nymaim | b6781b3e1a3ad14f1cc6d92deb6802fddac98d32dd6091c8789529b923091041

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
07/12/2022, 03:33

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General

Target
file.exe
Size 2.2MB
Sample221207-d37m2aeb9z
SHA256 b6781b3e1a3ad14f1cc6d92deb6802fddac98d32dd6091c8789529b923091041
MD5 140f0a5a7ab41cb534e8444e468bf722
SHA1 c9aaa525bc839266d10581c459840601d1925a7a
SHA512 68a36aa7d56973e0a1e2015b13f0bc2485cb4779fc8fef281f8c195ebbb43bae0e854f387b62420159276dbcb8e2b52bd55db17aa7c92f9dd9d9bf0a2c086179
SSDEEP 24576:dizf0Ztim0Ntr/6XZ7zxam6EhohScWqzbh95b3svmeEuzErGBRu2oWDSqyzOi6Vp:2f4ZqINLNhohMghJeEuzE12tSqriZu
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
4596	is-52H62.tmp
3480	RintFolders.exe
4608	SuMPcLrxLSC.exe

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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	RintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4596	is-52H62.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-I2846.tmp	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GJL29.tmp	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0ITI8.tmp	is-52H62.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\RintFolders.exe	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T72PQ.tmp	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8SOPT.tmp	is-52H62.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6MNN8.tmp	is-52H62.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-52H62.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
4728	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3480	RintFolders.exe
3480	RintFolders.exe
3480	RintFolders.exe
3480	RintFolders.exe
3480	RintFolders.exe
3480	RintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4728	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4596	5016	file.exe	29
PID 5016 wrote to memory of 4596	5016	file.exe	29
PID 5016 wrote to memory of 4596	5016	file.exe	29
PID 4596 wrote to memory of 3480	4596	is-52H62.tmp	83
PID 4596 wrote to memory of 3480	4596	is-52H62.tmp	83
PID 4596 wrote to memory of 3480	4596	is-52H62.tmp	83
PID 3480 wrote to memory of 4608	3480	RintFolders.exe	84
PID 3480 wrote to memory of 4608	3480	RintFolders.exe	84
PID 3480 wrote to memory of 4608	3480	RintFolders.exe	84
PID 3480 wrote to memory of 1904	3480	RintFolders.exe	94
PID 3480 wrote to memory of 1904	3480	RintFolders.exe	94
PID 3480 wrote to memory of 1904	3480	RintFolders.exe	94
PID 1904 wrote to memory of 4728	1904	cmd.exe	95
PID 1904 wrote to memory of 4728	1904	cmd.exe	95
PID 1904 wrote to memory of 4728	1904	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Users\Admin\AppData\Local\Temp\is-P8GM2.tmp\is-52H62.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-P8GM2.tmp\is-52H62.tmp" /SL4 $A0046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2077702 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4596
- - C:\Program Files (x86)\PrintFolders\RintFolders.exe
    "C:\Program Files (x86)\PrintFolders\RintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3480
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\SuMPcLrxLSC.exe
      4⤵
      Executes dropped EXE
      PID:4608
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "RintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\RintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1904
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "RintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4728

Network

MITRE ATT&CK Enterprise v6

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

RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 07a39e52bf92a60fa0b4ed7f073154a150f9cbe1faedb595bafee7cffca038e4
MD5 d5c9f350032a6384661c3691dc006d8a
SHA1 3906c07fea778ca3cc2e10391721f1ff27555dd7
SHA512 8b724dcc1e1abe89ecd7d486275ef8d00c90acbf7be1406736617c077abe663c87557f1915e173f9918ef260e8c919c4d105d715ae8de1d84008bc33358663e3
SSDEEP 98304:mGVRgr+0mA4XNyFTB7J6mTU1WMZOJFE6EuTQ:CFAR
MD5 SHA1 SHA512 SSDEEP

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RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 07a39e52bf92a60fa0b4ed7f073154a150f9cbe1faedb595bafee7cffca038e4
MD5 d5c9f350032a6384661c3691dc006d8a
SHA1 3906c07fea778ca3cc2e10391721f1ff27555dd7
SHA512 8b724dcc1e1abe89ecd7d486275ef8d00c90acbf7be1406736617c077abe663c87557f1915e173f9918ef260e8c919c4d105d715ae8de1d84008bc33358663e3
SSDEEP 98304:mGVRgr+0mA4XNyFTB7J6mTU1WMZOJFE6EuTQ:CFAR
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-IM9CG.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-52H62.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-P8GM2.tmp\is-52H62.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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is-52H62.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-P8GM2.tmp\is-52H62.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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SuMPcLrxLSC.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\SuMPcLrxLSC.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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SuMPcLrxLSC.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\SuMPcLrxLSC.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/3480-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3480-142-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3480-143-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3480-144-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3480-152-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/3480-155-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/5016-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/5016-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/5016-156-0x0000000000400000-0x000000000041E000-memory.dmp

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