088933aa143d64.exe	91
PID 1224 wrote to memory of 924	1224	33f4da54d0818b1057088933aa143d64.exe	91

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⤵
- Checks computer location settings
- 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:1224
- 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:924

C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5052

C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
C:\Users\Admin\AppData\Roaming\33f4da54d0818b1057088933aa143d64.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3092

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\33f4da54d0818b1057088933aa143d64.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
42KB

MD5
33f4da54d0818b1057088933aa143d64

SHA1
9735288f7295d46685425eb3563fe8400dd9531a

SHA256
774f2a3f0d583501835a717a03f508ada182181d4c4ccb374ce07de72187fd7f

SHA512
0a04c1b3e69060a95848b6e1006bbb84301edd5390ca35c00127dce05f55c2045f4b18a347fa0311ed4c5f2f524dcdc415eeda698d26feac742dd1c6e48d9a37

Download Submit
memory/1224-11-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download
memory/1224-2-0x0000000001690000-0x00000000016A0000-memory.dmp

Filesize
64KB

Download
memory/1224-0-0x0000000000A50000-0x0000000000A60000-memory.dmp

Filesize
64KB

Download
memory/1224-1-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download
memory/3092-20-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download
memory/3092-21-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download
memory/5052-15-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download
memory/5052-17-0x00007FF8B4F10000-0x00007FF8B59D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads