stealc | c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b

Analysis

max time kernel
129s
max time network
130s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
17-04-2024 05:10

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General

Target

c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe
Size

447KB
MD5

54abcad0c5feb7390352b815948dde0e
SHA1

ff49d09d0bf2b8c74357087d075e9eda63aeadaf
SHA256

c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b
SHA512

0b99f7cab57c93c9bd139a9bed046bff876ba456eaf570d7d0d477827bc1f6a6b2c08110d7f247402783fcdedbf250416cc5c6f41d33ac30ecc25a2848a6a3d9
SSDEEP

12288:zy5vni5zYCLqSfKbxhWqeXJziUQHJwPWE4:zzX9fCWdzhOG94

Score

10^/10

stealc zgrat rat stealer

Malware Config

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/2192-67-0x000001F1A8F00000-0x000001F1AC7F8000-memory.dmp	family_zgrat_v1
behavioral2/memory/2192-69-0x000001F1C7040000-0x000001F1C7150000-memory.dmp	family_zgrat_v1
behavioral2/memory/2192-73-0x000001F1AE770000-0x000001F1AE794000-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 2 IoCs

pid	Process
3640	u3ak.0.exe
4180	u3ak.1.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4488	3640	WerFault.exe	83
2460	4268	WerFault.exe	80

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

description	ioc	Process
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ak.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ak.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u3ak.1.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2192	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe
4180	u3ak.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4268 wrote to memory of 3640	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	83
PID 4268 wrote to memory of 3640	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	83
PID 4268 wrote to memory of 3640	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	83
PID 4268 wrote to memory of 4180	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	89
PID 4268 wrote to memory of 4180	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	89
PID 4268 wrote to memory of 4180	4268	c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe	89
PID 4180 wrote to memory of 2192	4180	u3ak.1.exe	94
PID 4180 wrote to memory of 2192	4180	u3ak.1.exe	94

C:\Users\Admin\AppData\Local\Temp\c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe
"C:\Users\Admin\AppData\Local\Temp\c1fc3cc411715c3516ba91e948b53416e9567836091646af96c37a35c07c985b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4268
- C:\Users\Admin\AppData\Local\Temp\u3ak.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ak.0.exe"
  2⤵
  - Executes dropped EXE
  PID:3640
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3640 -s 1244
    3⤵
    - Program crash
    PID:4488
- C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4180
- - 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:2192
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4268 -s 696
  2⤵
  - Program crash
  PID:2460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3640 -ip 3640
1⤵
PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4268 -ip 4268
1⤵
PID:4412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\u3ak.0.exe

Filesize
305KB

MD5
73ba48ab32bb66dc094e71ce92b708d5

SHA1
d09852fc65eb633d34c2181ebe79f29bb023bb34

SHA256
c4069d693c5cfad7420c05b96039254630aa584112aa07d4be366224083ba015

SHA512
7ecb1a6d1205dbea87fbb1fc56e5653403edcb6d3a12aecd5ef1ba43ff83897017ca533bb69bae9243ec346fbbc1dc009d061b53258dc8173074882daa46ca9c

Download Submit
C:\Users\Admin\AppData\Local\Temp\u3ak.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/2192-89-0x000001F1CB850000-0x000001F1CB888000-memory.dmp

Filesize
224KB

Download
memory/2192-104-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-105-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-76-0x000001F1C6FC0000-0x000001F1C6FEA000-memory.dmp

Filesize
168KB

Download
memory/2192-77-0x000001F1C7350000-0x000001F1C73CA000-memory.dmp

Filesize
488KB

Download
memory/2192-103-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-102-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-101-0x00007FFCF60D0000-0x00007FFCF6B92000-memory.dmp

Filesize
10.8MB

Download
memory/2192-99-0x000001F1CC290000-0x000001F1CC2AE000-memory.dmp

Filesize
120KB

Download
memory/2192-98-0x000001F1CC260000-0x000001F1CC282000-memory.dmp

Filesize
136KB

Download
memory/2192-97-0x000001F1CBF40000-0x000001F1CBF4C000-memory.dmp

Filesize
48KB

Download
memory/2192-96-0x000001F1CBF90000-0x000001F1CBFE0000-memory.dmp

Filesize
320KB

Download
memory/2192-66-0x00007FFCF60D0000-0x00007FFCF6B92000-memory.dmp

Filesize
10.8MB

Download
memory/2192-67-0x000001F1A8F00000-0x000001F1AC7F8000-memory.dmp

Filesize
57.0MB

Download
memory/2192-68-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-69-0x000001F1C7040000-0x000001F1C7150000-memory.dmp

Filesize
1.1MB

Download
memory/2192-70-0x000001F1AE6E0000-0x000001F1AE6F0000-memory.dmp

Filesize
64KB

Download
memory/2192-78-0x000001F1C73D0000-0x000001F1C7432000-memory.dmp

Filesize
392KB

Download
memory/2192-72-0x000001F1AE6F0000-0x000001F1AE704000-memory.dmp

Filesize
80KB

Download
memory/2192-73-0x000001F1AE770000-0x000001F1AE794000-memory.dmp

Filesize
144KB

Download
memory/2192-74-0x000001F1AE7A0000-0x000001F1AE7AA000-memory.dmp

Filesize
40KB

Download
memory/2192-75-0x000001F1C72A0000-0x000001F1C7352000-memory.dmp

Filesize
712KB

Download
memory/2192-93-0x000001F1CC480000-0x000001F1CC9A8000-memory.dmp

Filesize
5.2MB

Download
memory/2192-92-0x000001F1CBF20000-0x000001F1CBF42000-memory.dmp

Filesize
136KB

Download
memory/2192-71-0x000001F1AE710000-0x000001F1AE71C000-memory.dmp

Filesize
48KB

Download
memory/2192-79-0x000001F1C74B0000-0x000001F1C7526000-memory.dmp

Filesize
472KB

Download
memory/2192-80-0x000001F1AE6C0000-0x000001F1AE6CA000-memory.dmp

Filesize
40KB

Download
memory/2192-84-0x000001F1C7530000-0x000001F1C7830000-memory.dmp

Filesize
3.0MB

Download
memory/2192-86-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-87-0x000001F1C7490000-0x000001F1C7498000-memory.dmp

Filesize
32KB

Download
memory/2192-88-0x000001F1C7030000-0x000001F1C7040000-memory.dmp

Filesize
64KB

Download
memory/2192-91-0x000001F1CB8C0000-0x000001F1CB8CA000-memory.dmp

Filesize
40KB

Download
memory/2192-90-0x000001F1CB810000-0x000001F1CB81E000-memory.dmp

Filesize
56KB

Download
memory/3640-14-0x0000000003090000-0x00000000030B7000-memory.dmp

Filesize
156KB

Download
memory/3640-30-0x0000000000400000-0x0000000002D2A000-memory.dmp

Filesize
41.2MB

Download
memory/3640-15-0x0000000000400000-0x0000000002D2A000-memory.dmp

Filesize
41.2MB

Download
memory/3640-13-0x00000000030C0000-0x00000000031C0000-memory.dmp

Filesize
1024KB

Download
memory/4180-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4180-53-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4180-26-0x0000000000B20000-0x0000000000B21000-memory.dmp

Filesize
4KB

Download
memory/4268-1-0x0000000002E00000-0x0000000002F00000-memory.dmp

Filesize
1024KB

Download
memory/4268-3-0x0000000000400000-0x0000000002D4D000-memory.dmp

Filesize
41.3MB

Download
memory/4268-33-0x0000000004BA0000-0x0000000004C0C000-memory.dmp

Filesize
432KB

Download
memory/4268-32-0x0000000000400000-0x0000000002D4D000-memory.dmp

Filesize
41.3MB

Download
memory/4268-2-0x0000000004BA0000-0x0000000004C0C000-memory.dmp

Filesize
432KB

Download