xworm | 8641f88b89c9076ece3ee571baa4b3c93ba3ac3883e90fe5f894dc41e3b7bdc7

Resubmissions

15-04-2024 22:57

240415-2xks3sce9t 10

15-04-2024 22:52

240415-2tjrlsae29 10

Analysis

max time kernel
149s
max time network
147s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-04-2024 22:52

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General

Target

Ro-exec/loader-upd.exe
Size

70KB
MD5

573bd20fc8382d92a7ae9eae51e738e3
SHA1

55006093429df791f27e91a66e5ee63a81382b28
SHA256

09036ffa342f9e5bb1e31a867dcc3b60db011baba8c0d202aff1d33195cbe729
SHA512

d38736acff4128d6ce9ea17ee609ca33a37ac88f2c994cf4caf7f0eb62406a8963c33531b9f3cd020974d892c2751f3a4f67ce13ed6ba6080f97c406ccbb4aca
SSDEEP

1536:PmMfwrNATngx6fPLgD9vYebv2S5NiwWW6N9dOoihkAO:LCmn463UD6ebv242FzOoiSAO

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Public%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/UWpQULMP

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral15/memory/1960-0-0x00000000000A0000-0x00000000000B8000-memory.dmp	family_xworm
behavioral15/files/0x000b00000001225e-100.dat	family_xworm
behavioral15/memory/2324-102-0x00000000002E0000-0x00000000002F8000-memory.dmp	family_xworm
behavioral15/memory/2156-106-0x0000000000360000-0x0000000000378000-memory.dmp	family_xworm

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

Executes dropped EXE 2 IoCs

pid	Process
2324	svchost.exe
2156	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-1-5-21-1658372521-4246568289-2509113762-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Public\\svchost.exe"	loader-upd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com
8	7.tcp.eu.ngrok.io
17	7.tcp.eu.ngrok.io

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
1976	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1960	loader-upd.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2608	powershell.exe
2628	powershell.exe
1716	powershell.exe
908	powershell.exe
1960	loader-upd.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2520	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1960	loader-upd.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	1716	powershell.exe
Token: SeDebugPrivilege	908	powershell.exe
Token: SeDebugPrivilege	1960	loader-upd.exe
Token: SeDebugPrivilege	2520	taskmgr.exe
Token: SeDebugPrivilege	2324	svchost.exe
Token: SeDebugPrivilege	2156	svchost.exe

Suspicious use of FindShellTrayWindow 64 IoCs

pid	Process
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe

Suspicious use of SendNotifyMessage 64 IoCs

pid	Process
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe
2520	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1960	loader-upd.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 2608	1960	loader-upd.exe	28
PID 1960 wrote to memory of 2608	1960	loader-upd.exe	28
PID 1960 wrote to memory of 2608	1960	loader-upd.exe	28
PID 1960 wrote to memory of 2628	1960	loader-upd.exe	30
PID 1960 wrote to memory of 2628	1960	loader-upd.exe	30
PID 1960 wrote to memory of 2628	1960	loader-upd.exe	30
PID 1960 wrote to memory of 1716	1960	loader-upd.exe	32
PID 1960 wrote to memory of 1716	1960	loader-upd.exe	32
PID 1960 wrote to memory of 1716	1960	loader-upd.exe	32
PID 1960 wrote to memory of 908	1960	loader-upd.exe	34
PID 1960 wrote to memory of 908	1960	loader-upd.exe	34
PID 1960 wrote to memory of 908	1960	loader-upd.exe	34
PID 1960 wrote to memory of 1976	1960	loader-upd.exe	36
PID 1960 wrote to memory of 1976	1960	loader-upd.exe	36
PID 1960 wrote to memory of 1976	1960	loader-upd.exe	36
PID 2252 wrote to memory of 2324	2252	taskeng.exe	42
PID 2252 wrote to memory of 2324	2252	taskeng.exe	42
PID 2252 wrote to memory of 2324	2252	taskeng.exe	42
PID 2252 wrote to memory of 2156	2252	taskeng.exe	43
PID 2252 wrote to memory of 2156	2252	taskeng.exe	43
PID 2252 wrote to memory of 2156	2252	taskeng.exe	43

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\Ro-exec\loader-upd.exe
"C:\Users\Admin\AppData\Local\Temp\Ro-exec\loader-upd.exe"
1⤵
- 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:1960
- 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\Local\Temp\Ro-exec\loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loader-upd.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1716
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:908
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Public\svchost.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1976

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2520

C:\Windows\system32\taskeng.exe
taskeng.exe {81139A6A-EE82-4FF2-B001-0535123B1290} S-1-5-21-1658372521-4246568289-2509113762-1000:PIRBKNPS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Users\Public\svchost.exe
  C:\Users\Public\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2324
- C:\Users\Public\svchost.exe
  C:\Users\Public\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2156

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

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\Tar9A44.tmp

Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
3db8b33c5920432abc472eaa5d3026d4

SHA1
472d5668c51b6be023b838356657344072babac5

SHA256
5b7eafbfc0cf51e4ab67994dfd286194f44ddeb438653bbc036d8a8f2622bb04

SHA512
bd73f18d87ead495e2835615ebbf61e385744fdd4c721e243d496d7701455d87ffb4c9997ce7941067e98ffdf085afa545e404abd21d2ab3e90432a08fcb591d

Download Submit
C:\Users\Public\svchost.exe

Filesize
70KB

MD5
573bd20fc8382d92a7ae9eae51e738e3

SHA1
55006093429df791f27e91a66e5ee63a81382b28

SHA256
09036ffa342f9e5bb1e31a867dcc3b60db011baba8c0d202aff1d33195cbe729

SHA512
d38736acff4128d6ce9ea17ee609ca33a37ac88f2c994cf4caf7f0eb62406a8963c33531b9f3cd020974d892c2751f3a4f67ce13ed6ba6080f97c406ccbb4aca

Download Submit
memory/908-54-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/908-53-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/908-52-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/908-51-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/908-50-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/908-49-0x0000000002810000-0x0000000002890000-memory.dmp

Filesize
512KB

Download
memory/908-48-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/1716-40-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1716-38-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1716-41-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/1716-37-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1716-36-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/1716-35-0x0000000002760000-0x00000000027E0000-memory.dmp

Filesize
512KB

Download
memory/1716-34-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/1960-1-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1960-56-0x000000001B310000-0x000000001B390000-memory.dmp

Filesize
512KB

Download
memory/1960-39-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1960-0-0x00000000000A0000-0x00000000000B8000-memory.dmp

Filesize
96KB

Download
memory/1960-96-0x000000001B310000-0x000000001B390000-memory.dmp

Filesize
512KB

Download
memory/2156-106-0x0000000000360000-0x0000000000378000-memory.dmp

Filesize
96KB

Download
memory/2156-107-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2156-108-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2324-102-0x00000000002E0000-0x00000000002F8000-memory.dmp

Filesize
96KB

Download
memory/2324-103-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2324-104-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-94-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2520-95-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2520-98-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2520-97-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2608-8-0x0000000001ED0000-0x0000000001ED8000-memory.dmp

Filesize
32KB

Download
memory/2608-12-0x0000000002890000-0x0000000002910000-memory.dmp

Filesize
512KB

Download
memory/2608-13-0x0000000002890000-0x0000000002910000-memory.dmp

Filesize
512KB

Download
memory/2608-14-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/2608-9-0x0000000002890000-0x0000000002910000-memory.dmp

Filesize
512KB

Download
memory/2608-6-0x000000001B310000-0x000000001B5F2000-memory.dmp

Filesize
2.9MB

Download
memory/2608-11-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/2608-10-0x0000000002890000-0x0000000002910000-memory.dmp

Filesize
512KB

Download
memory/2608-7-0x000007FEF1E00000-0x000007FEF279D000-memory.dmp

Filesize
9.6MB

Download
memory/2628-20-0x000000001B300000-0x000000001B5E2000-memory.dmp

Filesize
2.9MB

Download
memory/2628-22-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/2628-28-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/2628-27-0x0000000002590000-0x0000000002610000-memory.dmp

Filesize
512KB

Download
memory/2628-26-0x0000000002590000-0x0000000002610000-memory.dmp

Filesize
512KB

Download
memory/2628-25-0x0000000002590000-0x0000000002610000-memory.dmp

Filesize
512KB

Download
memory/2628-24-0x000007FEEEF00000-0x000007FEEF89D000-memory.dmp

Filesize
9.6MB

Download
memory/2628-23-0x0000000002590000-0x0000000002610000-memory.dmp

Filesize
512KB

Download
memory/2628-21-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download