xworm | 1731919d2dc81ad27833aaaf162c923c8c0e9ec12f0517c7db0409b74e9550c6

Analysis

max time kernel
154s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 18:28

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General

Target

zvgfd-main/Frozen Loader V2.exe
Size

35KB
MD5

fe1520b26e792424cfbf8fd7564b4a55
SHA1

da29f83984b250746f84906584481a0db9258b7c
SHA256

f2ece46035c2c59af63a43525c218247686faf36a256bb77a6103910e306c598
SHA512

10bb8a5a498ca268cf3d8f55cac252ec67ef6a608ed99a12d9eaff159a44700f09da47c0c06b9c15488c8e2dec2e9feb9fb8dd36152e9459ac5b151017d2b761
SSDEEP

768:2DMfF7zLKYs2Byj5fuddqLi9Fk9wnO/h4/22N7:2kF7HKYs/1od9Fk9wnO/+u2J

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

127.0.0.1:4782

192.168.1.66:4782

Mutex

56wFqcXlNlL4av7L

Attributes

Install_directory
%Public%
install_file
$77-Update.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

behavioral22/memory/3212-1-0x0000000000620000-0x0000000000630000-memory.dmp family_xworm
C:\Users\Public\$77-Update.exe family_xworm
Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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

Processes:

Frozen Loader V2.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation Frozen Loader V2.exe

resource	yara_rule
behavioral22/memory/3212-1-0x0000000000620000-0x0000000000630000-memory.dmp	family_xworm
C:\Users\Public\$77-Update.exe	family_xworm

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Frozen Loader V2.exe

Drops startup file 2 IoCs

Processes:

Frozen Loader V2.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	Frozen Loader V2.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77-Update.lnk	Frozen Loader V2.exe

Executes dropped EXE 2 IoCs

Processes:

$77-Update.exe$77-Update.exe

pid process

1696 $77-Update.exe
4808 $77-Update.exe

pid	process
1696	$77-Update.exe
4808	$77-Update.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Frozen Loader V2.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77-Update = "C:\\Users\\Public\\$77-Update.exe"	Frozen Loader V2.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

Processes:

schtasks.exe

pid process

1352 schtasks.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Frozen Loader V2.exe$77-Update.exe$77-Update.exe

description pid process

Token: SeDebugPrivilege 3212 Frozen Loader V2.exe
Token: SeDebugPrivilege 1696 $77-Update.exe
Token: SeDebugPrivilege 4808 $77-Update.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Frozen Loader V2.exe

description pid process target process

PID 3212 wrote to memory of 1352 3212 Frozen Loader V2.exe schtasks.exe
PID 3212 wrote to memory of 1352 3212 Frozen Loader V2.exe schtasks.exe
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

pid	process
1352	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	3212	Frozen Loader V2.exe
Token: SeDebugPrivilege	1696	$77-Update.exe
Token: SeDebugPrivilege	4808	$77-Update.exe

description	pid	process	target process
PID 3212 wrote to memory of 1352	3212	Frozen Loader V2.exe	schtasks.exe
PID 3212 wrote to memory of 1352	3212	Frozen Loader V2.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\zvgfd-main\Frozen Loader V2.exe
"C:\Users\Admin\AppData\Local\Temp\zvgfd-main\Frozen Loader V2.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3212

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77-Update" /tr "C:\Users\Public\$77-Update.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:1352

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4284 --field-trial-handle=2244,i,11878111470816612087,2265290141962607370,262144 --variations-seed-version /prefetch:8
1⤵
PID:1340

C:\Users\Public\$77-Update.exe
C:\Users\Public\$77-Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1696

C:\Users\Public\$77-Update.exe
C:\Users\Public\$77-Update.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4808

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77-Update.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Public\$77-Update.exe
Filesize
35KB

MD5
fe1520b26e792424cfbf8fd7564b4a55

SHA1
da29f83984b250746f84906584481a0db9258b7c

SHA256
f2ece46035c2c59af63a43525c218247686faf36a256bb77a6103910e306c598

SHA512
10bb8a5a498ca268cf3d8f55cac252ec67ef6a608ed99a12d9eaff159a44700f09da47c0c06b9c15488c8e2dec2e9feb9fb8dd36152e9459ac5b151017d2b761

Download Submit
memory/1696-11-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/1696-13-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/3212-0-0x00007FFC22ED3000-0x00007FFC22ED5000-memory.dmp

Filesize
8KB

Download
memory/3212-1-0x0000000000620000-0x0000000000630000-memory.dmp

Filesize
64KB

Download
memory/3212-6-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download
memory/3212-7-0x00007FFC22ED3000-0x00007FFC22ED5000-memory.dmp

Filesize
8KB

Download
memory/3212-8-0x00007FFC22ED0000-0x00007FFC23991000-memory.dmp

Filesize
10.8MB

Download