stealc | 132d0526eda9bdadbb2b402d44738d4fc91255556325b6a1991e053d1710fcce

Analysis

max time kernel
151s
max time network
162s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 08:26

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General

Target
96b085b3f6ee7441236cee54161309d0.exe
Size 405KB
Sample240426-kbvmqacf89
SHA256 132d0526eda9bdadbb2b402d44738d4fc91255556325b6a1991e053d1710fcce
MD5 96b085b3f6ee7441236cee54161309d0
SHA1 88cf7eaf5db9a625a4fd922afe4c851abdd86b0b
SHA512 23950cddb7d72685c12102438f1f38668a9206a4f5e3a0273558f4b7a2260183144e5f504d30d0659971b578a68de25b500b210217c17523b903d581f5085067
SSDEEP 12288:hOatvTLg/5HI+WnM93ss5WAlYjGJqMh8nbwr5:hjM5HsnMNmtSchnbwr5
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc stealer

Malware Config

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	96b085b3f6ee7441236cee54161309d0.exe

Executes dropped EXE 2 IoCs

pid	Process
4752	u10g.0.exe
444	run.exe

Loads dropped DLL 1 IoCs

pid	Process
444	run.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 444 set thread context of 4376	444	run.exe	105

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
2584	4752	WerFault.exe	90

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
444	run.exe
444	run.exe
4376	cmd.exe
4376	cmd.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
444	run.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
444	run.exe
444	run.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 4752	1312	96b085b3f6ee7441236cee54161309d0.exe	90
PID 1312 wrote to memory of 4752	1312	96b085b3f6ee7441236cee54161309d0.exe	90
PID 1312 wrote to memory of 4752	1312	96b085b3f6ee7441236cee54161309d0.exe	90
PID 1312 wrote to memory of 444	1312	96b085b3f6ee7441236cee54161309d0.exe	104
PID 1312 wrote to memory of 444	1312	96b085b3f6ee7441236cee54161309d0.exe	104
PID 1312 wrote to memory of 444	1312	96b085b3f6ee7441236cee54161309d0.exe	104
PID 444 wrote to memory of 4376	444	run.exe	105
PID 444 wrote to memory of 4376	444	run.exe	105
PID 444 wrote to memory of 4376	444	run.exe	105
PID 444 wrote to memory of 4376	444	run.exe	105
PID 4376 wrote to memory of 528	4376	cmd.exe	109
PID 4376 wrote to memory of 528	4376	cmd.exe	109
PID 4376 wrote to memory of 528	4376	cmd.exe	109

C:\Users\Admin\AppData\Local\Temp\96b085b3f6ee7441236cee54161309d0.exe
"C:\Users\Admin\AppData\Local\Temp\96b085b3f6ee7441236cee54161309d0.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Users\Admin\AppData\Local\Temp\u10g.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u10g.0.exe"
  2⤵
  - Executes dropped EXE
  PID:4752
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 1036
    3⤵
    - Program crash
    PID:2584
- C:\Users\Admin\AppData\Local\Temp\u10g.2\run.exe
  "C:\Users\Admin\AppData\Local\Temp\u10g.2\run.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:444
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\SysWOW64\cmd.exe
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4376
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      4⤵
      PID:528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4752 -ip 4752
1⤵
PID:1864

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:1668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

6fdabfe4

Path C:\Users\Admin\AppData\Local\Temp\6fdabfe4
Size 1.4MB
SHA256 e8e5ab5227215cce5e3c659e8e11ba4db6115e831ea2170ec8b74783027982e2
MD5 7b01926d9929b9f38a2272f727ca5634
SHA1 86795cbf06e68c4fb97b34db2bbe70054236f752
SHA512 b1f0cee2c0f51a81c5ec953ab3533dfd44655c55264d01d403317a5cde930b41f4a316eedb451f84b3f3bbedb31deb59586e312ab86b17011d49deec14dd7b1c
SSDEEP 24576:nVnUaTeOU+iBIyrUB772K+nuAT+1AB7jbZ0jb1nchwPBGaMIqa4cEEP9O4q90os2:SEUpAB772K+num+6B7jbZ0jb1nclaUak
MD5 SHA1 SHA512 SSDEEP

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u10g.0.exe

Path C:\Users\Admin\AppData\Local\Temp\u10g.0.exe
Size 261KB
SHA256 258d17ed78a307fa352a7781557ae8da981521a44aa6087b4a3dcb120bf46359
MD5 3feefb5213b0ff82fd83ac762ef28021
SHA1 b545ffc0ac45469aa841463a4fc184936111e2e8
SHA512 84d05d4577d9394318dca4aeb16727f9005bec3cb81a1961406de5d5380d679a128511da808baadacb6924d6a8fcb8e48fc36edc2bbe8b454e391b1838698c30
SSDEEP 6144:Xda8OjyNGuQI0KouJcN6vB2DBTKh8nTr:XdajjyfhBvB21uh8nTr
MD5 SHA1 SHA512 SSDEEP

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u10g.1.zip

Path C:\Users\Admin\AppData\Local\Temp\u10g.1.zip
Size 3.7MB
SHA256 a1dd547a63b256aa6a16871ed03f8b025226f7617e67b8817a08444df077b001
MD5 78d3ca6355c93c72b494bb6a498bf639
SHA1 2fa4e5df74bfe75c207c881a1b0d3bc1c62c8b0e
SHA512 1b2df7bee2514aee7efd3579f5dd33c76b40606d07dba69a34c45747662fad61174db4931bca02b058830107959205e889fee74f8ccc9f6e03f9fd111761f4ea
SSDEEP 98304:7goFFJ7lj6j1elkeoTNxPxDZhAryYACWcTIxlN+ba:7guJ7wpfTDPxD0P2YG
MD5 SHA1 SHA512 SSDEEP

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UIxMarketPlugin.dll

Path C:\Users\Admin\AppData\Local\Temp\u10g.2\UIxMarketPlugin.dll
Size 1.6MB
SHA256 cbcea8f28d8916219d1e8b0a8ca2db17e338eb812431bc4ad0cb36c06fd67f15
MD5 d1ba9412e78bfc98074c5d724a1a87d6
SHA1 0572f98d78fb0b366b5a086c2a74cc68b771d368
SHA512 8765de36d3824b12c0a4478c31b985878d4811bd0e5b6fba4ea07f8c76340bd66a2da3490d4871b95d9a12f96efc25507dfd87f431de211664dbe9a9c914af6f
SSDEEP 49152:/7Q2CH7FiYk7q8wOP2nyh9VgFdJYZL6MsQv4Pvg3KIA8wuSgKacXTT3Kos2lpm:sZH7FZk7LP2nyh9VgFdJYZL6NQgPVIAv
MD5 SHA1 SHA512 SSDEEP

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bunch.dat

Path C:\Users\Admin\AppData\Local\Temp\u10g.2\bunch.dat
Size 1.3MB
SHA256 9387488f9d338e211be2cb45109bf590a5070180bc0d4a703f70d3cb3c4e1742
MD5 1e8237d3028ab52821d69099e0954f97
SHA1 30a6ae353adda0c471c6ed5b7a2458b07185abf2
SHA512 a6406d7c18694ee014d59df581f1f76e980b68e3361ae680dc979606a423eba48d35e37f143154dd97fe5f066baf0ea51a2e9f8bc822d593e1cba70ead6559f3
SSDEEP 24576:7vktfYOP8kCc3P/X970uBuBFA3S8Fa+/D9kGmk3Lh9AvPG:7vk5H8LIt1e2Sl+if2YG
MD5 SHA1 SHA512 SSDEEP

