xworm | c1e1442f1a4b2c4b3d6b1a5f15c6039a0e531c3db3a4e97dea89e1eb98708df4

General

Target

Ragnarok.exe
Size

71KB
MD5

871f5ec58f0e3086fdccc877a7baae5d
SHA1

22036d5d3ebcb7d7a6c87e021198642ed081e299
SHA256

c1e1442f1a4b2c4b3d6b1a5f15c6039a0e531c3db3a4e97dea89e1eb98708df4
SHA512

e56985ca26042faca6fa170af5db1b5187990ffab5c6d39bf63999d3f1da2281f873a5b999795e7766f0d99eb05ba42161df4ef2dd46da4d23b1092026677dc7
SSDEEP

1536:0i2BN6LRRM6YDpEOCgMqV0mVZW/F+b4wypLiy+4NZECUvOBXFws:Z2P6LRvpOCgpul9+b4wK+MEXOBXKs

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

posted-channels.gl.at.ply.gg:38837

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4036-1-0x00000000003B0000-0x00000000003C8000-memory.dmp	family_xworm
behavioral1/files/0x000b000000027dc2-9.dat	family_xworm

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

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-1-5-21-1095212214-1383118828-1037266802-1000\Control Panel\International\Geo\Nation	Ragnarok.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 15 IoCs

pid	Process
2684	XClient.exe
1672	XClient.exe
1520	XClient.exe
1524	XClient.exe
2500	XClient.exe
4292	XClient.exe
4636	XClient.exe
3344	XClient.exe
2308	XClient.exe
4964	XClient.exe
4640	XClient.exe
4108	XClient.exe
4748	XClient.exe
3368	XClient.exe
4672	XClient.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-1-5-21-1095212214-1383118828-1037266802-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	Ragnarok.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
1592	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4036	Ragnarok.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	Ragnarok.exe
Token: SeDebugPrivilege	4036	Ragnarok.exe
Token: SeDebugPrivilege	2684	XClient.exe
Token: SeDebugPrivilege	1672	XClient.exe
Token: SeDebugPrivilege	1520	XClient.exe
Token: SeDebugPrivilege	1524	XClient.exe
Token: SeDebugPrivilege	2500	XClient.exe
Token: SeDebugPrivilege	4292	XClient.exe
Token: SeDebugPrivilege	4636	XClient.exe
Token: SeDebugPrivilege	3344	XClient.exe
Token: SeDebugPrivilege	2308	XClient.exe
Token: SeDebugPrivilege	4964	XClient.exe
Token: SeDebugPrivilege	4640	XClient.exe
Token: SeDebugPrivilege	4108	XClient.exe
Token: SeDebugPrivilege	4748	XClient.exe
Token: SeDebugPrivilege	3368	XClient.exe
Token: SeDebugPrivilege	4672	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4036	Ragnarok.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 1592	4036	Ragnarok.exe	84
PID 4036 wrote to memory of 1592	4036	Ragnarok.exe	84

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\Ragnarok.exe
"C:\Users\Admin\AppData\Local\Temp\Ragnarok.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:4036
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1592

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2684

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1672

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1520

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1524

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2500

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4292

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4636

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3344

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2308

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4964

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4640

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4108

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4748

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3368

C:\Users\Admin\AppData\Roaming\XClient.exe
"C:\Users\Admin\AppData\Roaming\XClient.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\XClient.exe.log

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
71KB

MD5
871f5ec58f0e3086fdccc877a7baae5d

SHA1
22036d5d3ebcb7d7a6c87e021198642ed081e299

SHA256
c1e1442f1a4b2c4b3d6b1a5f15c6039a0e531c3db3a4e97dea89e1eb98708df4

SHA512
e56985ca26042faca6fa170af5db1b5187990ffab5c6d39bf63999d3f1da2281f873a5b999795e7766f0d99eb05ba42161df4ef2dd46da4d23b1092026677dc7

Download Submit
memory/2684-11-0x00007FF8F0E40000-0x00007FF8F1902000-memory.dmp

Filesize
10.8MB

Download
memory/2684-13-0x00007FF8F0E40000-0x00007FF8F1902000-memory.dmp

Filesize
10.8MB

Download
memory/4036-0-0x00007FF8F0E43000-0x00007FF8F0E45000-memory.dmp

Filesize
8KB

Download
memory/4036-1-0x00000000003B0000-0x00000000003C8000-memory.dmp

Filesize
96KB

Download
memory/4036-6-0x00007FF8F0E40000-0x00007FF8F1902000-memory.dmp

Filesize
10.8MB

Download
memory/4036-7-0x00007FF8F0E43000-0x00007FF8F0E45000-memory.dmp

Filesize
8KB

Download
memory/4036-8-0x00007FF8F0E40000-0x00007FF8F1902000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads