formbook | 46adc5850ed556d130d5d35db220fc303d45d719960e7e4b4b56174e9cdd3850

Analysis

max time kernel
300s
max time network
303s
platform
windows10_x64
resource
win10-en-20211208
submitted
09-02-2022 16:23

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General

Target

09022022-739651826-pdf.exe
Size

265KB
MD5

37c86eea298f12684500f2083a2e4e7d
SHA1

4c84e078d068e2a79ddbc48d03459e87390cb756
SHA256

46adc5850ed556d130d5d35db220fc303d45d719960e7e4b4b56174e9cdd3850
SHA512

8a9ea9cf85e375a5b4b50789c6cf1041172400916a045c735987929c52081ff25748bfa404472c580261f8251f37973ba30ecdbc464f0546f702518ff87cd09a

Score

10^/10

formbook xloader uar3 loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

uar3

Decoy

sgadvocats.com

mjscannabus.com

hilldaley.com

ksdollhouse.com

hotgiftboutique.com

purebloodsmeet.com

relaunched.info

cap-glove.com

productcollection.store

fulikyy.xyz

remoteaviationjobs.com

bestcleancrystal.com

virtualorganizationpartner.com

bookgocar.com

hattuafhv.quest

makonigroup.com

officecom-myaccount.com

malgorzata-lac.com

e-learningeducators.com

hygilaur.com

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

Xloader Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3440-118-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/3400-126-0x0000000000B70000-0x0000000000B99000-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\ZLNTRJTHWRM = "C:\\Program Files (x86)\\Maprl7\\lhihzliobpdcbc.exe"	chkdsk.exe

Executes dropped EXE 4 IoCs

Processes:

qgerjshzns.exeqgerjshzns.exelhihzliobpdcbc.exelhihzliobpdcbc.exe

pid process

1016 qgerjshzns.exe
3440 qgerjshzns.exe
4284 lhihzliobpdcbc.exe
4292 lhihzliobpdcbc.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

pid	process
1016	qgerjshzns.exe
3440	qgerjshzns.exe
4284	lhihzliobpdcbc.exe
4292	lhihzliobpdcbc.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

qgerjshzns.exeqgerjshzns.exechkdsk.exelhihzliobpdcbc.exe

description	pid	process	target process
PID 1016 set thread context of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 3440 set thread context of 3052	3440	qgerjshzns.exe	Explorer.EXE
PID 3400 set thread context of 3052	3400	chkdsk.exe	Explorer.EXE
PID 4284 set thread context of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe

Drops file in Program Files directory 4 IoCs

Processes:

chkdsk.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe	chkdsk.exe
File opened for modification	C:\Program Files (x86)\Maprl7	Explorer.EXE
File created	C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.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
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
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-1-5-21-369956170-74428499-1628131376-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

qgerjshzns.exechkdsk.exe

pid	process
3440	qgerjshzns.exe
3440	qgerjshzns.exe
3440	qgerjshzns.exe
3440	qgerjshzns.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe
3400	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3052 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

qgerjshzns.exechkdsk.exe

pid process

3440 qgerjshzns.exe
3440 qgerjshzns.exe
3440 qgerjshzns.exe
3400 chkdsk.exe
3400 chkdsk.exe
3400 chkdsk.exe
3400 chkdsk.exe

pid	process
3052	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

qgerjshzns.exechkdsk.exelhihzliobpdcbc.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3440	qgerjshzns.exe
Token: SeDebugPrivilege	3400	chkdsk.exe
Token: SeDebugPrivilege	4292	lhihzliobpdcbc.exe
Token: SeShutdownPrivilege	3052	Explorer.EXE
Token: SeCreatePagefilePrivilege	3052	Explorer.EXE

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

09022022-739651826-pdf.exeqgerjshzns.exeExplorer.EXEchkdsk.exelhihzliobpdcbc.exe

description	pid	process	target process
PID 2500 wrote to memory of 1016	2500	09022022-739651826-pdf.exe	qgerjshzns.exe
PID 2500 wrote to memory of 1016	2500	09022022-739651826-pdf.exe	qgerjshzns.exe
PID 2500 wrote to memory of 1016	2500	09022022-739651826-pdf.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 1016 wrote to memory of 3440	1016	qgerjshzns.exe	qgerjshzns.exe
PID 3052 wrote to memory of 3400	3052	Explorer.EXE	chkdsk.exe
PID 3052 wrote to memory of 3400	3052	Explorer.EXE	chkdsk.exe
PID 3052 wrote to memory of 3400	3052	Explorer.EXE	chkdsk.exe
PID 3400 wrote to memory of 3800	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 3800	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 3800	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 3228	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 3228	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 3228	3400	chkdsk.exe	cmd.exe
PID 3400 wrote to memory of 4276	3400	chkdsk.exe	Firefox.exe
PID 3400 wrote to memory of 4276	3400	chkdsk.exe	Firefox.exe
PID 3052 wrote to memory of 4284	3052	Explorer.EXE	lhihzliobpdcbc.exe
PID 3052 wrote to memory of 4284	3052	Explorer.EXE	lhihzliobpdcbc.exe
PID 3052 wrote to memory of 4284	3052	Explorer.EXE	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 4284 wrote to memory of 4292	4284	lhihzliobpdcbc.exe	lhihzliobpdcbc.exe
PID 3400 wrote to memory of 4276	3400	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3052

C:\Users\Admin\AppData\Local\Temp\09022022-739651826-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\09022022-739651826-pdf.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2500

C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1016

C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3440

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:3400

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe"
3⤵
PID:3800

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:3228

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4276

C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe
"C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4284

C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe
"C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4292

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Query Registry

T1012

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

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C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

Download Submit
C:\Program Files (x86)\Maprl7\lhihzliobpdcbc.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\akvjxtp6f43v
MD5
14823dd88a486c9049dc8e39e95e8d6c

SHA1
fe4faa49db61f5e4dce75a41bd4e3006b0f2fed8

SHA256
ee11c5923f5ec6cc1c3db829cd59d9ee4a3cc85404c68e4ab90177f010eb13c8

SHA512
e43f375eb42952580dab5f8acdd81a88e0b8c4de659b0406afd1599bbb044b71a53b353d67615fa4d2a1c7191e1e35d9e58d5ce6bdd18311e74df0f41201b560

Download Submit
C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

Download Submit
C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

Download Submit
C:\Users\Admin\AppData\Local\Temp\qgerjshzns.exe
MD5
61c6afe8eb1faafafbe8ee85d527d30e

SHA1
c3ec3a8a18ab801d7191ae3c3fc08d1dae3bdf46

SHA256
034f1d54ff9954dba589f77cf229352e339424a9f35199f23cb979c05bb889ed

SHA512
4eff030db73d65b490ab20e58034f116dc123a24b22dfb9e7d82676544085b314e52148d868f1135b8e9d80ec78c4757b4461ec1fdd42f29fcac1a5e4e5a9591

Download Submit
C:\Users\Admin\AppData\Local\Temp\uxxvuqyvja
MD5
43572ef3180d3c5c33a5cf9d62a6d696

SHA1
e079bf345f9b9133ecc1813839c4182ee6285802

SHA256
3a09220007d41f44063d266b9cf59c30e85b22e3bf33546c272046f32ea32abe

SHA512
9045ef3ea42ed91767e7b70c1e7641aaa44f2c6bd9a83f6db301a691b88e4e7e015e77fc6f578f49fad51f8e582563fa3fb68d8013c4078e3a62078b7684d7bd

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memory/3052-124-0x0000000006E40000-0x0000000006F97000-memory.dmp

Filesize
1.3MB

Download
memory/3052-129-0x00000000053B0000-0x0000000005462000-memory.dmp

Filesize
712KB

Download
memory/3400-125-0x0000000000BA0000-0x0000000000BAA000-memory.dmp

Filesize
40KB

Download
memory/3400-127-0x0000000004EC0000-0x00000000051E0000-memory.dmp

Filesize
3.1MB

Download
memory/3400-126-0x0000000000B70000-0x0000000000B99000-memory.dmp

Filesize
164KB

Download
memory/3400-128-0x0000000005270000-0x0000000005300000-memory.dmp

Filesize
576KB

Download
memory/3440-123-0x0000000000D00000-0x0000000000D11000-memory.dmp

Filesize
68KB

Download
memory/3440-122-0x000000000041D000-0x000000000041E000-memory.dmp

Filesize
4KB

Download
memory/3440-121-0x00000000009C0000-0x0000000000CE0000-memory.dmp

Filesize
3.1MB

Download
memory/3440-118-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/4292-135-0x0000000000B20000-0x0000000000E40000-memory.dmp

Filesize
3.1MB

Download