xloader | 33804adf1254ef1376ce4a0416ff03db837b5bf23a752b8483ffdc1738a5cb59

General

Target

vbc.exe
Size

510KB
MD5

ed110000e4a38ea4c524a777c0b28a38
SHA1

a82ea598a09bf51269131363d2ca1120e45c92aa
SHA256

33804adf1254ef1376ce4a0416ff03db837b5bf23a752b8483ffdc1738a5cb59
SHA512

b771cae1b0e7a25d58dbbdb60a86d39bed08d6c0f97d18b928cb1179dba6911f494b4cec853d169d3113f2a7afa1c3ac45e6fb74f6c6a1fa73978b9209c0de4e

Score

10^/10

xloader wfc6 loader rat spyware stealer suricata

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

wfc6

Decoy

FPF0BDtsP/0Z3N3EpIfSsQ==

wZbFgKkm5jUpFbB+GQ==

I/oJ0Jcb+eoMqQ==

w7zarxxnPcIgupA=

63SbUimyWalvjfJdRb9U

igCt44uCBYeAugeiTMZW

ZHJ4C8BlAvVDAIRo

XJUEKbSv5SVkKdCoWvkuKiQ=

TDPHixX7VMIgupA=

Xt5NdBkHqXeYgHtS6Lik7Sw=

rJKZiOi3mIr7iH5dEQ==

wbheFmd7+XMkt7KALN8A2NcT+npeUP+g

xqk06+lXAT3bemE847ik7Sw=

YS7SndCMWuCAFbB+GQ==

tJ4lxa1kPUfSZ4UiujZGLCQ=

j8gSmNPGzqe6

iQORUvIx0N1glkfomjmZCzmGPbKE/A==

dlD3cvHVcUBqgNrHpIfSsQ==

Sk9cCV2WvRkavg==

70RVeKQWsgOZMyf+0g0zKyM=

Signatures

Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/900-66-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/900-67-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/900-69-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/572-78-0x0000000000090000-0x00000000000BC000-memory.dmp	xloader

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-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	vbc.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
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 860 set thread context of 900	860	vbc.exe	31
PID 900 set thread context of 1200	900	vbc.exe	13
PID 572 set thread context of 1200	572	cmstp.exe	13

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

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

T1053

pid	Process
992	schtasks.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1819626980-2277161760-1023733287-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
900	vbc.exe
1152	powershell.exe
900	vbc.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
900	vbc.exe
900	vbc.exe
900	vbc.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe
572	cmstp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeDebugPrivilege	900	vbc.exe
Token: SeDebugPrivilege	572	cmstp.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1200	Explorer.EXE
1200	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1200	Explorer.EXE
1200	Explorer.EXE

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 1152	860	vbc.exe	27
PID 860 wrote to memory of 1152	860	vbc.exe	27
PID 860 wrote to memory of 1152	860	vbc.exe	27
PID 860 wrote to memory of 1152	860	vbc.exe	27
PID 860 wrote to memory of 992	860	vbc.exe	29
PID 860 wrote to memory of 992	860	vbc.exe	29
PID 860 wrote to memory of 992	860	vbc.exe	29
PID 860 wrote to memory of 992	860	vbc.exe	29
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 860 wrote to memory of 900	860	vbc.exe	31
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 1200 wrote to memory of 572	1200	Explorer.EXE	32
PID 572 wrote to memory of 632	572	cmstp.exe	34
PID 572 wrote to memory of 632	572	cmstp.exe	34
PID 572 wrote to memory of 632	572	cmstp.exe	34
PID 572 wrote to memory of 632	572	cmstp.exe	34
PID 572 wrote to memory of 632	572	cmstp.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:860
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\atfDjSnEZXbNX.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1152
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\atfDjSnEZXbNX" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCA52.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:992
- - C:\Users\Admin\AppData\Local\Temp\vbc.exe
    "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:900
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:572
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Scripting

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

Scripting

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpCA52.tmp

Filesize
1KB

MD5
44ded2e72bc93cd055932d2a67d17c81

SHA1
f932678dd94fe5f040bce0077e41bbc7133291e5

SHA256
87a3f61d032b3703adefb8a56d67360f4372d1fccea5d97cc020bab6baa366cf

SHA512
faf34bb97c5a11a71065fc2d1918d069ae51a96f4e7f23a86fcdbb51838b603c507554e0dd5f1320d989bad4c8e61c8a1b41d034f76cb87815572ea2cf99f72a

Download Submit
memory/572-80-0x0000000001CE0000-0x0000000001D70000-memory.dmp

Filesize
576KB

Download
memory/572-78-0x0000000000090000-0x00000000000BC000-memory.dmp

Filesize
176KB

Download
memory/572-79-0x0000000001E60000-0x0000000002163000-memory.dmp

Filesize
3.0MB

Download
memory/572-77-0x00000000005B0000-0x00000000005C8000-memory.dmp

Filesize
96KB

Download
memory/860-57-0x00000000054F0000-0x000000000555A000-memory.dmp

Filesize
424KB

Download
memory/860-54-0x0000000000AE0000-0x0000000000B66000-memory.dmp

Filesize
536KB

Download
memory/860-56-0x0000000000460000-0x000000000046E000-memory.dmp

Filesize
56KB

Download
memory/860-55-0x00000000763C1000-0x00000000763C3000-memory.dmp

Filesize
8KB

Download
memory/860-62-0x0000000002250000-0x0000000002282000-memory.dmp

Filesize
200KB

Download
memory/900-66-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/900-69-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/900-72-0x0000000000140000-0x0000000000151000-memory.dmp

Filesize
68KB

Download
memory/900-71-0x0000000000B70000-0x0000000000E73000-memory.dmp

Filesize
3.0MB

Download
memory/900-64-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/900-63-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1152-74-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/1152-70-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/1200-73-0x0000000007020000-0x00000000071C8000-memory.dmp

Filesize
1.7MB

Download
memory/1200-81-0x0000000004080000-0x000000000413D000-memory.dmp

Filesize
756KB

Download
memory/1200-82-0x0000000004080000-0x000000000413D000-memory.dmp

Filesize
756KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads