44caliber | a669abcbdbf3f91fcfdd6cb2d55c9ba68a020c11aaca6ddf0c5bbb5c234ed023

Analysis

max time kernel
135s
max time network
149s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
26-04-2024 12:28

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General

Target

EZTEAM0.0.7.exe
Size

7.8MB
MD5

79e6e964ad3a7e5b8008dc44553b784c
SHA1

63684848b7c4530aa24c96c6223fddd7e1417702
SHA256

a669abcbdbf3f91fcfdd6cb2d55c9ba68a020c11aaca6ddf0c5bbb5c234ed023
SHA512

7e7d9aa748766b12473b178ee95c728f266e86d14110deaf9eb1937ff5343a0b7aaf0c69388eb4a918a236e19b95a87035b20792e04627ce45c630bd02c45013
SSDEEP

196608:UuUTi2pHbUmUHtahgF8/LQS9fjvSG7LUIGmrl:gwmuahk8/LbxvSG7D1Z

Score

10^/10

44caliber xworm rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

phentermine-partial.gl.at.ply.gg:36969

Attributes

Install_directory
%AppData%
install_file
Client.exe
telegram
https://api.telegram.org/bot7080511499:AAGFFOA3S2vvwmEy85SIMhKHrMsAdBoLR2Y

Extracted

Family

44caliber

https://discord.com/api/webhooks/1233119648527159317/Az86qBZQwyED_alc1sGO6UWR18PzIJCJX0PM3XdL1VTOwZPXr0B4Rc6-GqAkKUjg4Jn2

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x000d000000013309-2.dat	family_xworm
behavioral1/memory/2300-14-0x0000000000DC0000-0x0000000000DD8000-memory.dmp	family_xworm
behavioral1/memory/1268-62-0x0000000000270000-0x0000000000288000-memory.dmp	family_xworm
behavioral1/memory/624-65-0x0000000000010000-0x0000000000028000-memory.dmp	family_xworm

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

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
2300	EZTEAM.exe
2484	Chrome.exe
1268	Client.exe
624	Client.exe

Loads dropped DLL 2 IoCs

pid	Process
2036	EZTEAM0.0.7.exe
2036	EZTEAM0.0.7.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
1572	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2484	Chrome.exe
2484	Chrome.exe
2484	Chrome.exe
1784	powershell.exe
2936	powershell.exe
804	powershell.exe
2624	powershell.exe
2300	EZTEAM.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	2300	EZTEAM.exe
Token: SeDebugPrivilege	2484	Chrome.exe
Token: SeDebugPrivilege	1784	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2300	EZTEAM.exe
Token: SeDebugPrivilege	1268	Client.exe
Token: SeDebugPrivilege	624	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2300	EZTEAM.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 2300	2036	EZTEAM0.0.7.exe	28
PID 2036 wrote to memory of 2300	2036	EZTEAM0.0.7.exe	28
PID 2036 wrote to memory of 2300	2036	EZTEAM0.0.7.exe	28
PID 2036 wrote to memory of 2300	2036	EZTEAM0.0.7.exe	28
PID 2036 wrote to memory of 2484	2036	EZTEAM0.0.7.exe	29
PID 2036 wrote to memory of 2484	2036	EZTEAM0.0.7.exe	29
PID 2036 wrote to memory of 2484	2036	EZTEAM0.0.7.exe	29
PID 2036 wrote to memory of 2484	2036	EZTEAM0.0.7.exe	29
PID 2484 wrote to memory of 2436	2484	Chrome.exe	30
PID 2484 wrote to memory of 2436	2484	Chrome.exe	30
PID 2484 wrote to memory of 2436	2484	Chrome.exe	30
PID 2300 wrote to memory of 1784	2300	EZTEAM.exe	32
PID 2300 wrote to memory of 1784	2300	EZTEAM.exe	32
PID 2300 wrote to memory of 1784	2300	EZTEAM.exe	32
PID 2300 wrote to memory of 2936	2300	EZTEAM.exe	34
PID 2300 wrote to memory of 2936	2300	EZTEAM.exe	34
PID 2300 wrote to memory of 2936	2300	EZTEAM.exe	34
PID 2300 wrote to memory of 804	2300	EZTEAM.exe	36
PID 2300 wrote to memory of 804	2300	EZTEAM.exe	36
PID 2300 wrote to memory of 804	2300	EZTEAM.exe	36
PID 2300 wrote to memory of 2624	2300	EZTEAM.exe	38
PID 2300 wrote to memory of 2624	2300	EZTEAM.exe	38
PID 2300 wrote to memory of 2624	2300	EZTEAM.exe	38
PID 2300 wrote to memory of 1572	2300	EZTEAM.exe	40
PID 2300 wrote to memory of 1572	2300	EZTEAM.exe	40
PID 2300 wrote to memory of 1572	2300	EZTEAM.exe	40
PID 2844 wrote to memory of 1268	2844	taskeng.exe	43
PID 2844 wrote to memory of 1268	2844	taskeng.exe	43
PID 2844 wrote to memory of 1268	2844	taskeng.exe	43
PID 2844 wrote to memory of 624	2844	taskeng.exe	46
PID 2844 wrote to memory of 624	2844	taskeng.exe	46
PID 2844 wrote to memory of 624	2844	taskeng.exe	46

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\EZTEAM0.0.7.exe
"C:\Users\Admin\AppData\Local\Temp\EZTEAM0.0.7.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2036
- C:\Users\Admin\AppData\Local\Temp\EZTEAM.exe
  "C:\Users\Admin\AppData\Local\Temp\EZTEAM.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2300
- - 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\EZTEAM.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1784
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'EZTEAM.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2936
- - 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\Client.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:804
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2624
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Client" /tr "C:\Users\Admin\AppData\Roaming\Client.exe"
    3⤵
    - Creates scheduled task(s)
    PID:1572
- C:\Users\Admin\AppData\Local\Temp\Chrome.exe
  "C:\Users\Admin\AppData\Local\Temp\Chrome.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Windows\system32\WerFault.exe
    C:\Windows\system32\WerFault.exe -u -p 2484 -s 1124
    3⤵
    PID:2436

C:\Windows\system32\taskeng.exe
taskeng.exe {319C8B2F-2A8D-49AC-872B-24F914E105C3} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2844
- C:\Users\Admin\AppData\Roaming\Client.exe
  C:\Users\Admin\AppData\Roaming\Client.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1268
- C:\Users\Admin\AppData\Roaming\Client.exe
  C:\Users\Admin\AppData\Roaming\Client.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
cb8d178b35935750c4bf98a88a07fa1e

SHA1
bffba8d2f6118d3a9aac3e137c746dfa7687c31d

SHA256
a088b6135baa164d292d81b637ca51201d2445e7c2cee1c6f0251f45eb45ac01

SHA512
0937b5a2f894d2a435d150f5a2c337981334dd010b4ad715747163e247c067b2acdc6ed50ccb580641e65e15ae88b9da65c1dd7acab0c9625d95e4654a09747c

Download Submit
\Users\Admin\AppData\Local\Temp\Chrome.exe

Filesize
303KB

MD5
0806acefdfc7d5602fb29b696edb0c64

SHA1
ff456af5fecb477cc00fffbaa4c206d18a62ee6a

SHA256
beecfc72917651d131028b60ab9a5dfb0b8e5e4ec60248321637048e06c524b7

SHA512
aa9bf80089dd565e2a4fa0af41f42c033c8093f83e52020b6c86c4cafeb49b627d712de89625adfbbc537d60f8fa0525b3c02164f4e34900c64ca3fd4fee134e

Download Submit
\Users\Admin\AppData\Local\Temp\EZTEAM.exe

Filesize
74KB

MD5
ef36a6fed3a555b4aee8288dbe0143ee

SHA1
b31be44e9e4767d7df123d742f32802aa343d0ec

SHA256
4ab06ce2922222f591b776a0c6c332952ff24bbcf6f757692a6ed5f9b45cc67a

SHA512
04d87228b20401ab5c7d36be3a217c09a413c671a28c016fa82fe5b19cf7b5579f15bf74212bd6a5fd141bb4e29897dc754bda20896323f8f60fc55a3e47a09c

Download Submit
memory/624-65-0x0000000000010000-0x0000000000028000-memory.dmp

Filesize
96KB

Download
memory/1268-62-0x0000000000270000-0x0000000000288000-memory.dmp

Filesize
96KB

Download
memory/1784-36-0x000000001B550000-0x000000001B832000-memory.dmp

Filesize
2.9MB

Download
memory/1784-37-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2036-12-0x0000000000400000-0x0000000000BC9000-memory.dmp

Filesize
7.8MB

Download
memory/2300-14-0x0000000000DC0000-0x0000000000DD8000-memory.dmp

Filesize
96KB

Download
memory/2484-13-0x0000000001120000-0x0000000001172000-memory.dmp

Filesize
328KB

Download
memory/2936-43-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2936-44-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download