xworm | 3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b

General

Target

3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
Size

14KB
MD5

87e1d3ef8d9da36ebd82fab01d9bf38c
SHA1

65c12c31aad43d6e9385adae4efd2816bf0b2c70
SHA256

3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b
SHA512

17e9b07b7e8feaaec1b3061e155d4d4732fa61c9d9ea226fa37b5acbc81de2841ff292b64d9f6cd48824812121bbec8fa21d7d2ebf58627f604e0a99cee3e0ca
SSDEEP

384:sF7/fSjoqHiFPz0zN9wJ93r6DTiAJzfknTr:sFtyipzO+rRKknv

Score

10^/10

xworm defense_evasion discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

https://pastebin.com/raw/0XQWkvT7:0

Attributes

Install_directory
%ProgramData%
install_file
usbdriver.exe
pastebin_url
https://pastebin.com/raw/0XQWkvT7

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023c82-27.dat	family_xworm
behavioral2/memory/3824-39-0x0000000000C70000-0x0000000000C86000-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
3960	powershell.exe
2576	powershell.exe
2872	powershell.exe
2012	powershell.exe

Downloads MZ/PE file 3 IoCs

flow	pid	Process
10	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
10	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
10	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Control Panel\International\Geo\Nation	taskmgr.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
3824	taskmgr.exe
1692	svchost
4372	svchost

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-1-5-21-250031470-1197856012-2659781506-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost"	taskmgr.exe

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

Web Service

T1102

flow	ioc
9	raw.githubusercontent.com
10	raw.githubusercontent.com
41	pastebin.com
42	pastebin.com

Obfuscated Files or Information: Command Obfuscation 1 TTPs
Adversaries may obfuscate content during command execution to impede detection.
defense_evasion

Command Obfuscation
T1027.010

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Prefetch\taskmgr.exe	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
File created	C:\Windows\en-US\taskmgr.exe	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3192	schtasks.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2152	powershell.exe
2152	powershell.exe
2872	powershell.exe
2872	powershell.exe
2872	powershell.exe
2012	powershell.exe
2012	powershell.exe
2012	powershell.exe
3960	powershell.exe
3960	powershell.exe
3960	powershell.exe
2576	powershell.exe
2576	powershell.exe
2576	powershell.exe
3824	taskmgr.exe
3824	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
Token: SeDebugPrivilege	2152	powershell.exe
Token: SeDebugPrivilege	3824	taskmgr.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2012	powershell.exe
Token: SeDebugPrivilege	3960	powershell.exe
Token: SeDebugPrivilege	2576	powershell.exe
Token: SeDebugPrivilege	3824	taskmgr.exe
Token: SeDebugPrivilege	1692	svchost
Token: SeDebugPrivilege	4372	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3824	taskmgr.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 2152	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe	86
PID 3616 wrote to memory of 2152	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe	86
PID 3616 wrote to memory of 2152	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe	86
PID 3616 wrote to memory of 3824	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe	88
PID 3616 wrote to memory of 3824	3616	3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe	88
PID 3824 wrote to memory of 2872	3824	taskmgr.exe	98
PID 3824 wrote to memory of 2872	3824	taskmgr.exe	98
PID 3824 wrote to memory of 2012	3824	taskmgr.exe	100
PID 3824 wrote to memory of 2012	3824	taskmgr.exe	100
PID 3824 wrote to memory of 3960	3824	taskmgr.exe	102
PID 3824 wrote to memory of 3960	3824	taskmgr.exe	102
PID 3824 wrote to memory of 2576	3824	taskmgr.exe	104
PID 3824 wrote to memory of 2576	3824	taskmgr.exe	104
PID 3824 wrote to memory of 3192	3824	taskmgr.exe	106
PID 3824 wrote to memory of 3192	3824	taskmgr.exe	106

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\3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe
"C:\Users\Admin\AppData\Local\Temp\3848b629a98db7021e3387ffede2ef3d5d9f40234ee1a406c1cb780cf32e230b.exe"
1⤵
- Downloads MZ/PE file
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3616
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -NoProfile -ExecutionPolicy Bypass -EncodedCommand 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
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2152
- C:\Windows\en-US\taskmgr.exe
  "C:\Windows\en-US\taskmgr.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3824
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\en-US\taskmgr.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2872
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'taskmgr.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2012
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3960
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2576
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3192

C:\ProgramData\svchost
C:\ProgramData\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1692

C:\ProgramData\svchost
C:\ProgramData\svchost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4372

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Obfuscated Files or Information

1

T1027

Command Obfuscation

1

T1027.010

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
92075279f2dbcaa5724ee5a47e49712f

SHA1
8dd3e2faa8432dde978946ebaf9054f7c6e0b2cb

SHA256
fd985ddd090621af25aa77aebff689c95ea7679ff0e81887124b2802ae3e9442

SHA512
744c62556233d9872f43ffb5a5a98aee20a44834436306f0a948c8c4072bdb46ef8044616593747edd645caaee60faf8b14fedb2d6df5f6019b5c73357d80d22

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

Filesize
944B

MD5
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

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

Filesize
19KB

MD5
5daea188aec495dadf30a61eab508e29

SHA1
e82f03367fb706b7ab2c6b8cb11e69b0e2bd23a7

SHA256
b048604d3d831d25d7529e6db23c61f5c9d042dada4707a75667fdaddf32fc0c

SHA512
a6dc8ab870715a32808a8a709ce0722afa3bbe8bce0fae7c65655ed4d061316fe044a7dca17ae3dd5666ac2c6199766e780762327a1815ed3a9e4dc9f9004695

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

Filesize
944B

MD5
9b80cd7a712469a4c45fec564313d9eb

SHA1
6125c01bc10d204ca36ad1110afe714678655f2d

SHA256
5a9e4969c6cdb5d522c81ce55799effb7255c1b0a9966a936d1dc3ff8fe2112d

SHA512
ac280d2623c470c9dec94726a7af0612938723f3c7d60d727eb3c21f17be2f2049f97bc8303558be8b01f94406781ece0ada9a3bc51e930aff20bebb6ca17584

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2z3f52vb.moi.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Windows\en-US\taskmgr.exe

Filesize
64KB

MD5
8859bbc9b3df43ab196b2e9b0837363f

SHA1
d44588f07febd4b246e2cc2900e06434597a9a9b

SHA256
7c11964fcaf2c87de128e612dd875960b697f5af535ca910917ff81846e2d5ad

SHA512
90efb44af89c975a24fe9ea168f1af1f32f4123dd30959c4489bc0ca301fe144545739910cf553f457e97724101ba4e15b2122e8d1973a24d80ff1387958f628

Download Submit
memory/2152-42-0x00000000071D0000-0x0000000007202000-memory.dmp

Filesize
200KB

Download
memory/2152-63-0x00000000075C0000-0x00000000075C8000-memory.dmp

Filesize
32KB

Download
memory/2152-10-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/2152-8-0x0000000004F60000-0x0000000004FC6000-memory.dmp

Filesize
408KB

Download
memory/2152-17-0x0000000005970000-0x0000000005CC4000-memory.dmp

Filesize
3.3MB

Download
memory/2152-21-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/2152-4-0x00000000029B0000-0x00000000029E6000-memory.dmp

Filesize
216KB

Download
memory/2152-9-0x0000000004FD0000-0x0000000005036000-memory.dmp

Filesize
408KB

Download
memory/2152-5-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/2152-6-0x0000000005210000-0x0000000005838000-memory.dmp

Filesize
6.2MB

Download
memory/2152-66-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/2152-40-0x0000000006000000-0x000000000601E000-memory.dmp

Filesize
120KB

Download
memory/2152-41-0x0000000006030000-0x000000000607C000-memory.dmp

Filesize
304KB

Download
memory/2152-43-0x000000006F410000-0x000000006F45C000-memory.dmp

Filesize
304KB

Download
memory/2152-7-0x0000000004EC0000-0x0000000004EE2000-memory.dmp

Filesize
136KB

Download
memory/2152-53-0x00000000065D0000-0x00000000065EE000-memory.dmp

Filesize
120KB

Download
memory/2152-54-0x0000000007210000-0x00000000072B3000-memory.dmp

Filesize
652KB

Download
memory/2152-55-0x00000000079D0000-0x000000000804A000-memory.dmp

Filesize
6.5MB

Download
memory/2152-56-0x0000000007350000-0x000000000736A000-memory.dmp

Filesize
104KB

Download
memory/2152-57-0x00000000073D0000-0x00000000073DA000-memory.dmp

Filesize
40KB

Download
memory/2152-58-0x0000000007600000-0x0000000007696000-memory.dmp

Filesize
600KB

Download
memory/2152-59-0x0000000007530000-0x0000000007541000-memory.dmp

Filesize
68KB

Download
memory/2152-60-0x0000000007570000-0x000000000757E000-memory.dmp

Filesize
56KB

Download
memory/2152-61-0x0000000007580000-0x0000000007594000-memory.dmp

Filesize
80KB

Download
memory/2152-62-0x00000000075D0000-0x00000000075EA000-memory.dmp

Filesize
104KB

Download
memory/2872-74-0x000001D013010000-0x000001D013032000-memory.dmp

Filesize
136KB

Download
memory/3616-0-0x000000007488E000-0x000000007488F000-memory.dmp

Filesize
4KB

Download
memory/3616-67-0x000000007488E000-0x000000007488F000-memory.dmp

Filesize
4KB

Download
memory/3616-68-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/3616-38-0x0000000007000000-0x000000000700A000-memory.dmp

Filesize
40KB

Download
memory/3616-22-0x0000000074880000-0x0000000075030000-memory.dmp

Filesize
7.7MB

Download
memory/3616-3-0x00000000058C0000-0x0000000005952000-memory.dmp

Filesize
584KB

Download
memory/3616-2-0x0000000005F30000-0x00000000064D4000-memory.dmp

Filesize
5.6MB

Download
memory/3616-1-0x0000000000EF0000-0x0000000000EFA000-memory.dmp

Filesize
40KB

Download
memory/3824-39-0x0000000000C70000-0x0000000000C86000-memory.dmp

Filesize
88KB

Download
memory/3824-37-0x00007FFCCAA93000-0x00007FFCCAA95000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads