formbook | 87cfe92ace5f79ca092a7e9b60a0cdcc4776f8583bf2ff70a8461246d6a71687

General

Target

QUOTATION.exe
Size

810KB
MD5

f516dea583b4b0f7fcb8d6dd89699f78
SHA1

a7e60518cf65022b9ce54993ba40bca09b3a024c
SHA256

2f1b95fb8123decdb56781dc245603e02ff9a1d2c2962d51fab3946712059a0a
SHA512

d079db285753c2b74f4c2520042f2857a4523c8551da6dcad0ff5e02c28348585cf7ee126b0772977faf89fd4de0bf7cd3c96fea7a5069a5ef3d810df1147b92

Score

10^/10

formbook xloader loader persistence rat spyware stealer suricata trojan

Malware Config

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

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1464-137-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral2/memory/1464-139-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral2/memory/208-145-0x0000000000610000-0x0000000000638000-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:

chkdsk.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\YXVHPFCPZDNX = "C:\\Program Files (x86)\\Bobupu\\fbc0tx4hd.exe"	chkdsk.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

Suspicious use of SetThreadContext 3 IoCs

Processes:

QUOTATION.exeQUOTATION.exechkdsk.exe

description	pid	process	target process
PID 4388 set thread context of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 1464 set thread context of 3036	1464	QUOTATION.exe	Explorer.EXE
PID 208 set thread context of 3036	208	chkdsk.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

chkdsk.exe

description ioc process

File opened for modification C:\Program Files (x86)\Bobupu\fbc0tx4hd.exe chkdsk.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Bobupu\fbc0tx4hd.exe	chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

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

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

QUOTATION.exechkdsk.exe

pid	process
1464	QUOTATION.exe
1464	QUOTATION.exe
1464	QUOTATION.exe
1464	QUOTATION.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe
208	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

QUOTATION.exechkdsk.exe

pid process

1464 QUOTATION.exe
1464 QUOTATION.exe
1464 QUOTATION.exe
208 chkdsk.exe
208 chkdsk.exe
208 chkdsk.exe
208 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

QUOTATION.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1464 QUOTATION.exe
Token: SeDebugPrivilege 208 chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1464	QUOTATION.exe
Token: SeDebugPrivilege	208	chkdsk.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

QUOTATION.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 4388 wrote to memory of 1464	4388	QUOTATION.exe	QUOTATION.exe
PID 3036 wrote to memory of 208	3036	Explorer.EXE	chkdsk.exe
PID 3036 wrote to memory of 208	3036	Explorer.EXE	chkdsk.exe
PID 3036 wrote to memory of 208	3036	Explorer.EXE	chkdsk.exe
PID 208 wrote to memory of 4172	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 4172	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 4172	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 3736	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 3736	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 3736	208	chkdsk.exe	cmd.exe
PID 208 wrote to memory of 4112	208	chkdsk.exe	Firefox.exe
PID 208 wrote to memory of 4112	208	chkdsk.exe	Firefox.exe
PID 208 wrote to memory of 4112	208	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3036

C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe
"C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4388

C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe
"C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1464

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:208

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\QUOTATION.exe"
3⤵
PID:4172

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:3736

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4112

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

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

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

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
memory/208-144-0x0000000000CD0000-0x0000000000CDA000-memory.dmp

Filesize
40KB

Download
memory/208-145-0x0000000000610000-0x0000000000638000-memory.dmp

Filesize
160KB

Download
memory/208-148-0x0000000000CE0000-0x0000000000D6F000-memory.dmp

Filesize
572KB

Download
memory/208-147-0x0000000001040000-0x000000000138A000-memory.dmp

Filesize
3.3MB

Download
memory/208-143-0x0000000000000000-mapping.dmp

Download
memory/1464-142-0x0000000001500000-0x0000000001510000-memory.dmp

Filesize
64KB

Download
memory/1464-136-0x0000000000000000-mapping.dmp

Download
memory/1464-137-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1464-139-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/1464-141-0x0000000001A80000-0x0000000001DCA000-memory.dmp

Filesize
3.3MB

Download
memory/3036-149-0x0000000002720000-0x00000000027BE000-memory.dmp

Filesize
632KB

Download
memory/3036-140-0x0000000007F20000-0x000000000809F000-memory.dmp

Filesize
1.5MB

Download
memory/3736-150-0x0000000000000000-mapping.dmp

Download
memory/4172-146-0x0000000000000000-mapping.dmp

Download
memory/4388-130-0x0000000000FE0000-0x00000000010B0000-memory.dmp

Filesize
832KB

Download
memory/4388-135-0x0000000005D40000-0x0000000005D96000-memory.dmp

Filesize
344KB

Download
memory/4388-134-0x0000000005A40000-0x0000000005A4A000-memory.dmp

Filesize
40KB

Download
memory/4388-133-0x0000000005B10000-0x0000000005BA2000-memory.dmp

Filesize
584KB

Download
memory/4388-132-0x00000000060C0000-0x0000000006664000-memory.dmp

Filesize
5.6MB

Download
memory/4388-131-0x0000000005A70000-0x0000000005B0C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads