guloader | 0749beb8fd852d4d82f7e2917f861ac4d8ec36b1363b6df47b202e3120aebd12

Analysis

max time kernel
152s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
15/06/2023, 05:36

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General

Target

ESCO-PO-Q10056286.exe
Size

793KB
MD5

ea6118b2fe55e3acc84115be3edaa2f5
SHA1

c712674a10c04c03271635c51db9fd38f62dac0e
SHA256

0749beb8fd852d4d82f7e2917f861ac4d8ec36b1363b6df47b202e3120aebd12
SHA512

a5a2337045e7f95dd7dd00d06f7f08da9202b528c1f4532d48a7b5f994daa953355631dd643334e86a4bbd6517df239dcbc3d189e555df05fb4986ff5fa6b618
SSDEEP

24576:r92LKyG5+emhIIiE3ZPbXJ/hMe25Whpw8P:gFG/lQJDVhk5WHfP

Score

10^/10

guloader warzonerat downloader evasion infostealer persistence rat upx

Malware Config

Extracted

Family

warzonerat

jabsgu.kozow.com:6186

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
WarzoneRat, AveMaria
WarzoneRat is a native RAT developed in C++ with multiple plugins sold as a MaaS.
rat infostealer warzonerat

Warzone RAT payload 8 IoCs

rat

resource	yara_rule
behavioral2/memory/2040-155-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-159-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-177-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-179-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-180-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-181-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-182-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat
behavioral2/memory/2040-183-0x0000000000400000-0x0000000001654000-memory.dmp	warzonerat

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
3464	netsh.exe

Sets DLL path for service in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\TermService\Parameters\ServiceDll = "%ProgramFiles%\\Microsoft DN1\\sqlmap.dll"	ESCO-PO-Q10056286.exe

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ESCO-PO-Q10056286.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ESCO-PO-Q10056286.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	ESCO-PO-Q10056286.exe

Executes dropped EXE 1 IoCs

pid	Process
2860	76.exe

Loads dropped DLL 2 IoCs

pid	Process
2164	ESCO-PO-Q10056286.exe
3556	svchost.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0006000000022fa6-165.dat	upx
behavioral2/files/0x0006000000022fa6-168.dat	upx
behavioral2/files/0x0006000000022fa6-169.dat	upx
behavioral2/memory/2860-173-0x00000000006D0000-0x00000000006FD000-memory.dmp	upx

Modifies WinLogon 2 TTPs 4 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\AllowMultipleTSSessions = "1"	ESCO-PO-Q10056286.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList	ESCO-PO-Q10056286.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts	ESCO-PO-Q10056286.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList\C.f.kBw = "0"	ESCO-PO-Q10056286.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\rfxvmt.dll	ESCO-PO-Q10056286.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2040	ESCO-PO-Q10056286.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2164	ESCO-PO-Q10056286.exe
2040	ESCO-PO-Q10056286.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2164 set thread context of 2040	2164	ESCO-PO-Q10056286.exe	89

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Udyderne\Nonterminable\Dithionate.ini	ESCO-PO-Q10056286.exe
File created	C:\Program Files (x86)\Common Files\Ploce50\Underkjolers\Cetes.lnk	ESCO-PO-Q10056286.exe
File created	C:\Program Files\Microsoft DN1\sqlmap.dll	ESCO-PO-Q10056286.exe
File created	C:\Program Files\Microsoft DN1\rdpwrap.ini	ESCO-PO-Q10056286.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4904	2860	WerFault.exe	92

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3556	svchost.exe
3556	svchost.exe
3556	svchost.exe
3556	svchost.exe

Suspicious behavior: LoadsDriver 1 IoCs

pid	Process
672	Process not Found

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2164	ESCO-PO-Q10056286.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: 33	1064	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1064	AUDIODG.EXE
Token: SeDebugPrivilege	2040	ESCO-PO-Q10056286.exe
Token: SeAuditPrivilege	3556	svchost.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 2040	2164	ESCO-PO-Q10056286.exe	89
PID 2164 wrote to memory of 2040	2164	ESCO-PO-Q10056286.exe	89
PID 2164 wrote to memory of 2040	2164	ESCO-PO-Q10056286.exe	89
PID 2164 wrote to memory of 2040	2164	ESCO-PO-Q10056286.exe	89
PID 2040 wrote to memory of 2860	2040	ESCO-PO-Q10056286.exe	92
PID 2040 wrote to memory of 2860	2040	ESCO-PO-Q10056286.exe	92
PID 2040 wrote to memory of 2860	2040	ESCO-PO-Q10056286.exe	92
PID 2860 wrote to memory of 3464	2860	76.exe	93
PID 2860 wrote to memory of 3464	2860	76.exe	93
PID 2860 wrote to memory of 3464	2860	76.exe	93

C:\Users\Admin\AppData\Local\Temp\ESCO-PO-Q10056286.exe
"C:\Users\Admin\AppData\Local\Temp\ESCO-PO-Q10056286.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Users\Admin\AppData\Local\Temp\ESCO-PO-Q10056286.exe
  "C:\Users\Admin\AppData\Local\Temp\ESCO-PO-Q10056286.exe"
  2⤵
  - Sets DLL path for service in the registry
  - Checks QEMU agent file
  - Checks computer location settings
  - Modifies WinLogon
  - Drops file in System32 directory
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Users\Admin\AppData\Local\Temp\76.exe
    "C:\Users\Admin\AppData\Local\Temp\76.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:2860
  - - C:\Windows\SysWOW64\netsh.exe
      netsh advfirewall firewall add rule name="3389" dir=in action=allow protocol=TCP localport=3389
      4⤵
      Modifies Windows Firewall
      PID:3464
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2860 -s 236
      4⤵
      Program crash
      PID:4904

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x2f8 0x2f4
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1064

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -s TermService
1⤵
PID:1472

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k NetworkService -s TermService
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2860 -ip 2860
1⤵
PID:3216

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\Microsoft DN1\sqlmap.dll

Filesize
114KB

MD5
461ade40b800ae80a40985594e1ac236

SHA1
b3892eef846c044a2b0785d54a432b3e93a968c8

SHA256
798af20db39280f90a1d35f2ac2c1d62124d1f5218a2a0fa29d87a13340bd3e4

SHA512
421f9060c4b61fa6f4074508602a2639209032fd5df5bfc702a159e3bad5479684ccb3f6e02f3e38fb8db53839cf3f41fe58a3acad6ec1199a48dc333b2d8a26

Download Submit
C:\Users\Admin\AppData\Local\Temp\76.exe

Filesize
70KB

MD5
ca96229390a0e6a53e8f2125f2c01114

SHA1
a54b1081cf58724f8cb292b4d165dfee2fb1c9f6

SHA256
0df3d05900e7b530f6c2a281d43c47839f2cf2a5d386553c8dc46e463a635a2c

SHA512
e93445bce6c8b6f51890309577a0ea9369860d2e6bf8cc0ca708879a77bb176d27c5f559bbdb7deb4b719aee0fc48d9068c293559f7629baf4ec3515898102ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\76.exe

Filesize
70KB

MD5
ca96229390a0e6a53e8f2125f2c01114

SHA1
a54b1081cf58724f8cb292b4d165dfee2fb1c9f6

SHA256
0df3d05900e7b530f6c2a281d43c47839f2cf2a5d386553c8dc46e463a635a2c

SHA512
e93445bce6c8b6f51890309577a0ea9369860d2e6bf8cc0ca708879a77bb176d27c5f559bbdb7deb4b719aee0fc48d9068c293559f7629baf4ec3515898102ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\76.exe

Filesize
70KB

MD5
ca96229390a0e6a53e8f2125f2c01114

SHA1
a54b1081cf58724f8cb292b4d165dfee2fb1c9f6

SHA256
0df3d05900e7b530f6c2a281d43c47839f2cf2a5d386553c8dc46e463a635a2c

SHA512
e93445bce6c8b6f51890309577a0ea9369860d2e6bf8cc0ca708879a77bb176d27c5f559bbdb7deb4b719aee0fc48d9068c293559f7629baf4ec3515898102ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrE48A.tmp\System.dll

Filesize
11KB

MD5
be2621a78a13a56cf09e00dd98488360

SHA1
75f0539dc6af200a07cdb056cddddec595c6cfd2

SHA256
852047023ba0cae91c7a43365878613cfb4e64e36ff98c460e113d5088d68ef5

SHA512
b80cf1f678e6885276b9a1bfd9227374b2eb9e38bb20446d52ebe2c3dba89764aa50cb4d49df51a974478f3364b5dbcbc5b4a16dc8f1123b40c89c01725be3d1

Download Submit
\??\c:\program files\microsoft dn1\rdpwrap.ini

Filesize
321KB

MD5
5c2160799c3fc664c83bbc9958eede94

SHA1
7d39f7d2fb2a302779a28efd0f1c85589cfef066

SHA256
d91ae65f689c4f70b27de6941f81e9b1600447a920162a3e69ad734bac62ecd5

SHA512
681d697f1a79baa6892e1a8da03ca9b63d118cbc587784db9ed4664e49e10731b9ab0d6e0379fd65325ae586f7afb2a2f839f8c3a8ec9ebdbe1a045a26f229df

Download Submit
\??\c:\program files\microsoft dn1\sqlmap.dll

Filesize
114KB

MD5
461ade40b800ae80a40985594e1ac236

SHA1
b3892eef846c044a2b0785d54a432b3e93a968c8

SHA256
798af20db39280f90a1d35f2ac2c1d62124d1f5218a2a0fa29d87a13340bd3e4

SHA512
421f9060c4b61fa6f4074508602a2639209032fd5df5bfc702a159e3bad5479684ccb3f6e02f3e38fb8db53839cf3f41fe58a3acad6ec1199a48dc333b2d8a26

Download Submit
memory/2040-180-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-179-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-154-0x0000000001660000-0x000000000465A000-memory.dmp

Filesize
48.0MB

Download
memory/2040-153-0x0000000001660000-0x000000000465A000-memory.dmp

Filesize
48.0MB

Download
memory/2040-152-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-183-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-159-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-182-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-158-0x0000000001660000-0x000000000465A000-memory.dmp

Filesize
48.0MB

Download
memory/2040-177-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-181-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2040-155-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2164-151-0x00000000041B0000-0x00000000071AA000-memory.dmp

Filesize
48.0MB

Download
memory/2164-150-0x00000000041B0000-0x00000000071AA000-memory.dmp

Filesize
48.0MB

Download
memory/2860-173-0x00000000006D0000-0x00000000006FD000-memory.dmp

Filesize
180KB

Download