nymaim | 6690b5fbc00cf2b0273ff783aa8def58b20c748784efe9007e9db1b526838f59

Analysis

max time kernel
94s
max time network
178s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
08/12/2022, 18:16

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General

Target
file.exe
Size 2.2MB
Sample221208-wwf6lsdf6s
SHA256 6690b5fbc00cf2b0273ff783aa8def58b20c748784efe9007e9db1b526838f59
MD5 664eea992aeb54ba1174a09cd8373f11
SHA1 7de7f1ac4665504eb53fba58b89d75e8a72dd037
SHA512 6d1216bde6417794f5ba981c2ad01279e68d1373a90688e429a37247d200043859ee74a8268315be127c67ff3c11096d1a6553d7e92b47bf1832d5544055481f
SSDEEP 49152:K1TJ7H7mffHe2jjMWBolB97pTXhN8acz2E03X3+ywh/SZwN41kx:KFxiffjjlSX9Byz2Ej36q
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
5008	is-KTBFO.tmp
4984	IntFolders.exe
1608	j8AnTYUU38.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	IntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
5008	is-KTBFO.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\unins000.dat	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-77PKI.tmp	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GC26M.tmp	is-KTBFO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\IntFolders.exe	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BBE2Q.tmp	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7BG27.tmp	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GHCOJ.tmp	is-KTBFO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H9J4A.tmp	is-KTBFO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-KTBFO.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
1176	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4984	IntFolders.exe
4984	IntFolders.exe
4984	IntFolders.exe
4984	IntFolders.exe
4984	IntFolders.exe
4984	IntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4344 wrote to memory of 5008	4344	file.exe	80
PID 4344 wrote to memory of 5008	4344	file.exe	80
PID 4344 wrote to memory of 5008	4344	file.exe	80
PID 5008 wrote to memory of 4984	5008	is-KTBFO.tmp	81
PID 5008 wrote to memory of 4984	5008	is-KTBFO.tmp	81
PID 5008 wrote to memory of 4984	5008	is-KTBFO.tmp	81
PID 4984 wrote to memory of 1608	4984	IntFolders.exe	82
PID 4984 wrote to memory of 1608	4984	IntFolders.exe	82
PID 4984 wrote to memory of 1608	4984	IntFolders.exe	82
PID 4984 wrote to memory of 3828	4984	IntFolders.exe	91
PID 4984 wrote to memory of 3828	4984	IntFolders.exe	91
PID 4984 wrote to memory of 3828	4984	IntFolders.exe	91
PID 3828 wrote to memory of 1176	3828	cmd.exe	93
PID 3828 wrote to memory of 1176	3828	cmd.exe	93
PID 3828 wrote to memory of 1176	3828	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:4344
- C:\Users\Admin\AppData\Local\Temp\is-I9MUS.tmp\is-KTBFO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-I9MUS.tmp\is-KTBFO.tmp" /SL4 $A0040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2086668 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5008
- - C:\Program Files (x86)\PrintFolders\IntFolders.exe
    "C:\Program Files (x86)\PrintFolders\IntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4984
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\j8AnTYUU38.exe
      4⤵
      Executes dropped EXE
      PID:1608
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "IntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\IntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3828
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "IntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1176

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

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Downloads

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 8eada9570fd4455658e08cc8313d65d1d9ee6afdb720a2009921c8b2875ff7e3
MD5 34ec957db9fa6c943f2d3c71200ba524
SHA1 c252b99c7c5f9a9ecbecd2e3a9469cb1b1409989
SHA512 0042b42d9c388fb8da3530fd122f67f4625af6a6346e757ef5211f9dc1b943ce30655f646c86e0583b86119b5b0db354fca64f28fcd2e18d6a9e916154ce5aac
SSDEEP 49152:jFL/+U5QJXtB48bS+oBw7a6HTJPB7SdSlYLZ:jd/+U5QJXr/bHoL6lPB7SdSlu
MD5 SHA1 SHA512 SSDEEP

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IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 8eada9570fd4455658e08cc8313d65d1d9ee6afdb720a2009921c8b2875ff7e3
MD5 34ec957db9fa6c943f2d3c71200ba524
SHA1 c252b99c7c5f9a9ecbecd2e3a9469cb1b1409989
SHA512 0042b42d9c388fb8da3530fd122f67f4625af6a6346e757ef5211f9dc1b943ce30655f646c86e0583b86119b5b0db354fca64f28fcd2e18d6a9e916154ce5aac
SSDEEP 49152:jFL/+U5QJXtB48bS+oBw7a6HTJPB7SdSlYLZ:jd/+U5QJXr/bHoL6lPB7SdSlu
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-51NJV.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-KTBFO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9MUS.tmp\is-KTBFO.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-KTBFO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9MUS.tmp\is-KTBFO.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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j8AnTYUU38.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\j8AnTYUU38.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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j8AnTYUU38.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\j8AnTYUU38.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/4344-132-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4344-137-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4344-156-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4984-143-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/4984-144-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/4984-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4984-152-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/4984-142-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/4984-155-0x0000000000400000-0x000000000154A000-memory.dmp

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