xworm | ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

General

Target

ya.exe
Size

63KB
MD5

222c2d239f4c8a1d73c736c9cc712807
SHA1

c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c
SHA256

ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d
SHA512

1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02
SSDEEP

1536:tJc/5q1qoR5PDdAZcIED4VuCkbFybjQ9f0jQRmONww+W:7c/iqoJekbFEQ9W+mONP+W

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:23638

209.25.140.1:5525:23638

bring-recorder.gl.at.ply.gg:23638

action-yesterday.gl.at.ply.gg:23638

147.185.221.19:23638

then-wheel.gl.at.ply.gg::23638

then-wheel.gl.at.ply.gg:23638

teen-modes.gl.at.ply.gg:23638

Attributes

Install_directory
%LocalAppData%
install_file
uwumonster.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3124-0-0x00000000007A0000-0x00000000007B6000-memory.dmp	family_xworm
behavioral2/files/0x00070000000233ea-7.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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	ya.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
3584	uwumonster.exe
3764	uwumonster.exe
2624	erkaqa.exe
3256	uwumonster.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-1-5-21-355664440-2199602304-1223909400-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\uwumonster = "C:\\Users\\Admin\\AppData\\Local\\uwumonster.exe"	ya.exe

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
3480	schtasks.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	3124	ya.exe
Token: SeDebugPrivilege	3124	ya.exe
Token: SeDebugPrivilege	3584	uwumonster.exe
Token: SeDebugPrivilege	3764	uwumonster.exe
Token: 33	3764	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	3764	AUDIODG.EXE
Token: SeDebugPrivilege	3256	uwumonster.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3124 wrote to memory of 3480	3124	ya.exe	89
PID 3124 wrote to memory of 3480	3124	ya.exe	89
PID 3124 wrote to memory of 2624	3124	ya.exe	112
PID 3124 wrote to memory of 2624	3124	ya.exe	112
PID 3124 wrote to memory of 2624	3124	ya.exe	112

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\ya.exe
"C:\Users\Admin\AppData\Local\Temp\ya.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3124
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "uwumonster" /tr "C:\Users\Admin\AppData\Local\uwumonster.exe"
  2⤵
  - Creates scheduled task(s)
  PID:3480
- C:\Users\Admin\AppData\Local\Temp\erkaqa.exe
  "C:\Users\Admin\AppData\Local\Temp\erkaqa.exe"
  2⤵
  - Executes dropped EXE
  PID:2624

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3584

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3764

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x448 0x308
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3764

C:\Users\Admin\AppData\Local\uwumonster.exe
C:\Users\Admin\AppData\Local\uwumonster.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3256

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

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\erkaqa.exe

Filesize
83KB

MD5
1453f56916c0ea96b9ba5b49f09757e2

SHA1
3e25edc13b69e5db4769f061f586e42b812996bf

SHA256
da79e0317881f0600ddaddf593184b1e7d6eb54604de089e4d625741e21c004b

SHA512
37febf9c7bd3f35b45de356e8dc92a9bd5e065471669cb9afdb7048308df0c852b3cbfc5f2a3cab2887d67c9dab4f2fb2bb21ee9de42d13b700784367d1f8ca6

Download Submit
C:\Users\Admin\AppData\Local\uwumonster.exe

Filesize
63KB

MD5
222c2d239f4c8a1d73c736c9cc712807

SHA1
c3aa61bd6f8cc640bcfa74c40d9283c9c08c7b3c

SHA256
ff43049677c57277f12a1d97f02af3029d7b75b5ad40303a28f1b0452997969d

SHA512
1f2fea85e45e93916306c234b916d6b4b200dac9656e44f4555f825dd8677cb5e927bd5e7a74bf2fb2f6972a3e6e2d294a6104add162ba3d53a0e6cfedef6a02

Download Submit
memory/3124-0-0x00000000007A0000-0x00000000007B6000-memory.dmp

Filesize
88KB

Download
memory/3124-12-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3124-13-0x000000001B4E0000-0x000000001B4EC000-memory.dmp

Filesize
48KB

Download
memory/3124-14-0x000000001B4F0000-0x000000001B500000-memory.dmp

Filesize
64KB

Download
memory/3124-6-0x000000001B4F0000-0x000000001B500000-memory.dmp

Filesize
64KB

Download
memory/3124-1-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3256-29-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3256-30-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3584-9-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3584-11-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3764-18-0x00007FF976F60000-0x00007FF977A21000-memory.dmp

Filesize
10.8MB

Download
memory/3764-19-0x00007FF976F60000-0x00007FF977A21000-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