xworm | ee7dd18f59e73fc4569a7a2564d52d6ee55b19757f89f57b17e35f32eb88327b

General

Target

tmp.exe
Size

95KB
MD5

c83359f746eb240727873f83f3881db0
SHA1

d2bf8a67d2a29e8a48ad685e3e586fde9a7e48a6
SHA256

ee7dd18f59e73fc4569a7a2564d52d6ee55b19757f89f57b17e35f32eb88327b
SHA512

00c30f2c9e38b7b09be0e7729d70803c7ab7d3b9e6b29592119050319b176ba0ca6b79c513c3afce1de025a968c5e278468eda9ccdbe2a9415635a68e715b05a
SSDEEP

1536:n1C8TP7w1ZJFfw9VGzlxjrR751lNz0UCdkV/L7e:1CaP7wHnfw9QxlN5T6

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

needforrat.hopto.org:7000

Mutex

4DmqnprMzJEWl3vs

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 6 IoCs

resource	yara_rule
behavioral1/memory/1856-0-0x0000000000950000-0x000000000096E000-memory.dmp	family_xworm
behavioral1/files/0x000e000000012265-9.dat	family_xworm
behavioral1/files/0x000e000000012265-10.dat	family_xworm
behavioral1/memory/2520-11-0x0000000000EC0000-0x0000000000EDE000-memory.dmp	family_xworm
behavioral1/files/0x000e000000012265-14.dat	family_xworm
behavioral1/memory/2420-15-0x00000000012C0000-0x00000000012DE000-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\tmp.exe	tmp.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tmp.exe	tmp.exe

Executes dropped EXE 2 IoCs

pid	Process
2520	tmp.exe
2420	tmp.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-1-5-21-3618187007-3650799920-3290345941-1000\Software\Microsoft\Windows\CurrentVersion\Run\tmp = "C:\\Users\\Admin\\AppData\\Roaming\\tmp.exe"	tmp.exe

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
4	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
2896	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	tmp.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 2896	1856	tmp.exe	29
PID 1856 wrote to memory of 2896	1856	tmp.exe	29
PID 1856 wrote to memory of 2896	1856	tmp.exe	29
PID 2552 wrote to memory of 2520	2552	taskeng.exe	32
PID 2552 wrote to memory of 2520	2552	taskeng.exe	32
PID 2552 wrote to memory of 2520	2552	taskeng.exe	32
PID 2552 wrote to memory of 2420	2552	taskeng.exe	35
PID 2552 wrote to memory of 2420	2552	taskeng.exe	35
PID 2552 wrote to memory of 2420	2552	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\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 1 /tn "tmp" /tr "C:\Users\Admin\AppData\Roaming\tmp.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2896

C:\Windows\system32\taskeng.exe
taskeng.exe {951998A2-05D6-4FF7-9AD2-DD2828A3383D} S-1-5-21-3618187007-3650799920-3290345941-1000:BPDFUYWR\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Users\Admin\AppData\Roaming\tmp.exe
  C:\Users\Admin\AppData\Roaming\tmp.exe
  2⤵
  - Executes dropped EXE
  PID:2520
- C:\Users\Admin\AppData\Roaming\tmp.exe
  C:\Users\Admin\AppData\Roaming\tmp.exe
  2⤵
  - Executes dropped EXE
  PID:2420

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\tmp.exe

Filesize
95KB

MD5
c83359f746eb240727873f83f3881db0

SHA1
d2bf8a67d2a29e8a48ad685e3e586fde9a7e48a6

SHA256
ee7dd18f59e73fc4569a7a2564d52d6ee55b19757f89f57b17e35f32eb88327b

SHA512
00c30f2c9e38b7b09be0e7729d70803c7ab7d3b9e6b29592119050319b176ba0ca6b79c513c3afce1de025a968c5e278468eda9ccdbe2a9415635a68e715b05a

Download Submit
C:\Users\Admin\AppData\Roaming\tmp.exe

Filesize
95KB

MD5
c83359f746eb240727873f83f3881db0

SHA1
d2bf8a67d2a29e8a48ad685e3e586fde9a7e48a6

SHA256
ee7dd18f59e73fc4569a7a2564d52d6ee55b19757f89f57b17e35f32eb88327b

SHA512
00c30f2c9e38b7b09be0e7729d70803c7ab7d3b9e6b29592119050319b176ba0ca6b79c513c3afce1de025a968c5e278468eda9ccdbe2a9415635a68e715b05a

Download Submit
C:\Users\Admin\AppData\Roaming\tmp.exe

Filesize
95KB

MD5
c83359f746eb240727873f83f3881db0

SHA1
d2bf8a67d2a29e8a48ad685e3e586fde9a7e48a6

SHA256
ee7dd18f59e73fc4569a7a2564d52d6ee55b19757f89f57b17e35f32eb88327b

SHA512
00c30f2c9e38b7b09be0e7729d70803c7ab7d3b9e6b29592119050319b176ba0ca6b79c513c3afce1de025a968c5e278468eda9ccdbe2a9415635a68e715b05a

Download Submit
memory/1856-6-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/1856-7-0x000000001AFD0000-0x000000001B050000-memory.dmp

Filesize
512KB

Download
memory/1856-0-0x0000000000950000-0x000000000096E000-memory.dmp

Filesize
120KB

Download
memory/1856-2-0x000000001AFD0000-0x000000001B050000-memory.dmp

Filesize
512KB

Download
memory/1856-1-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2420-15-0x00000000012C0000-0x00000000012DE000-memory.dmp

Filesize
120KB

Download
memory/2420-16-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2420-17-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-11-0x0000000000EC0000-0x0000000000EDE000-memory.dmp

Filesize
120KB

Download
memory/2520-12-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-13-0x000007FEF5870000-0x000007FEF625C000-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