formbook | f8d9fbcef6907460baa7c91e53d1a40865901bb50906b5519cba440fdbc65032

General

Target

triage_dropped_file.exe
Size

253KB
MD5

d0e4c13e6c8ba9fe34d86b554b595d9a
SHA1

83eee2dbe00ae265af9eb13105dc1068b6b034cd
SHA256

f8d9fbcef6907460baa7c91e53d1a40865901bb50906b5519cba440fdbc65032
SHA512

72f5fcd367c0f0fdc83827bea529f84a85ace28550a5cd8102cb0cde2829d81defe312fb0d95d3c5a8e8728f4efd8cb433bfab0b3e1f265fffdc4e0ad687247d

Score

10^/10

formbook xloader kqna loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

kqna

C2

http://www.surfsolutions.info/kqna/

Decoy

achyutlifesciences.com

anthemmg.com

netkopat.com

generationgirlnaturals.com

novatel-network.com

craftstockco.com

thevishantiverse.art

elkerfly.com

haerotechs.com

candypalette.com

gregdokes.com

e-commerce.company

gratitudeland.com

companyintelcloud.com

publicyazilim.com

xc6811.com

aracsozluk.com

janesgalant.quest

fraserstephendop.com

ryan.rentals

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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral3/memory/364-57-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral3/memory/364-58-0x000000000041D400-mapping.dmp	xloader
behavioral3/memory/1072-66-0x0000000000080000-0x00000000000A9000-memory.dmp	xloader
behavioral3/memory/276-78-0x000000000041D400-mapping.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	colorcpl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\BX4DUX18FPGL = "C:\\Program Files (x86)\\Rsbu\\mfcn0ex.exe"	colorcpl.exe

Executes dropped EXE 2 IoCs

Processes:

mfcn0ex.exemfcn0ex.exe

pid process

1596 mfcn0ex.exe
276 mfcn0ex.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1428 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

triage_dropped_file.exemfcn0ex.exe

pid process

656 triage_dropped_file.exe
1596 mfcn0ex.exe

pid	process
1596	mfcn0ex.exe
276	mfcn0ex.exe

pid	process
1428	cmd.exe

pid	process
656	triage_dropped_file.exe
1596	mfcn0ex.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

triage_dropped_file.exetriage_dropped_file.execolorcpl.exemfcn0ex.exe

description	pid	process	target process
PID 656 set thread context of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 364 set thread context of 1268	364	triage_dropped_file.exe	Explorer.EXE
PID 1072 set thread context of 1268	1072	colorcpl.exe	Explorer.EXE
PID 1596 set thread context of 276	1596	mfcn0ex.exe	mfcn0ex.exe

Drops file in Program Files directory 2 IoCs

Processes:

colorcpl.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Rsbu\mfcn0ex.exe	colorcpl.exe
File created	C:\Program Files (x86)\Rsbu\mfcn0ex.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

NSIS installer 6 IoCs

installer

Processes:

resource	yara_rule
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_1
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_2
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_1
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_2
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_1
C:\Program Files (x86)\Rsbu\mfcn0ex.exe	nsis_installer_2

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

colorcpl.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2955169046-2371869340-1800780948-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	colorcpl.exe

Suspicious behavior: EnumeratesProcesses 59 IoCs

Processes:

triage_dropped_file.execolorcpl.exemfcn0ex.exe

pid	process
364	triage_dropped_file.exe
364	triage_dropped_file.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
276	mfcn0ex.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1268 Explorer.EXE

pid	process
1268	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

triage_dropped_file.execolorcpl.exe

pid	process
364	triage_dropped_file.exe
364	triage_dropped_file.exe
364	triage_dropped_file.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe
1072	colorcpl.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

triage_dropped_file.execolorcpl.exemfcn0ex.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	364	triage_dropped_file.exe
Token: SeDebugPrivilege	1072	colorcpl.exe
Token: SeDebugPrivilege	276	mfcn0ex.exe
Token: SeShutdownPrivilege	1268	Explorer.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1268 Explorer.EXE
1268 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1268 Explorer.EXE
1268 Explorer.EXE

pid	process
1268	Explorer.EXE
1268	Explorer.EXE

pid	process
1268	Explorer.EXE
1268	Explorer.EXE

Suspicious use of WriteProcessMemory 31 IoCs

Processes:

triage_dropped_file.exeExplorer.EXEcolorcpl.exemfcn0ex.exe

description	pid	process	target process
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 656 wrote to memory of 364	656	triage_dropped_file.exe	triage_dropped_file.exe
PID 1268 wrote to memory of 1072	1268	Explorer.EXE	colorcpl.exe
PID 1268 wrote to memory of 1072	1268	Explorer.EXE	colorcpl.exe
PID 1268 wrote to memory of 1072	1268	Explorer.EXE	colorcpl.exe
PID 1268 wrote to memory of 1072	1268	Explorer.EXE	colorcpl.exe
PID 1072 wrote to memory of 1428	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1428	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1428	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1428	1072	colorcpl.exe	cmd.exe
PID 1072 wrote to memory of 1664	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 1664	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 1664	1072	colorcpl.exe	Firefox.exe
PID 1072 wrote to memory of 1664	1072	colorcpl.exe	Firefox.exe
PID 1268 wrote to memory of 1596	1268	Explorer.EXE	mfcn0ex.exe
PID 1268 wrote to memory of 1596	1268	Explorer.EXE	mfcn0ex.exe
PID 1268 wrote to memory of 1596	1268	Explorer.EXE	mfcn0ex.exe
PID 1268 wrote to memory of 1596	1268	Explorer.EXE	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1596 wrote to memory of 276	1596	mfcn0ex.exe	mfcn0ex.exe
PID 1072 wrote to memory of 1664	1072	colorcpl.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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1268

C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe
"C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:656

C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe
"C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:364

C:\Windows\SysWOW64\colorcpl.exe
"C:\Windows\SysWOW64\colorcpl.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:1072

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
3⤵
- Deletes itself
PID:1428

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1664

C:\Program Files (x86)\Rsbu\mfcn0ex.exe
"C:\Program Files (x86)\Rsbu\mfcn0ex.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1596

C:\Program Files (x86)\Rsbu\mfcn0ex.exe
"C:\Program Files (x86)\Rsbu\mfcn0ex.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:276

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

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Rsbu\mfcn0ex.exe
MD5
d0e4c13e6c8ba9fe34d86b554b595d9a

SHA1
83eee2dbe00ae265af9eb13105dc1068b6b034cd

SHA256
f8d9fbcef6907460baa7c91e53d1a40865901bb50906b5519cba440fdbc65032

SHA512
72f5fcd367c0f0fdc83827bea529f84a85ace28550a5cd8102cb0cde2829d81defe312fb0d95d3c5a8e8728f4efd8cb433bfab0b3e1f265fffdc4e0ad687247d

Download Submit
C:\Program Files (x86)\Rsbu\mfcn0ex.exe
MD5
d0e4c13e6c8ba9fe34d86b554b595d9a

SHA1
83eee2dbe00ae265af9eb13105dc1068b6b034cd

SHA256
f8d9fbcef6907460baa7c91e53d1a40865901bb50906b5519cba440fdbc65032

SHA512
72f5fcd367c0f0fdc83827bea529f84a85ace28550a5cd8102cb0cde2829d81defe312fb0d95d3c5a8e8728f4efd8cb433bfab0b3e1f265fffdc4e0ad687247d

Download Submit
C:\Program Files (x86)\Rsbu\mfcn0ex.exe
MD5
d0e4c13e6c8ba9fe34d86b554b595d9a

SHA1
83eee2dbe00ae265af9eb13105dc1068b6b034cd

SHA256
f8d9fbcef6907460baa7c91e53d1a40865901bb50906b5519cba440fdbc65032

SHA512
72f5fcd367c0f0fdc83827bea529f84a85ace28550a5cd8102cb0cde2829d81defe312fb0d95d3c5a8e8728f4efd8cb433bfab0b3e1f265fffdc4e0ad687247d

Download Submit
C:\Users\Admin\AppData\Local\Temp\v9o87lv0ox9o
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\Users\Admin\AppData\Local\Temp\nsdCFCE.tmp\oirygpbyia.dll
MD5
6d2a0ca8aac6594e4f037d3cecdace3b

SHA1
2fdc815752d2483ae536ed60dd2104b0e5cc2abd

SHA256
f7a3aa43e037f6b25c8070b3aaac9f0c5037abb1c4d01afd30a6f52f7c44f468

SHA512
cacc25100aedd926141416ef443dd40f03cb6b1512129bd707fc8ece1c9db2ad9a1de559e8cb3d29b569e2b1b843822f4ef681c4ea33bc5a6a290a3f17bdb7ee

Download Submit
\Users\Admin\AppData\Local\Temp\nsk16BD.tmp\oirygpbyia.dll
MD5
6d2a0ca8aac6594e4f037d3cecdace3b

SHA1
2fdc815752d2483ae536ed60dd2104b0e5cc2abd

SHA256
f7a3aa43e037f6b25c8070b3aaac9f0c5037abb1c4d01afd30a6f52f7c44f468

SHA512
cacc25100aedd926141416ef443dd40f03cb6b1512129bd707fc8ece1c9db2ad9a1de559e8cb3d29b569e2b1b843822f4ef681c4ea33bc5a6a290a3f17bdb7ee

Download Submit
memory/276-80-0x0000000000930000-0x0000000000C33000-memory.dmp

Filesize
3.0MB

Download
memory/276-78-0x000000000041D400-mapping.dmp

Download
memory/364-61-0x0000000000340000-0x0000000000351000-memory.dmp

Filesize
68KB

Download
memory/364-57-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/364-58-0x000000000041D400-mapping.dmp

Download
memory/364-60-0x0000000000890000-0x0000000000B93000-memory.dmp

Filesize
3.0MB

Download
memory/656-55-0x00000000755D1000-0x00000000755D3000-memory.dmp

Filesize
8KB

Download
memory/1072-69-0x0000000000960000-0x00000000009F0000-memory.dmp

Filesize
576KB

Download
memory/1072-65-0x0000000000B50000-0x0000000000B68000-memory.dmp

Filesize
96KB

Download
memory/1072-63-0x0000000000000000-mapping.dmp

Download
memory/1072-66-0x0000000000080000-0x00000000000A9000-memory.dmp

Filesize
164KB

Download
memory/1072-68-0x0000000002100000-0x0000000002403000-memory.dmp

Filesize
3.0MB

Download
memory/1268-62-0x0000000006E50000-0x0000000006F8A000-memory.dmp

Filesize
1.2MB

Download
memory/1268-70-0x0000000006B20000-0x0000000006C29000-memory.dmp

Filesize
1.0MB

Download
memory/1428-67-0x0000000000000000-mapping.dmp

Download
memory/1596-71-0x0000000000000000-mapping.dmp

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads