formbook | 3e4f71deec4d7f09a2b1d3d842f333c1a5b74b01586de7d4373c1b471268844f

General

Target

PO_200251-269312.js
Size

363KB
MD5

44caad4df8dbf71425f53a4164300228
SHA1

bcbb189276805f815d92575e026ee95c59c2a772
SHA256

3580439625a85986a0a0428e95a2c22b246c509e340082c3c03e24abc997c9d5
SHA512

309ca938b4050518afe95b9b8c44c550ecfb6cdea5bea8d8ed7c42d302808bd78efb2ea0338f9f73442dde44ca0acb5702848b97f56183cde2e38516726f769c

Score

10^/10

formbook xloader vs8g loader persistence rat spyware stealer suricata trojan

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
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 FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader payload 6 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
C:\Users\Admin\AppData\Local\Temp\bin.exe	xloader
behavioral2/memory/3184-140-0x0000000000930000-0x000000000095C000-memory.dmp	xloader
behavioral2/memory/3184-145-0x0000000000930000-0x000000000095C000-memory.dmp	xloader
C:\Program Files (x86)\Zk4nhg\gdi6le.exe	xloader
C:\Program Files (x86)\Zk4nhg\gdi6le.exe	xloader

Blocklisted process makes network request 1 IoCs

Processes:

cmstp.exe

flow pid process

73 3184 cmstp.exe
Executes dropped EXE 2 IoCs

Processes:

bin.exegdi6le.exe

pid process

1316 bin.exe
4212 gdi6le.exe

flow	pid	process
73	3184	cmstp.exe

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

Processes:

bin.exewscript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	bin.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	wscript.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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	cmstp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\_LRXTFLP4J = "C:\\Program Files (x86)\\Zk4nhg\\gdi6le.exe"	cmstp.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

bin.execmstp.exe

description	pid	process	target process
PID 1316 set thread context of 2496	1316	bin.exe	Explorer.EXE
PID 3184 set thread context of 2496	3184	cmstp.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

cmstp.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Zk4nhg\gdi6le.exe	cmstp.exe
File opened for modification	C:\Program Files (x86)\Zk4nhg	Explorer.EXE
File created	C:\Program Files (x86)\Zk4nhg\gdi6le.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Zk4nhg\gdi6le.exe	Explorer.EXE

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

bin.execmstp.exegdi6le.exe

pid	process
1316	bin.exe
1316	bin.exe
1316	bin.exe
1316	bin.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
4212	gdi6le.exe
4212	gdi6le.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe
3184	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2496 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

bin.execmstp.exe

pid process

1316 bin.exe
1316 bin.exe
1316 bin.exe
3184 cmstp.exe
3184 cmstp.exe
3184 cmstp.exe
3184 cmstp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

bin.execmstp.exegdi6le.exe

description pid process

Token: SeDebugPrivilege 1316 bin.exe
Token: SeDebugPrivilege 3184 cmstp.exe
Token: SeDebugPrivilege 4212 gdi6le.exe

pid	process
2496	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1316	bin.exe
Token: SeDebugPrivilege	3184	cmstp.exe
Token: SeDebugPrivilege	4212	gdi6le.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

wscript.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 4904 wrote to memory of 1608	4904	wscript.exe	wscript.exe
PID 4904 wrote to memory of 1608	4904	wscript.exe	wscript.exe
PID 4904 wrote to memory of 1316	4904	wscript.exe	bin.exe
PID 4904 wrote to memory of 1316	4904	wscript.exe	bin.exe
PID 4904 wrote to memory of 1316	4904	wscript.exe	bin.exe
PID 2496 wrote to memory of 3184	2496	Explorer.EXE	cmstp.exe
PID 2496 wrote to memory of 3184	2496	Explorer.EXE	cmstp.exe
PID 2496 wrote to memory of 3184	2496	Explorer.EXE	cmstp.exe
PID 3184 wrote to memory of 2096	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 2096	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 2096	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 516	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 516	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 516	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 4040	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 4040	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 4040	3184	cmstp.exe	cmd.exe
PID 3184 wrote to memory of 1732	3184	cmstp.exe	Firefox.exe
PID 3184 wrote to memory of 1732	3184	cmstp.exe	Firefox.exe
PID 3184 wrote to memory of 1732	3184	cmstp.exe	Firefox.exe
PID 2496 wrote to memory of 4212	2496	Explorer.EXE	gdi6le.exe
PID 2496 wrote to memory of 4212	2496	Explorer.EXE	gdi6le.exe
PID 2496 wrote to memory of 4212	2496	Explorer.EXE	gdi6le.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO_200251-269312.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4904

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\lohHCUyeTi.js"
2⤵
PID:1608

C:\Users\Admin\AppData\Local\Temp\bin.exe
"C:\Users\Admin\AppData\Local\Temp\bin.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1316

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2496

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Blocklisted process makes network request
- Adds 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:3184

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\bin.exe"
3⤵
PID:2096

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:516

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:4040

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1732

C:\Program Files (x86)\Zk4nhg\gdi6le.exe
"C:\Program Files (x86)\Zk4nhg\gdi6le.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4212

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

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

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Zk4nhg\gdi6le.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

Download Submit
C:\Program Files (x86)\Zk4nhg\gdi6le.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

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\Local\Temp\bin.exe
Filesize
174KB

MD5
3ae87cd93196b3f86a2e1cfa3e6c9133

SHA1
64b444869181c8893d695072239bc48681ea10cd

SHA256
0a1b761095e129d76033c7bde535ca8f0517b4ddaaeda3981b5d8f998f8cf407

SHA512
1e1490502069ff5328939cc30a8e1aa74089e9cf918a27c0ce831c877035fe578811fcb970859c88437724c65383e86f055eedad4c14e3699d4270d280b865e8

Download Submit
C:\Users\Admin\AppData\Roaming\lohHCUyeTi.js
Filesize
18KB

MD5
1077d1287ae4722779016583ec528af6

SHA1
efe686cc0d611655b03097d7e3d1c60f402d49b6

SHA256
d22b5b17c854ef3f740aff315986b82ed3859c39231defc56b02a52ce860058e

SHA512
9d69511790ab530179c82e598c892e75a58ac3407453163f9bbbd17a103b9790b7df8a44f71a523a4fea25003a9bbdb95a89d724d0d126edc619858cdf96b462

Download Submit
memory/516-147-0x0000000000000000-mapping.dmp

Download
memory/1316-136-0x0000000000520000-0x0000000000531000-memory.dmp

Filesize
68KB

Download
memory/1316-132-0x0000000000000000-mapping.dmp

Download
memory/1316-135-0x0000000000AC0000-0x0000000000E0A000-memory.dmp

Filesize
3.3MB

Download
memory/1608-130-0x0000000000000000-mapping.dmp

Download
memory/2096-141-0x0000000000000000-mapping.dmp

Download
memory/2496-146-0x0000000007D90000-0x0000000007EB3000-memory.dmp

Filesize
1.1MB

Download
memory/2496-144-0x0000000007D90000-0x0000000007EB3000-memory.dmp

Filesize
1.1MB

Download
memory/2496-137-0x0000000007C80000-0x0000000007D87000-memory.dmp

Filesize
1.0MB

Download
memory/3184-138-0x0000000000000000-mapping.dmp

Download
memory/3184-140-0x0000000000930000-0x000000000095C000-memory.dmp

Filesize
176KB

Download
memory/3184-145-0x0000000000930000-0x000000000095C000-memory.dmp

Filesize
176KB

Download
memory/3184-143-0x00000000028B0000-0x0000000002940000-memory.dmp

Filesize
576KB

Download
memory/3184-142-0x0000000002B20000-0x0000000002E6A000-memory.dmp

Filesize
3.3MB

Download
memory/3184-139-0x00000000000A0000-0x00000000000B6000-memory.dmp

Filesize
88KB

Download
memory/4040-149-0x0000000000000000-mapping.dmp

Download
memory/4212-151-0x0000000000000000-mapping.dmp

Download
memory/4212-154-0x0000000001750000-0x0000000001A9A000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads