xloader | c4cf66d4270ed0cd9203da8136221f9615b65b2e99154c349ca70edbb0b73218

General

Target

Hua Joo Success Industry.xlsx
Size

590KB
MD5

74fa450d0d5c2635b91a63fec6a6014e
SHA1

b9c4dde16c1882145f0cdf26400365f878c8608b
SHA256

c4cf66d4270ed0cd9203da8136221f9615b65b2e99154c349ca70edbb0b73218
SHA512

81779b4cb9a9d9b2deb7ca911092ce2361db9d599546ff2ffbe665f68e08c0b4347ff4265eeaba1a730fe78abe4e429dbb29734b97cc6c08560e96c10ca8130b

Score

10^/10

xloader euzn loader rat suricata

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

euzn

C2

http://www.heser.net/euzn/

Decoy

235296tyc.com

gold12guide.art

baibuaherb.com

weberwines.tax

chezvitoria.com

aidenb.tech

pitchdeckservice.com

surgeryforfdf.xyz

workunvaccinated.com

hrtaro.com

yourotcs.com

sonimultispecialityclinic.com

consultantadvisors.com

pentesting-consulting.com

dantechs.digital

longshifa.online

taweilai.net

imyusuke.com

cashndashfinancial.com

fasiglimt.quest

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
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1992-79-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral1/memory/1992-80-0x000000000041D420-mapping.dmp	xloader
behavioral1/memory/1596-88-0x00000000000C0000-0x00000000000E9000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 304 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

1620 vbc.exe
1992 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

304 EQNEDT32.EXE
304 EQNEDT32.EXE
304 EQNEDT32.EXE
304 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	304	EQNEDT32.EXE

pid	process
1620	vbc.exe
1992	vbc.exe

pid	process
304	EQNEDT32.EXE
304	EQNEDT32.EXE
304	EQNEDT32.EXE
304	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exesvchost.exe

description	pid	process	target process
PID 1620 set thread context of 1992	1620	vbc.exe	vbc.exe
PID 1992 set thread context of 1208	1992	vbc.exe	Explorer.EXE
PID 1596 set thread context of 1208	1596	svchost.exe	Explorer.EXE

Drops file in Windows directory 1 IoCs

Processes:

Explorer.EXE

description ioc process

File opened for modification \??\c:\windows\installer\{ac76ba86-7ad7-1033-7b44-a90000000001}\sc_reader.exe Explorer.EXE
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

304 EQNEDT32.EXE

description	ioc	process
File opened for modification	\??\c:\windows\installer\{ac76ba86-7ad7-1033-7b44-a90000000001}\sc_reader.exe	Explorer.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
304	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Modifies registry class 9 IoCs

Processes:

vbc.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\DefaultIcon	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\.gmkasm\ = "GMKAssembler.Project"	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\Shell\open\command	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\Shell\open\command\ = "\"C:\\Users\\Public\\vbc.exe\" \"%1\""	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\DefaultIcon\ = "C:\\Users\\Public\\vbc.exe"	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\.gmkasm	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\Shell	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000_CLASSES\GMKAssembler.Project\Shell\open	vbc.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

816 EXCEL.EXE

pid	process
816	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

vbc.exesvchost.exe

pid	process
1992	vbc.exe
1992	vbc.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe
1596	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exesvchost.exe

pid process

1992 vbc.exe
1992 vbc.exe
1992 vbc.exe
1596 svchost.exe
1596 svchost.exe

pid	process
1208	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

vbc.exesvchost.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1992	vbc.exe
Token: SeDebugPrivilege	1596	svchost.exe
Token: SeShutdownPrivilege	1208	Explorer.EXE
Token: SeShutdownPrivilege	1208	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
1208 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

