xworm | 37a61a8e9a2c0d24dba2ef51d0bdde5fde4182f0218bee900f4213cc783963ff

General

Target

helloworld.exe
Size

71KB
MD5

9abc77c7a2d864322641837bda3d51b1
SHA1

3f295fdab7c126e9bbe2a02b0faf4147f120cb90
SHA256

37a61a8e9a2c0d24dba2ef51d0bdde5fde4182f0218bee900f4213cc783963ff
SHA512

69c865f20c97a1e569eb9d2e5a9813747b9882c75e822edca08bbe92ca6b71f72c0ee7c8cfe1d5b6a953acf64ba3a6820b39c8492334240622c8262e31ba1723
SSDEEP

1536:8nNYWPeZZ8GTqR8xGXf1qTHjIpAB+bZT5AR6WpZOVOE4jf:8HLGTk3g/IpAB+bZQfOoxf

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

PovodPoestGovna-63080.portmap.io:63080:9989

Attributes

Install_directory
%AppData%
install_file
Windows Defender.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/3952-1-0x0000000000010000-0x0000000000028000-memory.dmp	family_xworm
behavioral2/files/0x000700000001e196-60.dat	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
3156	powershell.exe
3848	powershell.exe
1644	powershell.exe
832	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	helloworld.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2648	Windows Defender.exe
3228	Windows Defender.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-1-5-21-2593460650-190333679-3676257533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender.exe"	helloworld.exe

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

System Information Discovery
T1082

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
1140	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3156	powershell.exe
3156	powershell.exe
3848	powershell.exe
3848	powershell.exe
1644	powershell.exe
1644	powershell.exe
832	powershell.exe
832	powershell.exe
3952	helloworld.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	helloworld.exe
Token: SeDebugPrivilege	3156	powershell.exe
Token: SeDebugPrivilege	3848	powershell.exe
Token: SeDebugPrivilege	1644	powershell.exe
Token: SeDebugPrivilege	832	powershell.exe
Token: SeDebugPrivilege	3952	helloworld.exe
Token: SeDebugPrivilege	2648	Windows Defender.exe
Token: SeDebugPrivilege	3228	Windows Defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3952	helloworld.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 3156	3952	helloworld.exe	91
PID 3952 wrote to memory of 3156	3952	helloworld.exe	91
PID 3952 wrote to memory of 3848	3952	helloworld.exe	95
PID 3952 wrote to memory of 3848	3952	helloworld.exe	95
PID 3952 wrote to memory of 1644	3952	helloworld.exe	97
PID 3952 wrote to memory of 1644	3952	helloworld.exe	97
PID 3952 wrote to memory of 832	3952	helloworld.exe	99
PID 3952 wrote to memory of 832	3952	helloworld.exe	99
PID 3952 wrote to memory of 1140	3952	helloworld.exe	102
PID 3952 wrote to memory of 1140	3952	helloworld.exe	102

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\helloworld.exe
"C:\Users\Admin\AppData\Local\Temp\helloworld.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3952
- 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\helloworld.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3156
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'helloworld.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3848
- 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\Windows Defender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1644
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Defender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:832
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Defender" /tr "C:\Users\Admin\AppData\Roaming\Windows Defender.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1140

C:\Users\Admin\AppData\Roaming\Windows Defender.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2648

C:\Users\Admin\AppData\Roaming\Windows Defender.exe
"C:\Users\Admin\AppData\Roaming\Windows Defender.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3228

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

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
dfb30c18614475472dee5423d049f45c

SHA1
affccaa7dbd65e1ed5cdee35177b87b908d3049b

SHA256
42a781a6898e1c0db15fb94f5e8203e8e135e12b89d8133bf2fbd581f08ddfb4

SHA512
0a25a330f0255380ebf1ae943de170da50db9efffdda642366eb37f5f45971b8301bddcbb63b5a3d18a6c374cd543a4877fdba879452525f56fada46411a46b6

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

Filesize
944B

MD5
6f3b96b24f06e2d37a46e43e8b784f56

SHA1
7be6702c5867f359e913eeeecdd5b76698589295

SHA256
8e386afeed28e1d282d9a0294dd2e9402dcb807f7c77aca8426314c20057e720

SHA512
d760999531a77a9adf2b4dc019ce3b43ac3a8cad825398b3a09818afe8deaa177d37219a26dd8a432c00c9cff7858efc43cae2375edc996bb0136c92c39c9dfb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jozdy30a.jsp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender.exe

Filesize
71KB

MD5
9abc77c7a2d864322641837bda3d51b1

SHA1
3f295fdab7c126e9bbe2a02b0faf4147f120cb90

SHA256
37a61a8e9a2c0d24dba2ef51d0bdde5fde4182f0218bee900f4213cc783963ff

SHA512
69c865f20c97a1e569eb9d2e5a9813747b9882c75e822edca08bbe92ca6b71f72c0ee7c8cfe1d5b6a953acf64ba3a6820b39c8492334240622c8262e31ba1723

Download Submit
memory/3156-12-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3156-18-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3156-17-0x0000019E60720000-0x0000019E6093C000-memory.dmp

Filesize
2.1MB

Download
memory/3156-14-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3156-13-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3156-11-0x0000019E606D0000-0x0000019E606F2000-memory.dmp

Filesize
136KB

Download
memory/3952-0-0x00007FF935533000-0x00007FF935535000-memory.dmp

Filesize
8KB

Download
memory/3952-57-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3952-58-0x00007FF935533000-0x00007FF935535000-memory.dmp

Filesize
8KB

Download
memory/3952-59-0x00007FF935530000-0x00007FF935FF1000-memory.dmp

Filesize
10.8MB

Download
memory/3952-1-0x0000000000010000-0x0000000000028000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads