nymaim | 4f46bc7fe2f665a4a4f87608a607b9b4c7b724aef7483bed0002397b67e5f21d

Analysis

max time kernel
90s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2023, 11:02

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General

Target
file.exe
Size 1.1MB
Sample230109-m443zadh88
SHA256 4f46bc7fe2f665a4a4f87608a607b9b4c7b724aef7483bed0002397b67e5f21d
MD5 355813eac9dbb83ae3d8c7181feaee7b
SHA1 897c89f79a0fa59170b7820577399ace13d74c99
SHA512 d50214dcb70ed5d9a12e60c79e8ead51a2e8aa5dc0b3393b70e29049aa2ed67b263b2b69dce8a5f7aac1eb1e809c2d60eefe4c5afc5cf0079301d9b70bf4948e
SSDEEP 24576:R20udNUT8TIIPKdYIDm75zh/nThSe+Skl5l/Hlc:R2/RWXm75u9l50
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
456	file.tmp
4912	JitFiles135.exe
4448	0PbGSFC6F.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	JitFiles135.exe

Loads dropped DLL 1 IoCs

pid	Process
456	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\language\is-SIUA7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-QJ5R0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-PG89K.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-JADGQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-O0SP1.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-UU8B0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IELVG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ME8N5.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\JitFiles135.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-52LUQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ISIK7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-87HD6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-MS46Q.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-75RV2.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-SJCEF.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
2104	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4912	JitFiles135.exe
4912	JitFiles135.exe
4912	JitFiles135.exe
4912	JitFiles135.exe
4912	JitFiles135.exe
4912	JitFiles135.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2104	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 456	2268	file.exe	81
PID 2268 wrote to memory of 456	2268	file.exe	81
PID 2268 wrote to memory of 456	2268	file.exe	81
PID 456 wrote to memory of 4912	456	file.tmp	82
PID 456 wrote to memory of 4912	456	file.tmp	82
PID 456 wrote to memory of 4912	456	file.tmp	82
PID 4912 wrote to memory of 4448	4912	JitFiles135.exe	83
PID 4912 wrote to memory of 4448	4912	JitFiles135.exe	83
PID 4912 wrote to memory of 4448	4912	JitFiles135.exe	83
PID 4912 wrote to memory of 1452	4912	JitFiles135.exe	91
PID 4912 wrote to memory of 1452	4912	JitFiles135.exe	91
PID 4912 wrote to memory of 1452	4912	JitFiles135.exe	91
PID 1452 wrote to memory of 2104	1452	cmd.exe	93
PID 1452 wrote to memory of 2104	1452	cmd.exe	93
PID 1452 wrote to memory of 2104	1452	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:2268
- C:\Users\Admin\AppData\Local\Temp\is-51GRT.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-51GRT.tmp\file.tmp" /SL5="$9006C,885632,51712,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:456
- - C:\Program Files (x86)\Split Files\JitFiles135.exe
    "C:\Program Files (x86)\Split Files\JitFiles135.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4912
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\0PbGSFC6F.exe
      4⤵
      Executes dropped EXE
      PID:4448
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "JitFiles135.exe" /f & erase "C:\Program Files (x86)\Split Files\JitFiles135.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1452
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "JitFiles135.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2104

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

JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.6MB
SHA256 c38b0ed4441d7a29cc03a021d2d74b4b9397e0e478c25ee70fe8ab905cac4399
MD5 05f45779bedd3f6a3b274e62e63bca00
SHA1 a90389f1c01e96dc2b13b2cfee4acc03657ff241
SHA512 d325d91b54f26bc2304aac64a1ea36e74bc55c35aa0a74553ee76c91c77416041fd20ac9b3dd2662852051671d4e81187fcaaec63cf6f794c2506f2b7fba2df4
SSDEEP 24576:2LPqtMIH1ZxJHDkLNoMxECH9bFGXpDm92LKA7gki9/VQB9ugkZbQO6QEhBG:UqWGD7SDxv8s3ki9/VYuGvu
MD5 SHA1 SHA512 SSDEEP

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JitFiles135.exe

Path C:\Program Files (x86)\Split Files\JitFiles135.exe
Size 1.6MB
SHA256 c38b0ed4441d7a29cc03a021d2d74b4b9397e0e478c25ee70fe8ab905cac4399
MD5 05f45779bedd3f6a3b274e62e63bca00
SHA1 a90389f1c01e96dc2b13b2cfee4acc03657ff241
SHA512 d325d91b54f26bc2304aac64a1ea36e74bc55c35aa0a74553ee76c91c77416041fd20ac9b3dd2662852051671d4e81187fcaaec63cf6f794c2506f2b7fba2df4
SSDEEP 24576:2LPqtMIH1ZxJHDkLNoMxECH9bFGXpDm92LKA7gki9/VQB9ugkZbQO6QEhBG:UqWGD7SDxv8s3ki9/VYuGvu
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-51GRT.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-51GRT.tmp\file.tmp
Size 692KB
SHA256 30893d74dace626f98a12862d02b582ecec4671c338f8638f637e53a700e5dd1
MD5 7958276140c2d23a53ae8a1f2aa20771
SHA1 fd6b462e6d69efff1d57575b084212c8e57367aa
SHA512 772c61d78659ce76c4c7ea36bf092958b212414a874434e06272c709d221e74855a388273bcc677e94dff61cd593aba7b74368f716784e68a40516d28da9477b
SSDEEP 12288:cuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNmXEx9BF:cN/ac4cUrPN37qzHxA6odmL+tNE70tmF
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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0PbGSFC6F.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\0PbGSFC6F.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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0PbGSFC6F.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\0PbGSFC6F.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/2268-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2268-155-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2268-138-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4912-143-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/4912-151-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/4912-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4912-142-0x0000000000400000-0x000000000139B000-memory.dmp

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memory/4912-154-0x0000000000400000-0x000000000139B000-memory.dmp

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