stealc | e81a35c69cebdb3767e73520063997382ff2adc0eada5045aff3dab6e56c68ca

Analysis

max time kernel
142s
max time network
135s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 09:27

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General

Target

fb5a364d0cb0b8cf699a729c6846868b.exe
Size

456KB
MD5

fb5a364d0cb0b8cf699a729c6846868b
SHA1

890045ab5c2fd9826849dbefe0faac290807fe46
SHA256

e81a35c69cebdb3767e73520063997382ff2adc0eada5045aff3dab6e56c68ca
SHA512

29be708799ed0a68d9c161a631b506a5fecc75bb5ee234b911df80bd36796effcbb8f28ad7de30178930b872eb054ed107df8694cad36ad6e164ae5a70c56a85
SSDEEP

6144:Hb1m+ZBBrVw6UuNeqsGqJJ2hUOWXzt1YyQut4Mq75gQ/l67I2XDihjZdx:7c+5vdsGguOt1YyN4MyN/EQZdx

Score

10^/10

stealc zgrat discovery rat stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.62

Attributes

url_path
/902e53a07830e030.php

Signatures

Detect ZGRat V1 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1724-176-0x00000000000F0000-0x00000000039E8000-memory.dmp	family_zgrat_v1
behavioral1/memory/1724-177-0x000000001EE10000-0x000000001EF20000-memory.dmp	family_zgrat_v1
behavioral1/memory/1724-181-0x000000001E550000-0x000000001E574000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat
Downloads MZ/PE file
Executes dropped EXE 3 IoCs

Processes:

u28s.0.exerun.exeu28s.3.exe

pid process

2484 u28s.0.exe
2176 run.exe
816 u28s.3.exe

pid	process
2484	u28s.0.exe
2176	run.exe
816	u28s.3.exe

Loads dropped DLL 13 IoCs

Processes:

fb5a364d0cb0b8cf699a729c6846868b.exerun.exe

pid	process
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2176	run.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe
2908	fb5a364d0cb0b8cf699a729c6846868b.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Suspicious use of SetThreadContext 1 IoCs

Processes:

run.exe

description pid process target process

PID 2176 set thread context of 1632 2176 run.exe cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 2176 set thread context of 1632	2176	run.exe	cmd.exe

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

u28s.3.exe

description	ioc	process
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u28s.3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u28s.3.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u28s.3.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

u28s.0.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u28s.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u28s.0.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

run.execmd.exeSystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exeu28s.0.exe

pid	process
2176	run.exe
2176	run.exe
1632	cmd.exe
1632	cmd.exe
1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2484	u28s.0.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

run.exe

pid process

2176 run.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

description pid process

Token: SeDebugPrivilege 1724 SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
Suspicious use of FindShellTrayWindow 7 IoCs

Processes:

u28s.3.exe

pid process

816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
Suspicious use of SendNotifyMessage 7 IoCs

Processes:

u28s.3.exe

pid process

816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
816 u28s.3.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

run.exe

pid process

2176 run.exe
2176 run.exe

description	pid	process
Token: SeDebugPrivilege	1724	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

pid	process
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe

pid	process
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe
816	u28s.3.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

fb5a364d0cb0b8cf699a729c6846868b.exerun.exeu28s.3.exe

description	pid	process	target process
PID 2908 wrote to memory of 2484	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.0.exe
PID 2908 wrote to memory of 2484	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.0.exe
PID 2908 wrote to memory of 2484	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.0.exe
PID 2908 wrote to memory of 2484	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.0.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2908 wrote to memory of 2176	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	run.exe
PID 2176 wrote to memory of 1632	2176	run.exe	cmd.exe
PID 2176 wrote to memory of 1632	2176	run.exe	cmd.exe
PID 2176 wrote to memory of 1632	2176	run.exe	cmd.exe
PID 2176 wrote to memory of 1632	2176	run.exe	cmd.exe
PID 2908 wrote to memory of 816	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.3.exe
PID 2908 wrote to memory of 816	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.3.exe
PID 2908 wrote to memory of 816	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.3.exe
PID 2908 wrote to memory of 816	2908	fb5a364d0cb0b8cf699a729c6846868b.exe	u28s.3.exe
PID 2176 wrote to memory of 1632	2176	run.exe	cmd.exe
PID 816 wrote to memory of 1724	816	u28s.3.exe	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
PID 816 wrote to memory of 1724	816	u28s.3.exe	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
PID 816 wrote to memory of 1724	816	u28s.3.exe	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
PID 816 wrote to memory of 1724	816	u28s.3.exe	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

C:\Users\Admin\AppData\Local\Temp\fb5a364d0cb0b8cf699a729c6846868b.exe
"C:\Users\Admin\AppData\Local\Temp\fb5a364d0cb0b8cf699a729c6846868b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2908

C:\Users\Admin\AppData\Local\Temp\u28s.0.exe
"C:\Users\Admin\AppData\Local\Temp\u28s.0.exe"
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2484

C:\Users\Admin\AppData\Local\Temp\u28s.2\run.exe
"C:\Users\Admin\AppData\Local\Temp\u28s.2\run.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2176

C:\Windows\SysWOW64\cmd.exe
C:\Windows\SysWOW64\cmd.exe
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:1632

C:\Users\Admin\AppData\Local\Temp\u28s.3.exe
"C:\Users\Admin\AppData\Local\Temp\u28s.3.exe"
2⤵
- Executes dropped EXE
- Checks SCSI registry key(s)
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:816

C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
"C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1724

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Peripheral Device Discovery

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\ApplicationInsights\bd92d7984d802ff9a1e24336bd1ccb4209c69a1bd116225cd9479ac9d0f516c4\7b60561f4dd74b5e896c7730549286cf.tmp
Filesize
1KB

MD5
f312cd73a0b2f96e62cc4d6b8454bcb8

SHA1
03193eac0784d4875a4bf32ded26891ed3afd556

SHA256
bcc36dba3a66122fc067c0666878b82b0ede4b4e3e1c00430f7cf6019f20102c

SHA512
e315847d88e79025bf5220b9e90029c0f813e8d9b7175a36988fcce136c5ce6f55fa6ca589243d01fb259b2692c5975955e85843553d035dad32aa3503771163

Download Submit
C:\Users\Admin\AppData\Local\Temp\U28S1~1.ZIP
Filesize
3.7MB

MD5
78d3ca6355c93c72b494bb6a498bf639

SHA1
2fa4e5df74bfe75c207c881a1b0d3bc1c62c8b0e

SHA256
a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001

SHA512
1b2df7bee2514aee7efd3579f5dd33c76b40606d07dba69a34c45747662fad61174db4931bca02b058830107959205e889fee74f8ccc9f6e03f9fd111761f4ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\c1cde779
Filesize
1.4MB

MD5
5f2c0f9befdb7ae1ea95bb18129bf1d8

SHA1
b4ce5021bcf4fd94e39ff84209b87417b0fe433d

SHA256
04bdc330488d618008366831fba83a2c580c523e35c59daa72faa01735400166

SHA512
1b6e4b580fb88c41c76873f0d378258c301122d180fdd7ee29f5574a3efabdf6704c8b0604ce3138ccd2f7fd158df1648291ecd14fd9b5235b64aac44773da50

Download Submit
C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt
Filesize
2KB

MD5
72bea43e533dd2625d392bc240273ba6

SHA1
dc626d6d7edcba018fe45a03b3927f203ba70f8b

SHA256
94596395f4d3f2af79aa955510e86d93f2e8b531f907178e525d1d4976ce5734

SHA512
6a5ab1f6c8449d67fdae50ca024b01965cdb9fd826b08dfdbce4a39d571d9125525721c75dcb60012a0e0b0c43bb41020c2adf96f6c72e399a6e5a004dd7804d

Download Submit
C:\Users\Admin\AppData\Local\Temp\iolo\dm\ioloDMLog.txt
Filesize
3KB

MD5
104ce7581c2c738a2e9fe42b3a515c10

SHA1
e6631e510910651ee16ae4076840007771d271e6

SHA256
476f8a688dad30f01a0e3ce6b5566511762dd7876f39beca3c4d4dcddb860927

SHA512
c977ce17b2b5458ae581b0ebc5e984f47b0f7051ca7faae473c06afaad1aa1fa4c9bcfbb59cf965ebd79a75f19fb541da09818ba8d3770648bdb402e0c54a38e

Download Submit
C:\Users\Admin\AppData\Local\Temp\u28s.2\UIxMarketPlugin.dll
Filesize
1.6MB

MD5
d1ba9412e78bfc98074c5d724a1a87d6

SHA1
0572f98d78fb0b366b5a086c2a74cc68b771d368

SHA256
cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15

SHA512
8765de36d3824b12c0a4478c31b985878d4811bd0e5b6fba4ea07f8c76340bd66a2da3490d4871b95d9a12f96efc25507dfd87f431de211664dbe9a9c914af6f

Download Submit
C:\Users\Admin\AppData\Local\Temp\u28s.2\bunch.dat
Filesize
1.3MB

MD5
1e8237d3028ab52821d69099e0954f97

SHA1
30a6ae353adda0c471c6ed5b7a2458b07185abf2

SHA256
9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742

SHA512
a6406d7c18694ee014d59df581f1f76e980b68e3361ae680dc979606a423eba48d35e37f143154dd97fe5f066baf0ea51a2e9f8bc822d593e1cba70ead6559f3

Download Submit
C:\Users\Admin\AppData\Local\Temp\u28s.2\relay.dll
Filesize
1.5MB

MD5
10d51becd0bbce0fab147ff9658c565e

SHA1
4689a18112ff876d3c066bc8c14a08fd6b7b7a4a

SHA256
7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed

SHA512
29faf493bb28f7842c905adc5312f31741effb09f841059b53d73b22aea2c4d41d73db10bbf37703d6aeb936ffacbc756a3cc85ba3c0b6a6863ef4d27fefcd29

Download Submit
C:\Users\Admin\AppData\Local\Temp\u28s.2\whale.dbf
Filesize
85KB

MD5
a723bf46048e0bfb15b8d77d7a648c3e

SHA1
8952d3c34e9341e4425571e10f22b782695bb915

SHA256
b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422

SHA512
ca8ea2f7f3c7af21b5673a0a3f2611b6580a7ed02efa2cfd8b343eb644ff09682bde43b25ef7aab68530d5ce31dcbd252c382dd336ecb610d4c4ebde78347273

Download Submit
\Users\Admin\AppData\Local\Temp\u28s.0.exe
Filesize
312KB

MD5
fe1fa198626701a72893c05b5e3c7d0c

SHA1
830e5b629fec1cc2a532f6fe733efb1190c9cde5

SHA256
2a95da6136e35a81cbd596c909286255c36b42ea23288ac39bf7e5777f3c26ce

SHA512
34806c5779ceeb207df9253c5bd59b89bccb89c6ec1e09ad45d39588d5463c736169afee3ba499a6e44df47b8ee265c7be71eb274e6522ce5d4bd5a7ce976c96

Download Submit
\Users\Admin\AppData\Local\Temp\u28s.2\run.exe
Filesize
2.4MB

MD5
9fb4770ced09aae3b437c1c6eb6d7334

SHA1
fe54b31b0db8665aa5b22bed147e8295afc88a03

SHA256
a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3

SHA512
140fee6daf23fe8b7e441b3b4de83554af804f00ecedc421907a385ac79a63164bd9f28b4be061c2ea2262755d85e14d3a8e7dc910547837b664d78d93667256

Download Submit
\Users\Admin\AppData\Local\Temp\u28s.3.exe
Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/816-160-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/816-175-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/1632-159-0x0000000076E50000-0x0000000076FF9000-memory.dmp

Filesize
1.7MB

Download
memory/1724-187-0x00000000058D0000-0x0000000005932000-memory.dmp

Filesize
392KB

Download
memory/1724-185-0x000000001F840000-0x000000001F8F2000-memory.dmp

Filesize
712KB

Download
memory/1724-204-0x0000000003A90000-0x0000000003A9A000-memory.dmp

Filesize
40KB

Download
memory/1724-199-0x0000000004090000-0x000000000409C000-memory.dmp

Filesize
48KB

Download
memory/1724-196-0x000000001EA70000-0x000000001EA92000-memory.dmp

Filesize
136KB

Download
memory/1724-195-0x0000000003E80000-0x0000000003E8A000-memory.dmp

Filesize
40KB

Download
memory/1724-194-0x0000000003A90000-0x0000000003A9A000-memory.dmp

Filesize
40KB

Download
memory/1724-192-0x000000001FE90000-0x0000000020190000-memory.dmp

Filesize
3.0MB

Download
memory/1724-176-0x00000000000F0000-0x00000000039E8000-memory.dmp

Filesize
57.0MB

Download
memory/1724-177-0x000000001EE10000-0x000000001EF20000-memory.dmp

Filesize
1.1MB

Download
memory/1724-179-0x0000000003BE0000-0x0000000003BEC000-memory.dmp

Filesize
48KB

Download
memory/1724-178-0x0000000003AA0000-0x0000000003AB0000-memory.dmp

Filesize
64KB

Download
memory/1724-181-0x000000001E550000-0x000000001E574000-memory.dmp

Filesize
144KB

Download
memory/1724-180-0x0000000003BD0000-0x0000000003BE4000-memory.dmp

Filesize
80KB

Download
memory/1724-186-0x0000000004010000-0x000000000408A000-memory.dmp

Filesize
488KB

Download
memory/1724-188-0x0000000003A70000-0x0000000003A7A000-memory.dmp

Filesize
40KB

Download
memory/1724-184-0x000000001EA00000-0x000000001EA2A000-memory.dmp

Filesize
168KB

Download
memory/1724-183-0x000000001E570000-0x000000001E57A000-memory.dmp

Filesize
40KB

Download
memory/2176-109-0x0000000073A10000-0x0000000073B84000-memory.dmp

Filesize
1.5MB

Download
memory/2176-155-0x0000000073A10000-0x0000000073B84000-memory.dmp

Filesize
1.5MB

Download
memory/2176-110-0x0000000076E50000-0x0000000076FF9000-memory.dmp

Filesize
1.7MB

Download
memory/2484-158-0x0000000000400000-0x0000000001A19000-memory.dmp

Filesize
22.1MB

Download
memory/2484-203-0x0000000000400000-0x0000000001A19000-memory.dmp

Filesize
22.1MB

Download
memory/2484-217-0x0000000000400000-0x0000000001A19000-memory.dmp

Filesize
22.1MB

Download
memory/2484-225-0x0000000000400000-0x0000000001A19000-memory.dmp

Filesize
22.1MB

Download
memory/2484-239-0x0000000000400000-0x0000000001A19000-memory.dmp

Filesize
22.1MB

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memory/2908-3-0x0000000000400000-0x0000000001A3D000-memory.dmp

Filesize
22.2MB

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memory/2908-130-0x0000000000400000-0x0000000001A3D000-memory.dmp

Filesize
22.2MB

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memory/2908-1-0x0000000001B10000-0x0000000001C10000-memory.dmp

Filesize
1024KB

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memory/2908-131-0x0000000001B10000-0x0000000001C10000-memory.dmp

Filesize
1024KB

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memory/2908-2-0x0000000000380000-0x00000000003ED000-memory.dmp

Filesize
436KB

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