gozi_ifsb | 54f88a13720f577d84c6e97491f588e7c79b4b6e9df490faef663de2c19cc12c

General

Target

material_06.21.doc
Size

49KB
MD5

90f830f394798beeab08062829ad1103
SHA1

14ae965eadf99d78177ca24544de9f7b1d35a744
SHA256

54f88a13720f577d84c6e97491f588e7c79b4b6e9df490faef663de2c19cc12c
SHA512

4f141b38a11ab279d981ac944ba9fb0e3614cfaabd30dccb8ae0f3859a0c904bf1c5089060311efced85becfb3b88954c33a1712aae3e2b3566432eb49cd4f76

Score

10^/10

gozi_ifsb 6000 banker trojan

Malware Config

Extracted

Family

gozi_ifsb

Botnet

6000

C2

authd.feronok.com

app.bighomegl.at

Attributes

build
250204
exe_type
loader
server_id
580

rsa_pubkey.base64

serpent.plain

Signatures

Gozi, Gozi IFSB
Gozi ISFB is a well-known and widely distributed banking trojan.
banker trojan gozi_ifsb

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

explorer.exe

description	pid	pid_target	process	target process
Parent C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE is not expected to spawn this process	1748	1668	explorer.exe	WINWORD.EXE

Blocklisted process makes network request 1 IoCs

Processes:

mshta.exe

flow pid process

5 1632 mshta.exe
Downloads MZ/PE file
Loads dropped DLL 1 IoCs

Processes:

regsvr32.exe

pid process

1752 regsvr32.exe
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Office loads VBA resources, possible macro or embedded object present

flow	pid	process
5	1632	mshta.exe

pid	process
1752	regsvr32.exe

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

Modifies Internet Explorer settings 1 TTPs 10 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXEmshta.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Main	mshta.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1668 WINWORD.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

WINWORD.EXE

pid	process
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE
1668	WINWORD.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

WINWORD.EXEexplorer.exemshta.exe

description	pid	process	target process
PID 1668 wrote to memory of 1748	1668	WINWORD.EXE	explorer.exe
PID 1668 wrote to memory of 1748	1668	WINWORD.EXE	explorer.exe
PID 1668 wrote to memory of 1748	1668	WINWORD.EXE	explorer.exe
PID 1668 wrote to memory of 1748	1668	WINWORD.EXE	explorer.exe
PID 1704 wrote to memory of 1632	1704	explorer.exe	mshta.exe
PID 1704 wrote to memory of 1632	1704	explorer.exe	mshta.exe
PID 1704 wrote to memory of 1632	1704	explorer.exe	mshta.exe
PID 1704 wrote to memory of 1632	1704	explorer.exe	mshta.exe
PID 1668 wrote to memory of 472	1668	WINWORD.EXE	splwow64.exe
PID 1668 wrote to memory of 472	1668	WINWORD.EXE	splwow64.exe
PID 1668 wrote to memory of 472	1668	WINWORD.EXE	splwow64.exe
PID 1668 wrote to memory of 472	1668	WINWORD.EXE	splwow64.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe
PID 1632 wrote to memory of 1752	1632	mshta.exe	regsvr32.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\material_06.21.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1668

\??\c:\windows\explorer.exe
c:\\windows\\explorer c:\programdata\trustPtr.hta
2⤵
- Process spawned unexpected child process
PID:1748

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:472

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Suspicious use of WriteProcessMemory
PID:1704

C:\Windows\SysWOW64\mshta.exe
"C:\Windows\SysWOW64\mshta.exe" "C:\ProgramData\trustPtr.hta"
2⤵
- Blocklisted process makes network request
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
PID:1632

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\System32\regsvr32.exe" c:\users\public\trustPtr.jpg
3⤵
- Loads dropped DLL
PID:1752

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\ProgramData\trustPtr.hta
MD5
a44ac441f49d4b76a771923067edf8ff

SHA1
342b41342ce8254b308b0ab7708f904913593c0d

SHA256
3b83b1e9090c40d855c8224479da9bbd80d3eb8184b6fc063feb66a27ff9153a

SHA512
8ab60ec33efa83f243ca980e4d882e3a95b86e3a383677c57ac1f4d329f2f1695841d3d24995291435d182b281073f332cdd2daf254349f3ab2c6a24b013d6f9

Download Submit
\??\c:\users\public\trustPtr.jpg
MD5
e07516d686514996cab6e9bf1454bd1d

SHA1
d6171de3aefb3693e052dabbea030d86a75a9619

SHA256
9c943c355fe788e2fa4b588105dc6d486640dda4b524fa237945c15daa426252

SHA512
32e7df3f3e09973850502ac30c2ac4327703b67f6461eb49089119919415da30fe8faa1f24f3be15802d2196db9272b59cd945cb13d258811117284f73f8f86b

Download Submit
\Users\Public\trustPtr.jpg
MD5
e07516d686514996cab6e9bf1454bd1d

SHA1
d6171de3aefb3693e052dabbea030d86a75a9619

SHA256
9c943c355fe788e2fa4b588105dc6d486640dda4b524fa237945c15daa426252

SHA512
32e7df3f3e09973850502ac30c2ac4327703b67f6461eb49089119919415da30fe8faa1f24f3be15802d2196db9272b59cd945cb13d258811117284f73f8f86b

Download Submit
memory/472-67-0x0000000000000000-mapping.dmp

Download
memory/1632-69-0x0000000002C70000-0x0000000002C71000-memory.dmp

Filesize
4KB

Download
memory/1632-66-0x0000000000000000-mapping.dmp

Download
memory/1668-59-0x00000000726F1000-0x00000000726F4000-memory.dmp

Filesize
12KB

Download
memory/1668-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1668-60-0x0000000070171000-0x0000000070173000-memory.dmp

Filesize
8KB

Download
memory/1668-77-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1748-63-0x000007FEFBBF1000-0x000007FEFBBF3000-memory.dmp

Filesize
8KB

Download
memory/1748-62-0x0000000000000000-mapping.dmp

Download
memory/1752-70-0x0000000000000000-mapping.dmp

Download
memory/1752-71-0x00000000753B1000-0x00000000753B3000-memory.dmp

Filesize
8KB

Download
memory/1752-74-0x000000006B170000-0x000000006B17D000-memory.dmp

Filesize
52KB

Download
memory/1752-75-0x000000006B170000-0x000000006B21F000-memory.dmp

Filesize
700KB

Download
memory/1752-76-0x0000000000340000-0x0000000000341000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads