formbook | 24f26aded3fc1498cfa25636b0f53feab05bf646c8288782d7ff6d10799822b2

General

Target

PO_0018251-26931.js
Size

360KB
MD5

14d7b7944fe3f3f6d379ef011b7abcd3
SHA1

20d00db55f778ae7db48881f022b59f17ad3644e
SHA256

24f26aded3fc1498cfa25636b0f53feab05bf646c8288782d7ff6d10799822b2
SHA512

8f970656c4a6d8fc9fd9078e46d9da84a0cd888e8acb3a0a1f8efcfd5f181405da87548eda6d18c422349ac807d451b6a4e1925e6be72a98941543afb6465266

Score

10^/10

formbook vjw0rm xloader vs8g loader persistence rat spyware stealer suricata trojan worm

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

vs8g

Decoy

xEVEsySadSMf8UUC

H8ZbYtGKWPCfp91+uS3TFo/F7tYacwDqHw==

L/St5UjIhTMzEHsb

8h8tDvq0nl8JCWoagxa0MVyvnA==

7bml44z9jZsZx8Co2T8=

EwH88ZtcOu8ehs2P2o6wv78FEe4+xRQ=

bTn3LpE1HfpPAXI=

nYxT+9GLhS1d3zzGJuTDlgpT

HxonIwh8TesenMCo2T8=

Ki83MiehhC9e1i7YQ/Wd32JsGcun

wHcUByFRMuEGh8Co2T8=

86tqpg/Jy60eFmMRPefDlgpT

grSUYa5yahUf8UUC

HVviVsk7Cb6Elc571pnSWCJ93G17PkiI

6LJ1qBPUtGNIl8Co2T8=

AYuWD33xt44VxsCo2T8=

/smXvLMh868VzQqs99/DlgpT

1kEMNVtaMw6KmN+YANYm+kA=

daarti3nbFVKnsCo2T8=

0EJM6cFFHvawA2U=

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
behavioral1/memory/824-68-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/824-71-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

help.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	help.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\9R0DOPOHN = "C:\\Program Files (x86)\\Oijg4x64\\regsvc3f4.exe"	help.exe

Blocklisted process makes network request 15 IoCs

Processes:

wscript.exe

flow	pid	process
4	936	wscript.exe
5	936	wscript.exe
8	936	wscript.exe
14	936	wscript.exe
16	936	wscript.exe
20	936	wscript.exe
26	936	wscript.exe
30	936	wscript.exe
35	936	wscript.exe
38	936	wscript.exe
39	936	wscript.exe
44	936	wscript.exe
49	936	wscript.exe
53	936	wscript.exe
57	936	wscript.exe

Executes dropped EXE 1 IoCs

Processes:

bin.exe

pid process

1940 bin.exe
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:

bin.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation bin.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	bin.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RXUccpYQwK.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RXUccpYQwK.js	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\YVBPFHTJIQ = "\"C:\\Users\\Admin\\AppData\\Roaming\\RXUccpYQwK.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

bin.exehelp.exe

description	pid	process	target process
PID 1940 set thread context of 1428	1940	bin.exe	Explorer.EXE
PID 824 set thread context of 1428	824	help.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

help.exe

description ioc process

File opened for modification C:\Program Files (x86)\Oijg4x64\regsvc3f4.exe help.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\Oijg4x64\regsvc3f4.exe	help.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

help.exe

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

Suspicious behavior: EnumeratesProcesses 26 IoCs

Processes:

bin.exehelp.exe

pid	process
1940	bin.exe
1940	bin.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe
824	help.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

bin.exehelp.exe

pid process

1940 bin.exe
1940 bin.exe
1940 bin.exe
824 help.exe
824 help.exe
824 help.exe
824 help.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

bin.exehelp.exe

description pid process

Token: SeDebugPrivilege 1940 bin.exe
Token: SeDebugPrivilege 824 help.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1428 Explorer.EXE
1428 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1428 Explorer.EXE
1428 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1940	bin.exe
Token: SeDebugPrivilege	824	help.exe

pid	process
1428	Explorer.EXE
1428	Explorer.EXE

pid	process
1428	Explorer.EXE
1428	Explorer.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

wscript.exeExplorer.EXEhelp.exe

description	pid	process	target process
PID 560 wrote to memory of 936	560	wscript.exe	wscript.exe
PID 560 wrote to memory of 936	560	wscript.exe	wscript.exe
PID 560 wrote to memory of 936	560	wscript.exe	wscript.exe
PID 560 wrote to memory of 1940	560	wscript.exe	bin.exe
PID 560 wrote to memory of 1940	560	wscript.exe	bin.exe
PID 560 wrote to memory of 1940	560	wscript.exe	bin.exe
PID 560 wrote to memory of 1940	560	wscript.exe	bin.exe
PID 1428 wrote to memory of 824	1428	Explorer.EXE	help.exe
PID 1428 wrote to memory of 824	1428	Explorer.EXE	help.exe
PID 1428 wrote to memory of 824	1428	Explorer.EXE	help.exe
PID 1428 wrote to memory of 824	1428	Explorer.EXE	help.exe
PID 824 wrote to memory of 968	824	help.exe	cmd.exe
PID 824 wrote to memory of 968	824	help.exe	cmd.exe
PID 824 wrote to memory of 968	824	help.exe	cmd.exe
PID 824 wrote to memory of 968	824	help.exe	cmd.exe
PID 824 wrote to memory of 268	824	help.exe	Firefox.exe
PID 824 wrote to memory of 268	824	help.exe	Firefox.exe
PID 824 wrote to memory of 268	824	help.exe	Firefox.exe
PID 824 wrote to memory of 268	824	help.exe	Firefox.exe
PID 824 wrote to memory of 268	824	help.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1428

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO_0018251-26931.js
2⤵
- Suspicious use of WriteProcessMemory
PID:560

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RXUccpYQwK.js"
3⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:936

C:\Users\Admin\AppData\Local\Temp\bin.exe
"C:\Users\Admin\AppData\Local\Temp\bin.exe"
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1940

C:\Windows\SysWOW64\help.exe
"C:\Windows\SysWOW64\help.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:824

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\bin.exe"
3⤵
PID:968

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:268

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\bin.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

Download Submit
C:\Users\Admin\AppData\Local\Temp\bin.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

Download Submit
C:\Users\Admin\AppData\Roaming\RXUccpYQwK.js
Filesize
17KB

MD5
36ec5141b619fc59bebb52b2219a9bee

SHA1
f2418e89a5d8ce28ad3c73c0da1c8287948508a1

SHA256
beead3a67b89212d96e4c5a13bfbcd0414f3e0e849cac6b613e7b952361cea40

SHA512
253eb6c4e93870d32941532eee5b77f6887dd76b451d228674fe1c589b87943935d5a21198426d94d26e96ebe59249b0b48e32acfb81710bcd26265ca0a3a85d

Download Submit
memory/560-54-0x000007FEFB9F1000-0x000007FEFB9F3000-memory.dmp

Filesize
8KB

Download
memory/824-67-0x0000000000920000-0x0000000000C23000-memory.dmp

Filesize
3.0MB

Download
memory/824-66-0x0000000000D40000-0x0000000000D46000-memory.dmp

Filesize
24KB

Download
memory/824-73-0x0000000075271000-0x0000000075273000-memory.dmp

Filesize
8KB

Download
memory/824-71-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/824-63-0x0000000000000000-mapping.dmp

Download
memory/824-69-0x0000000000320000-0x00000000003B0000-memory.dmp

Filesize
576KB

Download
memory/824-68-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/936-55-0x0000000000000000-mapping.dmp

Download
memory/968-65-0x0000000000000000-mapping.dmp

Download
memory/1428-70-0x0000000007100000-0x000000000720D000-memory.dmp

Filesize
1.1MB

Download
memory/1428-62-0x00000000069A0000-0x0000000006B31000-memory.dmp

Filesize
1.6MB

Download
memory/1428-72-0x0000000007100000-0x000000000720D000-memory.dmp

Filesize
1.1MB

Download
memory/1940-60-0x00000000008E0000-0x0000000000BE3000-memory.dmp

Filesize
3.0MB

Download
memory/1940-57-0x0000000000000000-mapping.dmp

Download
memory/1940-61-0x0000000000180000-0x0000000000191000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads