8bbea8a36c81b62efe65826abf8358ef7436878fb31583fc28b32e6fe6ea3b7d

General

Target
c1a4f22fa0d4713d224c7b534c1c8fc5.exe
Size 97KB
Sample240311-1accragh46
SHA256 8bbea8a36c81b62efe65826abf8358ef7436878fb31583fc28b32e6fe6ea3b7d
MD5 c1a4f22fa0d4713d224c7b534c1c8fc5
SHA1 c4ac3a91e606e01a4bfee3b1c9e24a7af2cc8ebd
SHA512 fa7b1d190e0e379aec67f837fbc030a348dcd4e757c44b22121688bc879e91a3936cde8c764e91079a69a0aacd5d5ff575ba0c68f299f273c21badccf22116b3
SSDEEP 1536:SKcR4mjD9r823FRZg/A/Gv9zPGqP29M+Mn1fZKHMNLma9hSS72r:SKcWmjRrz3LZ64IVln1f3Lh9x7O
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4184	iLmCc5MvICKnTaS.exe
4216	CTS.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
T1552.001

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4140-0-0x0000000000610000-0x0000000000627000-memory.dmp	upx
behavioral2/memory/4140-1-0x0000000000610000-0x0000000000627000-memory.dmp	upx
behavioral2/memory/4140-8-0x0000000000610000-0x0000000000627000-memory.dmp	upx
behavioral2/files/0x000700000002325f-7.dat	upx
behavioral2/memory/4216-9-0x0000000000F50000-0x0000000000F67000-memory.dmp	upx
behavioral2/files/0x00070000000224f9-14.dat	upx
behavioral2/memory/4216-28-0x0000000000F50000-0x0000000000F67000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	c1a4f22fa0d4713d224c7b534c1c8fc5.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\CTS.exe	c1a4f22fa0d4713d224c7b534c1c8fc5.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe
Token: SeDebugPrivilege	4216	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4140 wrote to memory of 4184	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	97
PID 4140 wrote to memory of 4184	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	97
PID 4140 wrote to memory of 4184	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	97
PID 4140 wrote to memory of 4216	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	99
PID 4140 wrote to memory of 4216	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	99
PID 4140 wrote to memory of 4216	4140	c1a4f22fa0d4713d224c7b534c1c8fc5.exe	99

C:\Users\Admin\AppData\Local\Temp\c1a4f22fa0d4713d224c7b534c1c8fc5.exe
"C:\Users\Admin\AppData\Local\Temp\c1a4f22fa0d4713d224c7b534c1c8fc5.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Users\Admin\AppData\Local\Temp\iLmCc5MvICKnTaS.exe
  C:\Users\Admin\AppData\Local\Temp\iLmCc5MvICKnTaS.exe
  2⤵
  - Executes dropped EXE
  PID:4184
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious use of AdjustPrivilegeToken
  PID:4216

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=4352 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:4608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 747KB
SHA256 dbfcaf43b0fce7d26bd69ac8aef83ebaebba0c830a9d427eb63808cd83bee1e9
MD5 00b994bd29734be850ff1e3054847d8b
SHA1 52e351e4c35f61852c2ac8b2229973608e7f5d9b
SHA512 8eef092ee232f84de0aef8c80b152e50a4ee5a8d6f9e5c48ca885fd16834f3b062df6d6bdc6a5599c474177953604f3833f99336866befdd336a6edc61acf663
SSDEEP 12288:hCvTXT6Q2L9ZlDbm8WoesX6BOsg2U97zsHt+gy5jOp/8XCKSVyq+6YMETeZxQVAF:hCrjm9ZlDbmMeI6Osg2as8X5Kp/KSdY2
MD5 SHA1 SHA512 SSDEEP

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iLmCc5MvICKnTaS.exe

Path C:\Users\Admin\AppData\Local\Temp\iLmCc5MvICKnTaS.exe
Size 67KB
SHA256 6852f4faa2d0ae8be06c198c40875c9ecc466c2da9f6899b6d1f80e7df80b5e9
MD5 50e9d1438f14e3e345db6b9f15473be0
SHA1 20b511d23f4df169b10d6cd022e90b3441af038a
SHA512 65dcd5c3ee197727beef8c5bfef4073d9ed93c6662827721310dcbc0ea02c8334dbe42a47a2aee1cbe35a2943d6518c93a1d77325e58ad74cb93828b6c691ea9
SSDEEP 1536:R/jHykurhMvDg25ZNzRZWyWPFdHIqrHU8:R/jHykurQ3rWy4fIqo8
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 29KB
SHA256 9d25cc704b1c00c9d17903e25ca35c319663e997cb9da0b116790b639e9688f2
MD5 70aa23c9229741a9b52e5ce388a883ac
SHA1 b42683e21e13de3f71db26635954d992ebe7119e
SHA512 be604a2ad5ab8a3e5edb8901016a76042ba873c8d05b4ef8eec31241377ec6b2a883b51c6912dc7640581ffa624547db334683975883ae74e62808b5ae9ab0b5
SSDEEP 768:XocAX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIocVSEF:SKcR4mjD9r823F
MD5 SHA1 SHA512 SSDEEP

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memory/4140-0-0x0000000000610000-0x0000000000627000-memory.dmp

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memory/4140-1-0x0000000000610000-0x0000000000627000-memory.dmp

Download

memory/4140-8-0x0000000000610000-0x0000000000627000-memory.dmp

Download

memory/4216-9-0x0000000000F50000-0x0000000000F67000-memory.dmp

Download

memory/4216-28-0x0000000000F50000-0x0000000000F67000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads