nymaim | d3043bce9e929d551fb5eb3d51044e1cef50560b2c24ffab3bc7346c24ce8b09

Analysis

max time kernel
91s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
11/01/2023, 04:16

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General

Target
file.exe
Size 1.4MB
Sample230111-evs1caad68
SHA256 d3043bce9e929d551fb5eb3d51044e1cef50560b2c24ffab3bc7346c24ce8b09
MD5 03b6a7b43bc41de80efd13cde5e4335c
SHA1 097d9b72b17a14b0d48d0a63e83996c6ee7813aa
SHA512 e547f2317dd0a0e6ff45c67014835ade2d9c9ebabf62bc49f9d4c955af754873a0f636f294a11787854db090d6376984e8fcd1923c9c887fd42d94db89ba326a
SSDEEP 24576:q20IFqKccUk8gQ0x3GKqHEJkyke87aDpcJ634C75eBqgXC75ld1qSVpk:q2YKcXkQu3Mike874aJ631iOd1qapk
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
5064	file.tmp
4908	LitFiles137.exe
4796	kL1Vh.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	LitFiles137.exe

Loads dropped DLL 1 IoCs

pid	Process
5064	file.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-8T7FD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-HM397.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-G2VCV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-61HV9.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\LitFiles137.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-RDPTD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-6JMT2.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-V1HD5.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1FSDL.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3OGI7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MEETJ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-D7N9N.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-LMVT7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-E56MB.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IHG5I.tmp	file.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
2120	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4908	LitFiles137.exe
4908	LitFiles137.exe
4908	LitFiles137.exe
4908	LitFiles137.exe
4908	LitFiles137.exe
4908	LitFiles137.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2120	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3444 wrote to memory of 5064	3444	file.exe	81
PID 3444 wrote to memory of 5064	3444	file.exe	81
PID 3444 wrote to memory of 5064	3444	file.exe	81
PID 5064 wrote to memory of 4908	5064	file.tmp	82
PID 5064 wrote to memory of 4908	5064	file.tmp	82
PID 5064 wrote to memory of 4908	5064	file.tmp	82
PID 4908 wrote to memory of 4796	4908	LitFiles137.exe	83
PID 4908 wrote to memory of 4796	4908	LitFiles137.exe	83
PID 4908 wrote to memory of 4796	4908	LitFiles137.exe	83
PID 4908 wrote to memory of 5000	4908	LitFiles137.exe	91
PID 4908 wrote to memory of 5000	4908	LitFiles137.exe	91
PID 4908 wrote to memory of 5000	4908	LitFiles137.exe	91
PID 5000 wrote to memory of 2120	5000	cmd.exe	93
PID 5000 wrote to memory of 2120	5000	cmd.exe	93
PID 5000 wrote to memory of 2120	5000	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3444
- C:\Users\Admin\AppData\Local\Temp\is-U5SKE.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-U5SKE.tmp\file.tmp" /SL5="$9006C,1232498,212992,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5064
- - C:\Program Files (x86)\Split Files\LitFiles137.exe
    "C:\Program Files (x86)\Split Files\LitFiles137.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4908
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\kL1Vh.exe
      4⤵
      Executes dropped EXE
      PID:4796
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles137.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles137.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5000
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2120

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

LitFiles137.exe

Path C:\Program Files (x86)\Split Files\LitFiles137.exe
Size 2.0MB
SHA256 a28abadf35ca22ff062ff2690f8d84bf797df3420377f88771b593090929ecf6
MD5 7589346d40d94172c249c17fb525e5d2
SHA1 5f87382d5a4afed9dd7503460bd0fd2777542be6
SHA512 0404bb68ba627c89be109b5dc90f6048ba317212d94bf95cf5c80f22a5a1e54214388d4f607a3625aa76df26bdf6a17835eca2fdc23ccc20c2e5b5b380ab7fa5
SSDEEP 24576:ldnMUH8PBggS+xReR4Xj/ZQGcaSsp8bXMYpL1rXr:EUH8PBggS+oYj2GcaaXMQ7
MD5 SHA1 SHA512 SSDEEP

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LitFiles137.exe

Path C:\Program Files (x86)\Split Files\LitFiles137.exe
Size 2.0MB
SHA256 a28abadf35ca22ff062ff2690f8d84bf797df3420377f88771b593090929ecf6
MD5 7589346d40d94172c249c17fb525e5d2
SHA1 5f87382d5a4afed9dd7503460bd0fd2777542be6
SHA512 0404bb68ba627c89be109b5dc90f6048ba317212d94bf95cf5c80f22a5a1e54214388d4f607a3625aa76df26bdf6a17835eca2fdc23ccc20c2e5b5b380ab7fa5
SSDEEP 24576:ldnMUH8PBggS+xReR4Xj/ZQGcaSsp8bXMYpL1rXr:EUH8PBggS+oYj2GcaaXMQ7
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-U5SKE.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-U5SKE.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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kL1Vh.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\kL1Vh.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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kL1Vh.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\kL1Vh.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/3444-155-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/3444-138-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/3444-132-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/4908-143-0x0000000000400000-0x00000000013F4000-memory.dmp

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memory/4908-142-0x0000000000400000-0x00000000013F4000-memory.dmp

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memory/4908-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4908-151-0x0000000000400000-0x00000000013F4000-memory.dmp

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memory/4908-154-0x0000000000400000-0x00000000013F4000-memory.dmp

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