xloader | 33804adf1254ef1376ce4a0416ff03db837b5bf23a752b8483ffdc1738a5cb59

General

Target

vbc.exe
Size

510KB
MD5

ed110000e4a38ea4c524a777c0b28a38
SHA1

a82ea598a09bf51269131363d2ca1120e45c92aa
SHA256

33804adf1254ef1376ce4a0416ff03db837b5bf23a752b8483ffdc1738a5cb59
SHA512

b771cae1b0e7a25d58dbbdb60a86d39bed08d6c0f97d18b928cb1179dba6911f494b4cec853d169d3113f2a7afa1c3ac45e6fb74f6c6a1fa73978b9209c0de4e

Score

10^/10

xloader wfc6 loader rat 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 3 IoCs

rat

resource	yara_rule
behavioral2/memory/1724-140-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1724-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3888-152-0x0000000000710000-0x000000000073C000-memory.dmp	xloader

Checks computer location settings 2 TTPs 2 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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	vbc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	vbc.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1052 set thread context of 1724	1052	vbc.exe	93
PID 1724 set thread context of 3060	1724	vbc.exe	54
PID 3888 set thread context of 3060	3888	explorer.exe	54

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
4060	schtasks.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
1724	vbc.exe
1724	vbc.exe
1724	vbc.exe
1724	vbc.exe
3528	powershell.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3528	powershell.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe
3888	explorer.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1724	vbc.exe
1724	vbc.exe
1724	vbc.exe
3888	explorer.exe
3888	explorer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	vbc.exe
Token: SeDebugPrivilege	3528	powershell.exe
Token: SeDebugPrivilege	3888	explorer.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1052 wrote to memory of 3528	1052	vbc.exe	89
PID 1052 wrote to memory of 3528	1052	vbc.exe	89
PID 1052 wrote to memory of 3528	1052	vbc.exe	89
PID 1052 wrote to memory of 4060	1052	vbc.exe	91
PID 1052 wrote to memory of 4060	1052	vbc.exe	91
PID 1052 wrote to memory of 4060	1052	vbc.exe	91
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 1052 wrote to memory of 1724	1052	vbc.exe	93
PID 3060 wrote to memory of 3888	3060	Explorer.EXE	94
PID 3060 wrote to memory of 3888	3060	Explorer.EXE	94
PID 3060 wrote to memory of 3888	3060	Explorer.EXE	94

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1052
- - 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:3528
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\atfDjSnEZXbNX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp63A7.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4060
- - 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:1724
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:3888

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

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp63A7.tmp

Filesize
1KB

MD5
d3789aeb5fea0caeaa907aa73c7df749

SHA1
e57ed18dfc249e0197732071ff35308a29710295

SHA256
cbaa55edad18767b5b6ee80c979bd7885ef4c7a5094adb24e4a70b318c3544fc

SHA512
662f960b16ee25806edad0f21a999837f7a17cd4674e92a05703467d72c716fb80525ca21579d15e77af983f8ebea6cbcec85b149ac567400440ae12944c51f4

Download Submit
memory/1052-131-0x0000000005400000-0x00000000059A4000-memory.dmp

Filesize
5.6MB

Download
memory/1052-132-0x0000000004D40000-0x0000000004DD2000-memory.dmp

Filesize
584KB

Download
memory/1052-133-0x0000000004E00000-0x0000000004E0A000-memory.dmp

Filesize
40KB

Download
memory/1052-134-0x0000000000C90000-0x0000000000D2C000-memory.dmp

Filesize
624KB

Download
memory/1052-130-0x0000000000320000-0x00000000003A6000-memory.dmp

Filesize
536KB

Download
memory/1724-142-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1724-144-0x0000000001090000-0x00000000010A1000-memory.dmp

Filesize
68KB

Download
memory/1724-143-0x0000000001100000-0x000000000144A000-memory.dmp

Filesize
3.3MB

Download
memory/1724-140-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3060-158-0x0000000002E50000-0x0000000002F26000-memory.dmp

Filesize
856KB

Download
memory/3060-154-0x0000000008070000-0x0000000008205000-memory.dmp

Filesize
1.6MB

Download
memory/3060-156-0x0000000002E50000-0x0000000002F26000-memory.dmp

Filesize
856KB

Download
memory/3060-145-0x0000000008070000-0x0000000008205000-memory.dmp

Filesize
1.6MB

Download
memory/3528-161-0x0000000006310000-0x000000000632E000-memory.dmp

Filesize
120KB

Download
memory/3528-162-0x0000000007730000-0x0000000007DAA000-memory.dmp

Filesize
6.5MB

Download
memory/3528-148-0x0000000004D10000-0x0000000004D76000-memory.dmp

Filesize
408KB

Download
memory/3528-149-0x0000000004E30000-0x0000000004E96000-memory.dmp

Filesize
408KB

Download
memory/3528-166-0x0000000007310000-0x000000000731E000-memory.dmp

Filesize
56KB

Download
memory/3528-165-0x0000000007360000-0x00000000073F6000-memory.dmp

Filesize
600KB

Download
memory/3528-164-0x0000000007160000-0x000000000716A000-memory.dmp

Filesize
40KB

Download
memory/3528-163-0x00000000070E0000-0x00000000070FA000-memory.dmp

Filesize
104KB

Download
memory/3528-146-0x0000000004ED0000-0x00000000054F8000-memory.dmp

Filesize
6.2MB

Download
memory/3528-147-0x0000000004C70000-0x0000000004C92000-memory.dmp

Filesize
136KB

Download
memory/3528-138-0x0000000002460000-0x0000000002496000-memory.dmp

Filesize
216KB

Download
memory/3528-157-0x0000000005CB0000-0x0000000005CCE000-memory.dmp

Filesize
120KB

Download
memory/3528-159-0x0000000006330000-0x0000000006362000-memory.dmp

Filesize
200KB

Download
memory/3528-160-0x00000000702A0000-0x00000000702EC000-memory.dmp

Filesize
304KB

Download
memory/3888-155-0x0000000002790000-0x0000000002820000-memory.dmp

Filesize
576KB

Download
memory/3888-153-0x00000000028B0000-0x0000000002BFA000-memory.dmp

Filesize
3.3MB

Download
memory/3888-152-0x0000000000710000-0x000000000073C000-memory.dmp

Filesize
176KB

Download
memory/3888-151-0x00000000002C0000-0x00000000006F3000-memory.dmp

Filesize
4.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads