gurcu | e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

Resubmissions

10-04-2024 02:17

240410-cqs4fafc2v 10

10-04-2024 02:17

10-04-2024 02:17

10-04-2024 02:17

13-05-2023 22:56

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
13-05-2023 22:56

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General

Target

qsteemp.exe
Size

165KB
MD5

90cd3202af31b431dcc5e47cf3b8c0d7
SHA1

747f68fb8f122241059c219eeeeadac61e8215be
SHA256

e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732
SHA512

b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481
SSDEEP

3072:fV6h5WXwyNUD44ykiQbGjlc/SGvjQtbGTl2MRMc:9AuwMPkhbGRc/T6A

Score

10^/10

gurcu spyware stealer

Malware Config

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 4 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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	qsteemp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	qsteemp.exe

Executes dropped EXE 6 IoCs

pid	Process
440	qsteemp.exe
3892	tor.exe
4948	qsteemp.exe
4780	tor.exe
4464	qsteemp.exe
2932	tor.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	ip-api.com
130	ip-api.com

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
2800	4948	WerFault.exe	98
2244	4464	WerFault.exe	106

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2772	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4832	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
440	qsteemp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	440	qsteemp.exe
Token: SeDebugPrivilege	4948	qsteemp.exe
Token: SeDebugPrivilege	4464	qsteemp.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 3412	4376	qsteemp.exe	83
PID 4376 wrote to memory of 3412	4376	qsteemp.exe	83
PID 3412 wrote to memory of 4464	3412	cmd.exe	85
PID 3412 wrote to memory of 4464	3412	cmd.exe	85
PID 3412 wrote to memory of 4832	3412	cmd.exe	86
PID 3412 wrote to memory of 4832	3412	cmd.exe	86
PID 3412 wrote to memory of 2772	3412	cmd.exe	87
PID 3412 wrote to memory of 2772	3412	cmd.exe	87
PID 3412 wrote to memory of 440	3412	cmd.exe	88
PID 3412 wrote to memory of 440	3412	cmd.exe	88
PID 440 wrote to memory of 244	440	qsteemp.exe	89
PID 440 wrote to memory of 244	440	qsteemp.exe	89
PID 440 wrote to memory of 3892	440	qsteemp.exe	91
PID 440 wrote to memory of 3892	440	qsteemp.exe	91
PID 4948 wrote to memory of 4780	4948	qsteemp.exe	101
PID 4948 wrote to memory of 4780	4948	qsteemp.exe	101
PID 4464 wrote to memory of 2932	4464	qsteemp.exe	107
PID 4464 wrote to memory of 2932	4464	qsteemp.exe	107

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\qsteemp.exe
"C:\Users\Admin\AppData\Local\Temp\qsteemp.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\qsteemp.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4464
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4832
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "qsteemp" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2772
- - C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
    "C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:440
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp9FEE.tmp" -C "C:\Users\Admin\AppData\Local\6kfrvwd31o"
      4⤵
      PID:244
  - - C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
      "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:3892

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4780
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 4948 -s 2036
  2⤵
  - Program crash
  PID:2800

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 424 -p 4948 -ip 4948
1⤵
PID:3228

C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4464
- C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe
  "C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2932
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 4464 -s 1916
  2⤵
  - Program crash
  PID:2244

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 452 -p 4464 -ip 4464
1⤵
PID:3412

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdesc-consensus.tmp

Filesize
2.3MB

MD5
4420df5ac9bad5913e290ac053dbe1a6

SHA1
e7d3925d0bab3bda3f3b11e2ede219a4c55c1d6c

SHA256
76aedd97fda4e32b44e99930fd823cb70a49ba9ddf7fd40fcd4e2289ed6d8db1

SHA512
243f5b92e96b7245354e40c08ceb28eb4fad8921d157c86f81fbe8f625d15186b66f5b2f094eb312cac529582e277d223646b9c4ab7ddae0feea1f14d5552335

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\data\cached-microdescs.new

Filesize
13.0MB

MD5
640dc3cdd6d4c452f3028843488c1eda

SHA1
fc66b555852c816dcd8235c902d35e04c0918fce

SHA256
20bdd1df6d606d683a087ba34fecad763da40c29dbe5bbdbdf45a959774c75d4

SHA512
4effa4fe6a7cd4fbc0b678113b2a8188f076dbe15bc6d85b3ba0b1fd406067007806aa7f1f3dce3aa595aeb9144e80464ffcd6fc791f99cbecb7379b67d6f2df

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\host\hostname

Filesize
64B

MD5
ad9b49e4f178b9c1277438f480fb9bbe

SHA1
ddaf841e276ede431557a2d04ce16056509f581b

SHA256
b41de64a249a99931b6ee530e1e57938310248168e33271254486bddc5201d77

SHA512
17f76e6ae5807ea305d6765bee7f505a5448879e918e9a92bedbc19e6adcbf50f9cf53aabfdde825d52aa6e71aa7cf6fbde3abb18c5e90fbcb7566fed76e1dd7

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\port.dat

Filesize
4B

MD5
77305c2f862ad1d353f55bf38e5a5183

SHA1
db667c0b2e0c54430dd741993db8d4af89482889

SHA256
3b9f84399baa1776bb6ed76ff4095f29d8e8128039d2d23300a3087733cb0a4c

SHA512
3a6e84882d05211af8f6415a27ba2911067625a9b3563434648aeceadc723181da58dd891ab7ba1054fe51c9c9bbadceba14b45814c49d8be3adbb726de18c3c

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\6kfrvwd31o\torrc.txt

Filesize
218B

MD5
68ca994b32299bad9a7c065523c214a6

SHA1
3c8c9310b4e3e55a77346139f9f96d3922321e04

SHA256
8cefa623996a99cf4771db9a1aadc12da9cc7c2b9b9a33eb5be1dc53caef9962

SHA512
1911725237fa7cbe1d76439f01c4075574f02b9401e850677963515b7c932124f4bed8ac3f481de3eb4ebe71ecf6a0b00481d17d717d0735dc3e2d6f4e618810

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\qsteemp.exe.log

Filesize
1KB

MD5
fc1be6f3f52d5c841af91f8fc3f790cb

SHA1
ac79b4229e0a0ce378ae22fc6104748c5f234511

SHA256
6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

SHA512
2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

Filesize
165KB

MD5
90cd3202af31b431dcc5e47cf3b8c0d7

SHA1
747f68fb8f122241059c219eeeeadac61e8215be

SHA256
e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

SHA512
b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

Filesize
165KB

MD5
90cd3202af31b431dcc5e47cf3b8c0d7

SHA1
747f68fb8f122241059c219eeeeadac61e8215be

SHA256
e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

SHA512
b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

Filesize
165KB

MD5
90cd3202af31b431dcc5e47cf3b8c0d7

SHA1
747f68fb8f122241059c219eeeeadac61e8215be

SHA256
e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

SHA512
b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\qsteemp.exe

Filesize
165KB

MD5
90cd3202af31b431dcc5e47cf3b8c0d7

SHA1
747f68fb8f122241059c219eeeeadac61e8215be

SHA256
e76e206e8ae24f95a329b4f6ecdf1f22b76b07a8c628c0619b781bdba2d85732

SHA512
b1025ca0dfa86cd6649337bfc6b555a9101fce38955566424955a6fe07782bea41eeaf4f233946eb6be5756b23398129bad98a87c6b07478f787df8bf3235481

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9FEE.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
memory/440-186-0x000002B750600000-0x000002B750610000-memory.dmp

Filesize
64KB

Download
memory/440-143-0x000002B750600000-0x000002B750610000-memory.dmp

Filesize
64KB

Download
memory/4376-134-0x000001A9F8180000-0x000001A9F8190000-memory.dmp

Filesize
64KB

Download
memory/4376-133-0x000001A9DDB60000-0x000001A9DDB90000-memory.dmp

Filesize
192KB

Download
memory/4948-207-0x000001F0FC930000-0x000001F0FC940000-memory.dmp

Filesize
64KB

Download