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relay.dll

Path C:\Users\Admin\AppData\Local\Temp\u10g.2\relay.dll
Size 1.5MB
SHA256 7b2db9c88f60ed6dd24b1dec321a304564780fdb191a96ec35c051856128f1ed
MD5 10d51becd0bbce0fab147ff9658c565e
SHA1 4689a18112ff876d3c066bc8c14a08fd6b7b7a4a
SHA512 29faf493bb28f7842c905adc5312f31741effb09f841059b53d73b22aea2c4d41d73db10bbf37703d6aeb936ffacbc756a3cc85ba3c0b6a6863ef4d27fefcd29
SSDEEP 49152:n2gm39uH+I5/GxEoadcqX7Q9F7r40YB+eTcq+PDXx1lWz0v2:DmtuH+e/RoadcqX7Qz7rDY8vq+Pbx1lc
MD5 SHA1 SHA512 SSDEEP

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run.exe

Path C:\Users\Admin\AppData\Local\Temp\u10g.2\run.exe
Size 2.4MB
SHA256 a05b592a971fe5011554013bcfe9a4aaf9cfc633bdd1fe3a8197f213d557b8d3
MD5 9fb4770ced09aae3b437c1c6eb6d7334
SHA1 fe54b31b0db8665aa5b22bed147e8295afc88a03
SHA512 140fee6daf23fe8b7e441b3b4de83554af804f00ecedc421907a385ac79a63164bd9f28b4be061c2ea2262755d85e14d3a8e7dc910547837b664d78d93667256
SSDEEP 49152:Y8UMSn5cV2N9LNwtQ5gRR+moI1axGbYj6QAl4ImDkg7d5lROCDG5yzlC97W+uJUM:QMS5hN9OtQ5gRjoI8xGbYj6QAl4gg7dF
MD5 SHA1 SHA512 SSDEEP

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whale.dbf

Path C:\Users\Admin\AppData\Local\Temp\u10g.2\whale.dbf
Size 85KB
SHA256 b440170853bdb43b66497f701aee2901080326975140b095a1669cb9dee13422
MD5 a723bf46048e0bfb15b8d77d7a648c3e
SHA1 8952d3c34e9341e4425571e10f22b782695bb915
SHA512 ca8ea2f7f3c7af21b5673a0a3f2611b6580a7ed02efa2cfd8b343eb644ff09682bde43b25ef7aab68530d5ce31dcbd252c382dd336ecb610d4c4ebde78347273
SSDEEP 1536:X5B5jj6bWG+5cAD2Fno6ktTgDa+0rldAe7VwDb4bWTfmdI7p:X5Ljj6bi512Fn3b0Ie7qgbWd9
MD5 SHA1 SHA512 SSDEEP

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memory/444-123-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/444-121-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/444-115-0x00007FFC6DD70000-0x00007FFC6DF65000-memory.dmp

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memory/444-114-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/1312-1-0x0000000004250000-0x0000000004350000-memory.dmp

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memory/1312-16-0x0000000000400000-0x0000000004056000-memory.dmp

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memory/1312-15-0x0000000004250000-0x0000000004350000-memory.dmp

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memory/1312-29-0x0000000000400000-0x0000000004056000-memory.dmp

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memory/1312-3-0x0000000000400000-0x0000000004056000-memory.dmp

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memory/1312-122-0x0000000000400000-0x0000000004056000-memory.dmp

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memory/1312-17-0x0000000005CF0000-0x0000000005D5D000-memory.dmp

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memory/1312-2-0x0000000005CF0000-0x0000000005D5D000-memory.dmp

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memory/4376-127-0x00007FFC6DD70000-0x00007FFC6DF65000-memory.dmp

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memory/4376-132-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/4376-131-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/4376-125-0x0000000072E70000-0x0000000072FEB000-memory.dmp

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memory/4752-13-0x00000000043F0000-0x00000000044F0000-memory.dmp

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memory/4752-18-0x0000000000400000-0x0000000004033000-memory.dmp

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memory/4752-14-0x0000000004190000-0x00000000041B7000-memory.dmp

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