816 EXCEL.EXE
816 EXCEL.EXE
816 EXCEL.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE
1208	Explorer.EXE

pid	process
816	EXCEL.EXE
816	EXCEL.EXE
816	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXEsvchost.exe

description	pid	process	target process
PID 304 wrote to memory of 1620	304	EQNEDT32.EXE	vbc.exe
PID 304 wrote to memory of 1620	304	EQNEDT32.EXE	vbc.exe
PID 304 wrote to memory of 1620	304	EQNEDT32.EXE	vbc.exe
PID 304 wrote to memory of 1620	304	EQNEDT32.EXE	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1620 wrote to memory of 1992	1620	vbc.exe	vbc.exe
PID 1208 wrote to memory of 1596	1208	Explorer.EXE	svchost.exe
PID 1208 wrote to memory of 1596	1208	Explorer.EXE	svchost.exe
PID 1208 wrote to memory of 1596	1208	Explorer.EXE	svchost.exe
PID 1208 wrote to memory of 1596	1208	Explorer.EXE	svchost.exe
PID 1596 wrote to memory of 1520	1596	svchost.exe	cmd.exe
PID 1596 wrote to memory of 1520	1596	svchost.exe	cmd.exe
PID 1596 wrote to memory of 1520	1596	svchost.exe	cmd.exe
PID 1596 wrote to memory of 1520	1596	svchost.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Windows directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1208

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Hua Joo Success Industry.xlsx"
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:816

C:\Windows\SysWOW64\svchost.exe
"C:\Windows\SysWOW64\svchost.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1596

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1520

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:304

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1620

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1992

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
C:\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
C:\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
\Users\Public\vbc.exe
MD5
6e1476a40e4f1b65294f5ff5df9f99d7

SHA1
da3f2a6fb40d243ece92534253c79c2669bd4e69

SHA256
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

SHA512
0bfabd3b94785ddc530ba7b76258382f1212587c50f89da273294e6c698792c4d9296bd323d3814ae559cda1fd3ce3339d9a8e0f168e5e714fc9f804b0ddfc0f

Download Submit
memory/304-62-0x0000000075511000-0x0000000075513000-memory.dmp

Filesize
8KB

Download
memory/816-75-0x0000000005F20000-0x0000000006B6A000-memory.dmp

Filesize
12.3MB

Download
memory/816-92-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/816-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/816-59-0x000000002FBE1000-0x000000002FBE4000-memory.dmp

Filesize
12KB

Download
memory/816-60-0x0000000070FB1000-0x0000000070FB3000-memory.dmp

Filesize
8KB

Download
memory/816-76-0x0000000005F20000-0x0000000006B6A000-memory.dmp

Filesize
12.3MB

Download
memory/816-74-0x0000000005F20000-0x0000000006B6A000-memory.dmp

Filesize
12.3MB

Download
memory/1208-84-0x00000000061D0000-0x0000000006490000-memory.dmp

Filesize
2.8MB

Download
memory/1208-91-0x00000000061D0000-0x0000000006490000-memory.dmp

Filesize
2.8MB

Download
memory/1520-86-0x0000000000000000-mapping.dmp

Download
memory/1596-85-0x0000000000000000-mapping.dmp

Download
memory/1596-90-0x00000000004B0000-0x0000000000540000-memory.dmp

Filesize
576KB

Download
memory/1596-89-0x0000000000850000-0x0000000000B53000-memory.dmp

Filesize
3.0MB

Download
memory/1596-87-0x0000000000FA0000-0x0000000000FA8000-memory.dmp

Filesize
32KB

Download
memory/1596-88-0x00000000000C0000-0x00000000000E9000-memory.dmp

Filesize
164KB

Download
memory/1620-70-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

Filesize
4KB

Download
memory/1620-73-0x0000000000860000-0x000000000087D000-memory.dmp

Filesize
116KB

Download
memory/1620-72-0x00000000049A0000-0x00000000049A1000-memory.dmp

Filesize
4KB

Download
memory/1620-78-0x0000000000AD0000-0x0000000000B07000-memory.dmp

Filesize
220KB

Download
memory/1620-77-0x0000000004DF0000-0x0000000004E57000-memory.dmp

Filesize
412KB

Download
memory/1620-67-0x0000000000000000-mapping.dmp

Download
memory/1992-83-0x0000000000280000-0x0000000000291000-memory.dmp

Filesize
68KB

Download
memory/1992-82-0x0000000000850000-0x0000000000B53000-memory.dmp

Filesize
3.0MB

Download
memory/1992-80-0x000000000041D420-mapping.dmp

Download
memory/1992-79-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads