guloader | 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86

General

Target

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
Size

933KB
MD5

643c1b8444da8c89fa83aed917307b6c
SHA1

dda8fa31873ef7f27e22f712a2e0b6a7ae91a582
SHA256

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86
SHA512

61636bf0eabf40ef8085a68170339184a73b7a3a528604853a75e577b549240de7a78a1c879757b510a13746184caf678d05e1e77c8c7a9241cbd7c2e2b87def
SSDEEP

12288:2dD2EUL1JUodNF0bzjryAqlBGWcz+izP1niQPqDEfRuLCMrecszC/:wD2EK1JzW3jGxBGDaizPkY6/mMScs2

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 6 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid	process
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid process

1868 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid	process
4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
1868	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

description	pid	process	target process
PID 4624 set thread context of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1420 1868 WerFault.exe 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid	pid_target	process	target process
1420	1868	WerFault.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid	process
1868	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
1868	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

pid process

4624 137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

description	pid	process	target process
PID 4624 wrote to memory of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
PID 4624 wrote to memory of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
PID 4624 wrote to memory of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
PID 4624 wrote to memory of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
PID 4624 wrote to memory of 1868	4624	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe	137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe

C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
"C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4624
- C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe
  "C:\Users\Admin\AppData\Local\Temp\137742d1bb597a2818431b1634f38a9d93069afc1657955ef7144c152eb26f86.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:1868
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 1232
    3⤵
    - Program crash
    PID:1420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1868 -ip 1868
1⤵
PID:1228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsa8629.tmp\LangDLL.dll

Filesize
5KB

MD5
61f69388ae89d61a3d838cbcf81b4f82

SHA1
e595c0236a373a6ac79c334dc183ee03ca8f8ecd

SHA256
d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61

SHA512
21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsa8629.tmp\System.dll

Filesize
11KB

MD5
4ca4fd3fbefa2f6e87e6e9ee87d1c0b3

SHA1
7cdbeb5ff2b14b86af04e075d0ca651183ea5df4

SHA256
d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57

SHA512
cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

Download Submit
memory/1868-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-46-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-45-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-34-0x0000000001660000-0x00000000026FE000-memory.dmp

Filesize
16.6MB

Download
memory/1868-35-0x00000000771A8000-0x00000000771A9000-memory.dmp

Filesize
4KB

Download
memory/1868-36-0x00000000771C5000-0x00000000771C6000-memory.dmp

Filesize
4KB

Download
memory/1868-38-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/1868-44-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-39-0x0000000001660000-0x00000000026FE000-memory.dmp

Filesize
16.6MB

Download
memory/1868-40-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-42-0x0000000077121000-0x0000000077241000-memory.dmp

Filesize
1.1MB

Download
memory/1868-43-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/4624-29-0x0000000004A20000-0x0000000005ABE000-memory.dmp

Filesize
16.6MB

Download
memory/4624-30-0x0000000077121000-0x0000000077241000-memory.dmp

Filesize
1.1MB

Download
memory/4624-32-0x0000000004A20000-0x0000000005ABE000-memory.dmp

Filesize
16.6MB

Download
memory/4624-31-0x0000000073F84000-0x0000000073F85000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads