xworm | c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390

General

Target

15415145.exe
Size

59KB
MD5

6c091ad6fae0fa76f44870d1a1b05cb4
SHA1

040f60c0ee3f4902f919025057e34ab4d11b1abd
SHA256

c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390
SHA512

3a414f40f99e5847d9631c4ac1143c76e77db7ae42dd8c7aed2ebf1742ec73bb802d54d6cbde3b04f6b894a4cf731aa4e9dbad95166bade13f787b489d8e8d86
SSDEEP

1536:skyZtyUQ8sBkROLW+UzbTH3gfm2qt0OgSko7:skItfQ8sBkROUzbTQf+6OgK7

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

known-savage.gl.at.ply.gg:45116

association-lectures.gl.at.ply.gg:32463

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 6 IoCs

resource	yara_rule
behavioral2/memory/1204-1-0x0000000000AA0000-0x0000000000AB6000-memory.dmp	family_xworm
behavioral2/files/0x0003000000022a06-8.dat	family_xworm
behavioral2/files/0x0009000000023ce4-22.dat	family_xworm
behavioral2/memory/4464-29-0x00000000009D0000-0x00000000009DE000-memory.dmp	family_xworm
behavioral2/files/0x00050000000229d7-108.dat	family_xworm
behavioral2/memory/3808-115-0x0000000000AE0000-0x0000000000B0E000-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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3524	powershell.exe
384	powershell.exe
2616	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	15415145.exe
Key value queried	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	frwdjp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\Control Panel\International\Geo\Nation	kzgdhb.exe

Drops startup file 6 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\15415145.lnk	15415145.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\frwdjp.lnk	frwdjp.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\frwdjp.lnk	frwdjp.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kzgdhb.lnk	kzgdhb.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\kzgdhb.lnk	kzgdhb.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\15415145.lnk	15415145.exe

Executes dropped EXE 8 IoCs

pid	Process
2020	15415145.exe
4464	frwdjp.exe
1432	vshnzz.exe
4140	gljzlq.exe
4348	15415145.exe
3108	frwdjp.exe
3808	kzgdhb.exe
3712	sbbwse.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kzgdhb = "C:\\Users\\Admin\\AppData\\Roaming\\kzgdhb.exe"	kzgdhb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\15415145 = "C:\\Users\\Admin\\AppData\\Roaming\\15415145.exe"	15415145.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-22591836-1183090055-1220658180-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\frwdjp = "C:\\Users\\Admin\\AppData\\Roaming\\frwdjp.exe"	frwdjp.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 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3768	schtasks.exe
1856	schtasks.exe
3488	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
3524	powershell.exe
3524	powershell.exe
3524	powershell.exe
384	powershell.exe
384	powershell.exe
384	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe

Suspicious use of AdjustPrivilegeToken 15 IoCs

description	pid	Process
Token: SeDebugPrivilege	1204	15415145.exe
Token: SeDebugPrivilege	1204	15415145.exe
Token: SeDebugPrivilege	2020	15415145.exe
Token: SeDebugPrivilege	4464	frwdjp.exe
Token: SeDebugPrivilege	3524	powershell.exe
Token: SeDebugPrivilege	1432	vshnzz.exe
Token: SeDebugPrivilege	384	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	4140	gljzlq.exe
Token: SeDebugPrivilege	4464	frwdjp.exe
Token: SeDebugPrivilege	4348	15415145.exe
Token: SeDebugPrivilege	3108	frwdjp.exe
Token: SeDebugPrivilege	3808	kzgdhb.exe
Token: SeDebugPrivilege	3808	kzgdhb.exe
Token: SeDebugPrivilege	3712	sbbwse.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 1856	1204	15415145.exe	91
PID 1204 wrote to memory of 1856	1204	15415145.exe	91
PID 1204 wrote to memory of 4464	1204	15415145.exe	99
PID 1204 wrote to memory of 4464	1204	15415145.exe	99
PID 4464 wrote to memory of 3524	4464	frwdjp.exe	100
PID 4464 wrote to memory of 3524	4464	frwdjp.exe	100
PID 1204 wrote to memory of 1432	1204	15415145.exe	102
PID 1204 wrote to memory of 1432	1204	15415145.exe	102
PID 4464 wrote to memory of 384	4464	frwdjp.exe	103
PID 4464 wrote to memory of 384	4464	frwdjp.exe	103
PID 4464 wrote to memory of 2616	4464	frwdjp.exe	105
PID 4464 wrote to memory of 2616	4464	frwdjp.exe	105
PID 4464 wrote to memory of 3488	4464	frwdjp.exe	107
PID 4464 wrote to memory of 3488	4464	frwdjp.exe	107
PID 1204 wrote to memory of 4140	1204	15415145.exe	109
PID 1204 wrote to memory of 4140	1204	15415145.exe	109
PID 1204 wrote to memory of 3808	1204	15415145.exe	112
PID 1204 wrote to memory of 3808	1204	15415145.exe	112
PID 3808 wrote to memory of 3768	3808	kzgdhb.exe	113
PID 3808 wrote to memory of 3768	3808	kzgdhb.exe	113
PID 1204 wrote to memory of 3712	1204	15415145.exe	115
PID 1204 wrote to memory of 3712	1204	15415145.exe	115

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\15415145.exe
"C:\Users\Admin\AppData\Local\Temp\15415145.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "15415145" /tr "C:\Users\Admin\AppData\Roaming\15415145.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1856
- C:\Users\Admin\AppData\Local\Temp\frwdjp.exe
  "C:\Users\Admin\AppData\Local\Temp\frwdjp.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4464
- - 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\frwdjp.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3524
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'frwdjp.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:384
- - 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\frwdjp.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2616
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "frwdjp" /tr "C:\Users\Admin\AppData\Roaming\frwdjp.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3488
- C:\Users\Admin\AppData\Local\Temp\vshnzz.exe
  "C:\Users\Admin\AppData\Local\Temp\vshnzz.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1432
- C:\Users\Admin\AppData\Local\Temp\gljzlq.exe
  "C:\Users\Admin\AppData\Local\Temp\gljzlq.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:4140
- C:\Users\Admin\AppData\Local\Temp\kzgdhb.exe
  "C:\Users\Admin\AppData\Local\Temp\kzgdhb.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3808
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "kzgdhb" /tr "C:\Users\Admin\AppData\Roaming\kzgdhb.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3768
- C:\Users\Admin\AppData\Local\Temp\sbbwse.exe
  "C:\Users\Admin\AppData\Local\Temp\sbbwse.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3712

C:\Users\Admin\AppData\Roaming\15415145.exe
C:\Users\Admin\AppData\Roaming\15415145.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2020

C:\Users\Admin\AppData\Roaming\15415145.exe
C:\Users\Admin\AppData\Roaming\15415145.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4348

C:\Users\Admin\AppData\Roaming\frwdjp.exe
C:\Users\Admin\AppData\Roaming\frwdjp.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3108

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\15415145.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
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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

Filesize
944B

MD5
5d5b61092cc0142378f74fa9a792a1b9

SHA1
02bf621250d2bde7697a60fef610cd6b8ecf6efc

SHA256
efc6d92a184b3a69127d876057104049dc02f3301b9b4c8ff2bfab5027a8564c

SHA512
fbe6a00c8d329c9064c0414b8210553eb2acfe1be1dae6520e2e41512033256bc92b1a0b1bc497e3367b2a7fcb72c114d5a7d40524ba374039238a35f396c6c1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_f01sduat.qyj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\frwdjp.exe

Filesize
34KB

MD5
950d739da650457fab6a225545794238

SHA1
e965286161ecda1b8c0072d8a2d80c191bb15705

SHA256
a571fcac5384158c4927e7c7cf07182b68eccf67845ba927beae44cd9835e3f8

SHA512
b7b91343176c5a7f6408b21fbc96c23d0b02c080b846e29f304ba91de1d0f37a772953e7ab65d1d627cb3490fbef3b85681564e878d8dcda57c0897dbad1d19b

Download Submit
C:\Users\Admin\AppData\Local\Temp\kzgdhb.exe

Filesize
159KB

MD5
49a6b6e8627762b929999b0b1fe6d604

SHA1
4a47bbb17c6cbda79794428df97d203b7261af79

SHA256
ca6aa52d419303376de2c37b4c8f6bdd41e31e55de6d178520ad5056303b6571

SHA512
c967dcb9be6b1fa73f1ef50a7785c17919365857be63923c6cad53362931d9a1c9fb41a43d68a050ad2a50239580fc8294e61e2ba10ee19d185f4f91c035b85b

Download Submit
C:\Users\Admin\AppData\Roaming\15415145.exe

Filesize
59KB

MD5
6c091ad6fae0fa76f44870d1a1b05cb4

SHA1
040f60c0ee3f4902f919025057e34ab4d11b1abd

SHA256
c352c942b6df33510094c7100fb9d48e36b8e1e2af40a60ccc360b58721c2390

SHA512
3a414f40f99e5847d9631c4ac1143c76e77db7ae42dd8c7aed2ebf1742ec73bb802d54d6cbde3b04f6b894a4cf731aa4e9dbad95166bade13f787b489d8e8d86

Download Submit
memory/1204-0-0x00007FFB2A513000-0x00007FFB2A515000-memory.dmp

Filesize
8KB

Download
memory/1204-12-0x00007FFB2A510000-0x00007FFB2AFD1000-memory.dmp

Filesize
10.8MB

Download
memory/1204-11-0x00007FFB2A513000-0x00007FFB2A515000-memory.dmp

Filesize
8KB

Download
memory/1204-10-0x00007FFB2A510000-0x00007FFB2AFD1000-memory.dmp

Filesize
10.8MB

Download
memory/1204-1-0x0000000000AA0000-0x0000000000AB6000-memory.dmp

Filesize
88KB

Download
memory/2020-15-0x00007FFB2A510000-0x00007FFB2AFD1000-memory.dmp

Filesize
10.8MB

Download
memory/2020-17-0x00007FFB2A510000-0x00007FFB2AFD1000-memory.dmp

Filesize
10.8MB

Download
memory/3524-36-0x000001FDDDCD0000-0x000001FDDDCF2000-memory.dmp

Filesize
136KB

Download
memory/3808-115-0x0000000000AE0000-0x0000000000B0E000-memory.dmp

Filesize
184KB

Download
memory/4464-29-0x00000000009D0000-0x00000000009DE000-memory.dmp

Filesize
56KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads