stealc | b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd

General

Target

b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
Size

365KB
MD5

b1dec1297755fa5d0dd45742506cc365
SHA1

8129aab6ae529b053cf2e7ef82cf25108789b0bb
SHA256

b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd
SHA512

04bb173e13e0848433a1b638188d0c6981f570b00534836c09833528d7bf44f61d813b3132d0288f8c594402b65b0172fc8078d7eed1d39384ed35d8d9386987
SSDEEP

6144:0j9PNW6k+7KXF5gUZwnAFpPLr2PXEVT1NjGzG4YqJcbbYTOO1:0j9PA6d7K4UZwQ2Xw1mt+b8OO1

Score

10^/10

stealc zgrat discovery rat stealer

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral1/memory/1868-74-0x0000000000010000-0x0000000003844000-memory.dmp	family_zgrat_v1
behavioral1/memory/1868-79-0x000000001E590000-0x000000001E5B4000-memory.dmp	family_zgrat_v1
behavioral1/memory/1868-75-0x000000001ECE0000-0x000000001EDEA000-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
3020	u2b4.0.exe
2696	u2b4.1.exe

Loads dropped DLL 8 IoCs

pid	Process
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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 opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2b4.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2b4.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u2b4.1.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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u2b4.0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u2b4.0.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
3020	u2b4.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe
2696	u2b4.1.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 3020	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	28
PID 2992 wrote to memory of 3020	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	28
PID 2992 wrote to memory of 3020	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	28
PID 2992 wrote to memory of 3020	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	28
PID 2992 wrote to memory of 2696	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	29
PID 2992 wrote to memory of 2696	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	29
PID 2992 wrote to memory of 2696	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	29
PID 2992 wrote to memory of 2696	2992	b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe	29
PID 2696 wrote to memory of 1868	2696	u2b4.1.exe	31
PID 2696 wrote to memory of 1868	2696	u2b4.1.exe	31
PID 2696 wrote to memory of 1868	2696	u2b4.1.exe	31
PID 2696 wrote to memory of 1868	2696	u2b4.1.exe	31

C:\Users\Admin\AppData\Local\Temp\b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe
"C:\Users\Admin\AppData\Local\Temp\b21236873589e7a87443638329edc4d16f6f56a48ddebbba3d5ccd0e9401ecbd.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Users\Admin\AppData\Local\Temp\u2b4.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u2b4.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3020
- C:\Users\Admin\AppData\Local\Temp\u2b4.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u2b4.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2696
- - 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:1868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\ApplicationInsights\f40fa09571ae3e4604ca1ef5093c12d04345052412cd199086553bfab6d3b7c7\8825afa35f914367b5f44c3c348297fe.tmp

Filesize
1KB

MD5
ffd3cdf1d4601ede2d83fbac5febeaa7

SHA1
3c7de8bb1519cc735e1bf49fb7bbc8553189298f

SHA256
611762d8ae073fc6e04fd6afb701291e4f6a5c2f7c2ccfd55fe1fe0b238d32d7

SHA512
b15ee443b254e963a2077ac4bc30cbf0f61a0062caabd2858bec6920f4d46b459fcea63c97a0f170dfda662e70597a4ac1e76550b320d674e77e640be21f3bcc

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2b4.0.exe

Filesize
223KB

MD5
ac3b1a30e96b6d89ce98a21bb5b2093a

SHA1
4270104678195b8cad3520a704c556155a0a65b5

SHA256
803946c2712aec2b60b54b3cd7c3375a9a0158e7ccbfbd4ab8a66e6ddfc7d463

SHA512
65e74527ffa9d6e776d063db44322080315a5a9eb13bb67acd61be6e65862ec127366d742beca349c7ca8281e2f67193bafc14c8c0ee3f222b19b452d05c8491

Download Submit
C:\Users\Admin\AppData\Local\Temp\u2b4.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1868-92-0x000000001F5B0000-0x000000001F612000-memory.dmp

Filesize
392KB

Download
memory/1868-91-0x0000000005950000-0x000000000595A000-memory.dmp

Filesize
40KB

Download
memory/1868-81-0x000000001E910000-0x000000001E91A000-memory.dmp

Filesize
40KB

Download
memory/1868-79-0x000000001E590000-0x000000001E5B4000-memory.dmp

Filesize
144KB

Download
memory/1868-101-0x0000000005750000-0x000000000575A000-memory.dmp

Filesize
40KB

Download
memory/1868-102-0x0000000005750000-0x000000000575A000-memory.dmp

Filesize
40KB

Download
memory/1868-96-0x0000000005A50000-0x0000000005A5C000-memory.dmp

Filesize
48KB

Download
memory/1868-75-0x000000001ECE0000-0x000000001EDEA000-memory.dmp

Filesize
1.0MB

Download
memory/1868-74-0x0000000000010000-0x0000000003844000-memory.dmp

Filesize
56.2MB

Download
memory/1868-77-0x0000000005960000-0x000000000596C000-memory.dmp

Filesize
48KB

Download
memory/1868-78-0x0000000005790000-0x00000000057A4000-memory.dmp

Filesize
80KB

Download
memory/1868-76-0x0000000005780000-0x0000000005790000-memory.dmp

Filesize
64KB

Download
memory/1868-82-0x000000001EC50000-0x000000001EC7A000-memory.dmp

Filesize
168KB

Download
memory/1868-83-0x000000001F500000-0x000000001F5B2000-memory.dmp

Filesize
712KB

Download
memory/1868-93-0x0000000005A30000-0x0000000005A52000-memory.dmp

Filesize
136KB

Download
memory/1868-90-0x0000000005750000-0x000000000575A000-memory.dmp

Filesize
40KB

Download
memory/1868-84-0x0000000003E20000-0x0000000003E2A000-memory.dmp

Filesize
40KB

Download
memory/1868-88-0x000000001FDA0000-0x00000000200A0000-memory.dmp

Filesize
3.0MB

Download
memory/2696-73-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2696-61-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/2992-35-0x0000000001E90000-0x0000000001F90000-memory.dmp

Filesize
1024KB

Download
memory/2992-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2992-36-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/2992-1-0x0000000001E90000-0x0000000001F90000-memory.dmp

Filesize
1024KB

Download
memory/2992-2-0x0000000000230000-0x000000000029C000-memory.dmp

Filesize
432KB

Download
memory/2992-34-0x0000000000400000-0x0000000001A25000-memory.dmp

Filesize
22.1MB

Download
memory/3020-60-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3020-115-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3020-142-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3020-129-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download
memory/3020-138-0x0000000000400000-0x0000000002574000-memory.dmp

Filesize
33.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads