xworm | 0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c

General

Target

Winrar Code Craker.exe
Size

4.0MB
MD5

0f34e7a485d0884daae6dec91541b742
SHA1

e366c430f4cf375dd96ca92edfe06ff165869e46
SHA256

0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c
SHA512

8e966e4a13beb16713a22bfd467f3fc18a81d47cbdf421ba113c5ec5b86a12011a50a82adf6b4e9bc6e37f6e8ca468420eaf30d62cab749a221e1f0b9a4018ec
SSDEEP

98304:YkhH66TO4Za+CtcszUqoLmO/AWyeT7DJgBSEpxEydq2EdtIONLG:c6QcBdCRWyen1zE7Ey8JdyONG

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

jynx.uncofig.com:1111

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000028c52-6.dat	family_xworm
behavioral2/memory/792-13-0x0000000000960000-0x000000000097A000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3880	powershell.exe
3248	powershell.exe
2816	powershell.exe
3864	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
792	helper.exe
4176	winrar-x64-701fr.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-1-5-21-4249425805-3408538557-1766626484-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	helper.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
1	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
792	helper.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3880	powershell.exe
3880	powershell.exe
3248	powershell.exe
3248	powershell.exe
2816	powershell.exe
2816	powershell.exe
3864	powershell.exe
3864	powershell.exe
792	helper.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	792	helper.exe
Token: SeDebugPrivilege	3880	powershell.exe
Token: SeDebugPrivilege	3248	powershell.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	3864	powershell.exe
Token: SeDebugPrivilege	792	helper.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4176	winrar-x64-701fr.exe
4176	winrar-x64-701fr.exe
792	helper.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3476 wrote to memory of 792	3476	Winrar Code Craker.exe	77
PID 3476 wrote to memory of 792	3476	Winrar Code Craker.exe	77
PID 3476 wrote to memory of 4176	3476	Winrar Code Craker.exe	78
PID 3476 wrote to memory of 4176	3476	Winrar Code Craker.exe	78
PID 792 wrote to memory of 3880	792	helper.exe	80
PID 792 wrote to memory of 3880	792	helper.exe	80
PID 792 wrote to memory of 3248	792	helper.exe	82
PID 792 wrote to memory of 3248	792	helper.exe	82
PID 792 wrote to memory of 2816	792	helper.exe	84
PID 792 wrote to memory of 2816	792	helper.exe	84
PID 792 wrote to memory of 3864	792	helper.exe	86
PID 792 wrote to memory of 3864	792	helper.exe	86

C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe
"C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3476
- C:\Users\Admin\AppData\Roaming\helper.exe
  "C:\Users\Admin\AppData\Roaming\helper.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - 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:792
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3880
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3248
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2816
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3864
- C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe
  "C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
5ba388a6597d5e09191c2c88d2fdf598

SHA1
13516f8ec5a99298f6952438055c39330feae5d8

SHA256
e6b6223094e8fc598ad12b3849e49f03a141ccd21e0eaa336f81791ad8443eca

SHA512
ead2a2b5a1c2fad70c1cf570b2c9bfcb7364dd9f257a834eb819e55b8fee78e3f191f93044f07d51c259ca77a90ee8530f9204cbae080fba1d5705e1209f5b19

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
f0404139c8992e662223dacf857f0620

SHA1
7d48d64bf1166036ef276c0a27504880aea7df36

SHA256
7aad903820a111129ca02193788effb49f9b297795f26e311b92db10435a3b3f

SHA512
c340335d06840a2dbdf7cd689e5ed20961ef7ebc4eae178743f85f304bcf45252407ef67358b75849b68138ebf4ebdf6e5575cd2b88c5e7e38eefcf3f530727b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
34c8b93dd58a4703db0d6dd86bb21d70

SHA1
b53aa49b882070b857951b6638d6da3a03ac2f56

SHA256
34b95e4d12196f68f7a030b98190fda89c34b696251ab9ed831e48d983896898

SHA512
bba4a86b8a66104ed21fd58717168cdf68b93c801a94ec65e25c2b66c1b9354b9e7c1c01cadde451948e072d96c3fa4994c94ef33aeff9b603e7b5d82f7111e7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
8cb7f4b4ab204cacd1af6b29c2a2042c

SHA1
244540c38e33eac05826d54282a0bfa60340d6a1

SHA256
4994013dabe4f131d401879278eee147add6349124ea6452358dca7e2344c7a6

SHA512
7651cb6863a425840db610253151e271d3e8da26a8c633ce484247266fa226792ecb84b9578df3ab17fef84a5dfcad417b63a7df59c9650a907e08d59b91dd6e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_liioomsz.1kw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
81KB

MD5
bac22f7b34e1324af3401020d4831867

SHA1
6240c0d1ab52a65738a958ca3c5e360f7f0a2b6f

SHA256
9541d84a204d6271f0ba7bdfa7513d7f555e7f73fbf0142acdb347b61a9f821d

SHA512
2f8d100c90b8a816504f64b594f1a6f7e300bd4f080d4926581f279dca594b7c8342ec941f175782b599cfdb823b60582097d045ba8b57a1826521dd1d283ab5

Download Submit
C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe

Filesize
3.9MB

MD5
d512d8b27ad9910d66f8ce62086b413b

SHA1
4873eabfbb4280a0042a6b0bb65ca0eea0b72832

SHA256
1b8f832471a20e82b4252b81c63bb2cf6e3da335d889d877d5bacc4ae28f99a2

SHA512
4b69ee83456dfced538685984f381835bdc84fa9e4b297d1c213fda4e3dd166ce70a1639eb4ab8abbe59b64b7a9f87a7dbfefcbe45ee74d42d362138134f8ae4

Download Submit
memory/792-13-0x0000000000960000-0x000000000097A000-memory.dmp

Filesize
104KB

Download
memory/792-28-0x00007FFF4BCD0000-0x00007FFF4C792000-memory.dmp

Filesize
10.8MB

Download
memory/792-14-0x00007FFF4BCD0000-0x00007FFF4C792000-memory.dmp

Filesize
10.8MB

Download
memory/792-75-0x00007FFF4BCD0000-0x00007FFF4C792000-memory.dmp

Filesize
10.8MB

Download
memory/792-76-0x00007FFF4BCD0000-0x00007FFF4C792000-memory.dmp

Filesize
10.8MB

Download
memory/3476-0-0x00007FFF4BCD3000-0x00007FFF4BCD5000-memory.dmp

Filesize
8KB

Download
memory/3476-1-0x0000000000DD0000-0x00000000011D0000-memory.dmp

Filesize
4.0MB

Download
memory/3880-37-0x0000017BEAF30000-0x0000017BEAF52000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads