gurcu | fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

Analysis

max time kernel
144s
max time network
171s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
05-05-2023 20:38

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General

Target

fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Size

165KB
MD5

547933c1a8ea0eb111e619d70ca2c657
SHA1

aca394a095c3951ace115ac621a67df1ff4d2e33
SHA256

fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea
SHA512

5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b
SSDEEP

1536:ROwwIJbzij3pPEOGFmd8Szav8IDYFUxT1DR5jPVSBSVG41AG9wL4yXacCwPIC6Xi:RyIlz2p8Yai3GNzDeeb4FzeDGwKSHqj

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Executes dropped EXE 6 IoCs

pid	Process
1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
1000	tor.exe
1488	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
3816	tor.exe
2236	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
1360	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 1 IoCs

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

flow	ioc
16	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
2484	1488	WerFault.exe	95
1668	2236	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
2336	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
388	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Token: SeDebugPrivilege	1488	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
Token: SeDebugPrivilege	2236	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1228 wrote to memory of 3748	1228	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	83
PID 1228 wrote to memory of 3748	1228	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	83
PID 3748 wrote to memory of 988	3748	cmd.exe	85
PID 3748 wrote to memory of 988	3748	cmd.exe	85
PID 3748 wrote to memory of 388	3748	cmd.exe	86
PID 3748 wrote to memory of 388	3748	cmd.exe	86
PID 3748 wrote to memory of 2336	3748	cmd.exe	87
PID 3748 wrote to memory of 2336	3748	cmd.exe	87
PID 3748 wrote to memory of 1276	3748	cmd.exe	88
PID 3748 wrote to memory of 1276	3748	cmd.exe	88
PID 1276 wrote to memory of 4920	1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	91
PID 1276 wrote to memory of 4920	1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	91
PID 1276 wrote to memory of 1000	1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	93
PID 1276 wrote to memory of 1000	1276	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	93
PID 1488 wrote to memory of 3816	1488	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	96
PID 1488 wrote to memory of 3816	1488	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	96
PID 2236 wrote to memory of 1360	2236	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe	107
PID 2236 wrote to memory of 1360	2236	fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.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\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
"C:\Users\Admin\AppData\Local\Temp\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1228
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" &&START "" "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:988
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:388
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2336
- - C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
    "C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1276
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp53AE.tmp" -C "C:\Users\Admin\AppData\Local\d92pmiifqt"
      4⤵
      PID:4920
  - - C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe
      "C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1000

C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:3816
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1488 -s 1640
  2⤵
  - Program crash
  PID:2484

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 416 -p 1488 -ip 1488
1⤵
PID:800

C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe
  "C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1360
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2236 -s 1620
  2⤵
  - Program crash
  PID:1668

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 472 -p 2236 -ip 2236
1⤵
PID:3824

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\Microsoft\CLR_v4.0\UsageLogs\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Filesize
165KB

MD5
547933c1a8ea0eb111e619d70ca2c657

SHA1
aca394a095c3951ace115ac621a67df1ff4d2e33

SHA256
fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

SHA512
5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Filesize
165KB

MD5
547933c1a8ea0eb111e619d70ca2c657

SHA1
aca394a095c3951ace115ac621a67df1ff4d2e33

SHA256
fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

SHA512
5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Filesize
165KB

MD5
547933c1a8ea0eb111e619d70ca2c657

SHA1
aca394a095c3951ace115ac621a67df1ff4d2e33

SHA256
fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

SHA512
5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

Download Submit
C:\Users\Admin\AppData\Local\NET.Framework\fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea.exe

Filesize
165KB

MD5
547933c1a8ea0eb111e619d70ca2c657

SHA1
aca394a095c3951ace115ac621a67df1ff4d2e33

SHA256
fdc83f58a30b80240c5887c6646324600f3896421059b80caddacfdb196287ea

SHA512
5df1b41c5f19e304cc0758b175252c17cc6ccb1d3d91ba2f153138dfbd8e2ef3cd6efe8a136559c55952bdb43a7f206f7ba4e04674ee95363ca8409e48745c2b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp53AE.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\data\cached-microdesc-consensus.tmp

Filesize
2.3MB

MD5
cf90fa3a9a4f38a4bc7062852dec45ba

SHA1
0ba595a323aca695c9c57a5e0b63b879d9feabfa

SHA256
0851ef13b0a8c84cbffaacfa40442d3cd1bfb47e1114fbe74e2a42fd7a6e6131

SHA512
f77a9aaf72bf408eec09bd60d82fde0b4190cbaae2c5e74b8c577f19050a5e5063c2a0e7b78d70ee2fa63e86584a0bd8106b8d0e953bf59dc80eb1caabee410f

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\data\cached-microdescs.new

Filesize
5.1MB

MD5
05e7c8a117c61dc5b055f8e5482995b2

SHA1
25ad208f99695d1bbb3d707be1763c8914b741d8

SHA256
052da0c50387a8b8519c8f0f3ff9762d7576e3bf9d4b8a83f59ec23645d354bb

SHA512
593712a0a61f4a29e2593902724408016637164a456d8613ba1fcc12188986ff27f80a53279ce2d93eaea90846c1f33a64837e2658cc221940724fd8b00db978

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\host\hostname

Filesize
64B

MD5
9d94b34fe37b0408ef07d17f82111ae6

SHA1
9b77d88a73d3d730dafb6adf4ac0cb819be53bbc

SHA256
7679064fd053223ae8482426468ea2d2e94a254837ea025993f7cf27890deea4

SHA512
4a94a5113742cfdbeca55049fdfd8eada5189c57eb9a6028f48a6d5c60de80975af14af94f4085f70d5171b8b70598dc3e6850d7a2f768f58e15316eab25b1a1

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\port.dat

Filesize
4B

MD5
805163a0f0f128e473726ccda5f91bac

SHA1
da79479a7e4685873b2166f1bcc5e601e7b33466

SHA256
c88df307576db7934882aafb2e6e3c575476ee42e9f0959affcda9ee6e1ce801

SHA512
e80c9c3aa3df554e9266ec649c459e2dba97ff7dc1bae2ad1c9fd5617419a1d7194878fe88522966201399de34642844b9ebaba487d92546d2b5846274348868

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\d92pmiifqt\torrc.txt

Filesize
218B

MD5
d4bc5dc87503c88747024003f3b08b20

SHA1
4237159cb498ff3ea41444dce1858ed269b5d725

SHA256
85a8f964b477fd8cd722197d47525e9efaff77efe1b4999ef143267631c968a7

SHA512
8a310950fc2c2e519cba9edcbf22df6b17af1147e8ca5ba379b64d508e5d1e4b1a7e76386eae715210e28bacf41552ca9e696004588d8192f9a1073357c5802c

Download Submit
memory/1228-133-0x000001A76D4E0000-0x000001A76D510000-memory.dmp

Filesize
192KB

Download
memory/1276-143-0x00000266DC230000-0x00000266DC240000-memory.dmp

Filesize
64KB

Download
memory/1276-141-0x00000266DC230000-0x00000266DC240000-memory.dmp

Filesize
64KB

Download
memory/1488-190-0x000002A67BEA0000-0x000002A67BEB0000-memory.dmp

Filesize
64KB

Download
memory/2236-211-0x0000023CB7F60000-0x0000023CB7F70000-memory.dmp

Filesize
64KB

Download
memory/2236-212-0x0000023CB7F60000-0x0000023CB7F70000-memory.dmp

Filesize
64KB

Download