xworm | 71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f

General

Target

23vcD1orbL.exe
Size

1.3MB
MD5

d48c30f50906d73b06aabec4a3c0ef96
SHA1

4ed2965e2c48d3e35a3e4e1ea8781d3761de94a5
SHA256

71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f
SHA512

71eb7ca54f7f1019716c9e5a323d0ffa892a6485fe387044deb9fe431e809bd2f8be5e35f3aba185eb53d437fc63a5a66704815b612e6ea960220610d459265f
SSDEEP

1536:c/G4iM3eweCmtR8K/ddBNm/LBOK+kAYxQb1biW3+FQxEfOO701d67/fxU9:cOrZ8kyt3AYeb1WRSEfO1vd9

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/z5PQ82wE

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2988-0-0x00000000008B0000-0x00000000008CC000-memory.dmp	family_xworm
behavioral1/files/0x0009000000012267-47.dat	family_xworm
behavioral1/memory/1364-49-0x0000000000FA0000-0x0000000000FBC000-memory.dmp	family_xworm
behavioral1/memory/1720-57-0x0000000001100000-0x000000000111C000-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\svchost.lnk	23vcD1orbL.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	23vcD1orbL.exe

Executes dropped EXE 4 IoCs

pid	Process
1364	svchost.exe
1308	svchost.exe
1720	svchost.exe
2868	svchost.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-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	23vcD1orbL.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
6	pastebin.com
7	pastebin.com
10	0.tcp.eu.ngrok.io

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
2460	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2988	23vcD1orbL.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2988	23vcD1orbL.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	23vcD1orbL.exe
Token: SeDebugPrivilege	2988	23vcD1orbL.exe
Token: SeDebugPrivilege	1364	svchost.exe
Token: SeDebugPrivilege	1308	svchost.exe
Token: SeDebugPrivilege	1720	svchost.exe
Token: SeDebugPrivilege	2868	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2988	23vcD1orbL.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 2460	2988	23vcD1orbL.exe	29
PID 2988 wrote to memory of 2460	2988	23vcD1orbL.exe	29
PID 2988 wrote to memory of 2460	2988	23vcD1orbL.exe	29
PID 2220 wrote to memory of 1364	2220	taskeng.exe	34
PID 2220 wrote to memory of 1364	2220	taskeng.exe	34
PID 2220 wrote to memory of 1364	2220	taskeng.exe	34
PID 2220 wrote to memory of 1308	2220	taskeng.exe	35
PID 2220 wrote to memory of 1308	2220	taskeng.exe	35
PID 2220 wrote to memory of 1308	2220	taskeng.exe	35
PID 2220 wrote to memory of 1720	2220	taskeng.exe	36
PID 2220 wrote to memory of 1720	2220	taskeng.exe	36
PID 2220 wrote to memory of 1720	2220	taskeng.exe	36
PID 2220 wrote to memory of 2868	2220	taskeng.exe	37
PID 2220 wrote to memory of 2868	2220	taskeng.exe	37
PID 2220 wrote to memory of 2868	2220	taskeng.exe	37

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\23vcD1orbL.exe
"C:\Users\Admin\AppData\Local\Temp\23vcD1orbL.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2460

C:\Windows\system32\taskeng.exe
taskeng.exe {18634745-B0E6-495C-A3B0-0C1D4F85830E} S-1-5-21-406356229-2805545415-1236085040-1000:IKJSPGIM\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2220
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1308
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1720
- C:\ProgramData\svchost.exe
  C:\ProgramData\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2868

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:\ProgramData\svchost.exe

Filesize
1.3MB

MD5
d48c30f50906d73b06aabec4a3c0ef96

SHA1
4ed2965e2c48d3e35a3e4e1ea8781d3761de94a5

SHA256
71015901a4bbe9f7f81a3f899bf7c21ceca2a332e272e31a4d6d2b6b4f71a59f

SHA512
71eb7ca54f7f1019716c9e5a323d0ffa892a6485fe387044deb9fe431e809bd2f8be5e35f3aba185eb53d437fc63a5a66704815b612e6ea960220610d459265f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarFEDF.tmp

Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
memory/1308-55-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/1308-54-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/1364-49-0x0000000000FA0000-0x0000000000FBC000-memory.dmp

Filesize
112KB

Download
memory/1364-51-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/1364-50-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/1720-57-0x0000000001100000-0x000000000111C000-memory.dmp

Filesize
112KB

Download
memory/1720-58-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/1720-59-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-61-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/2868-62-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/2988-1-0x000007FEF5240000-0x000007FEF5C2C000-memory.dmp

Filesize
9.9MB

Download
memory/2988-45-0x000000001B1C0000-0x000000001B240000-memory.dmp

Filesize
512KB

Download
memory/2988-2-0x000000001B1C0000-0x000000001B240000-memory.dmp

Filesize
512KB

Download
memory/2988-0-0x00000000008B0000-0x00000000008CC000-memory.dmp

Filesize
112KB

Download
memory/2988-4-0x000007FEF5240000-0x000007FEF5C2C000-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